Articles | Volume 19, issue 7
https://doi.org/10.5194/acp-19-4783-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-19-4783-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
10 Apr 2019
Research article |
| 10 Apr 2019
| 10 Apr 2019
Evaluation of CESM1 (WACCM) free-running and specified dynamics atmospheric composition simulations using global multispecies satellite data records
Lucien Froidevaux
CORRESPONDING AUTHOR
Jet Propulsion Laboratory, California Institute of Technology,
Pasadena, CA, USA
Douglas E. Kinnison
National Center for Atmospheric Research, Boulder, CO, USA
School of Earth and Atmospheric Sciences, Georgia Institute of
Technology, Atlanta, GA, USA
John Anderson
School of Science, Hampton University, Hampton, VA, USA
Ryan A. Fuller
Jet Propulsion Laboratory, California Institute of Technology,
Pasadena, CA, USA
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The hydroxyl radical determines the atmospheric lifetimes of numerous species including methane. Since OH is very short-lived, it is not possible to directly measure its concentration on scales relevant for understanding its effect on other species. Here, OH is inferred by looking at changes in hydrofluorocarbons (HFCs). We find that OH levels have been fairly stable over our study period (2004 to 2021), suggesting that OH is not the main driver of the recent increase in atmospheric methane.
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EGUsphere, https://doi.org/10.5194/egusphere-2023-2150, https://doi.org/10.5194/egusphere-2023-2150, 2023
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Atmospheric bromine destroys ozone, impacts oxidation capacity, and is the main oxidant of mercury into its toxic form. We constrain bromine by remote sensing of BrO from a mountaintop. Previous measurements retrieved 2–3 pieces of information vertically, we apply new methods to get 5.5 vertically and 2 more in time. We compare with aircraft measurements to validate the methods and look at variation in BrO over the Pacific. More information will help chemical models and satellite measurements.
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Atmos. Chem. Phys., 23, 13355–13367, https://doi.org/10.5194/acp-23-13355-2023, https://doi.org/10.5194/acp-23-13355-2023, 2023
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The 2022 Hunga Tonga eruption injected a large amount of water into the stratosphere. Ozone depletion was observed inside the volcanic plume. Chlorine and water vapor injected by this eruption exceeded the normal range, which made the ozone chemistry during this event occur at a higher temperature than polar ozone depletion. Unlike polar ozone chemistry where chlorine nitrate is more important, hypochlorous acid plays a large role in the in-plume chlorine balance and heterogeneous processes.
Michael Kiefer, Dale F. Hurst, Gabriele P. Stiller, Stefan Lossow, Holger Vömel, John Anderson, Faiza Azam, Jean-Loup Bertaux, Laurent Blanot, Klaus Bramstedt, John P. Burrows, Robert Damadeo, Bianca Maria Dinelli, Patrick Eriksson, Maya García-Comas, John C. Gille, Mark Hervig, Yasuko Kasai, Farahnaz Khosrawi, Donal Murtagh, Gerald E. Nedoluha, Stefan Noël, Piera Raspollini, William G. Read, Karen H. Rosenlof, Alexei Rozanov, Christopher E. Sioris, Takafumi Sugita, Thomas von Clarmann, Kaley A. Walker, and Katja Weigel
Atmos. Meas. Tech., 16, 4589–4642, https://doi.org/10.5194/amt-16-4589-2023, https://doi.org/10.5194/amt-16-4589-2023, 2023
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We quantify biases and drifts (and their uncertainties) between the stratospheric water vapor measurement records of 15 satellite-based instruments (SATs, with 31 different retrievals) and balloon-borne frost point hygrometers (FPs) launched at 27 globally distributed stations. These comparisons of measurements during the period 2000–2016 are made using robust, consistent statistical methods. With some exceptions, the biases and drifts determined for most SAT–FP pairs are < 10 % and < 1 % yr−1.
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Masanori Takeda, Hideaki Nakajima, Isao Murata, Tomoo Nagahama, Isamu Morino, Geoffrey C. Toon, Ray F. Weiss, Jens Mühle, Paul B. Krummel, Paul J. Fraser, and Hsiang-Jui Wang
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Michaela I. Hegglin, Susann Tegtmeier, John Anderson, Adam E. Bourassa, Samuel Brohede, Doug Degenstein, Lucien Froidevaux, Bernd Funke, John Gille, Yasuko Kasai, Erkki T. Kyrölä, Jerry Lumpe, Donal Murtagh, Jessica L. Neu, Kristell Pérot, Ellis E. Remsberg, Alexei Rozanov, Matthew Toohey, Joachim Urban, Thomas von Clarmann, Kaley A. Walker, Hsiang-Jui Wang, Carlo Arosio, Robert Damadeo, Ryan A. Fuller, Gretchen Lingenfelser, Christopher McLinden, Diane Pendlebury, Chris Roth, Niall J. Ryan, Christopher Sioris, Lesley Smith, and Katja Weigel
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Chaim I. Garfinkel, Ohad Harari, Shlomi Ziskin Ziv, Jian Rao, Olaf Morgenstern, Guang Zeng, Simone Tilmes, Douglas Kinnison, Fiona M. O'Connor, Neal Butchart, Makoto Deushi, Patrick Jöckel, Andrea Pozzer, and Sean Davis
Atmos. Chem. Phys., 21, 3725–3740, https://doi.org/10.5194/acp-21-3725-2021, https://doi.org/10.5194/acp-21-3725-2021, 2021
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Water vapor is the dominant greenhouse gas in the atmosphere, and El Niño is the dominant mode of variability in the ocean–atmosphere system. The connection between El Niño and water vapor above ~ 17 km is unclear, with single-model studies reaching a range of conclusions. This study examines this connection in 12 different models. While there are substantial differences among the models, all models appear to capture the fundamental physical processes correctly.
Patrick E. Sheese, Kaley A. Walker, Chris D. Boone, Doug A. Degenstein, Felicia Kolonjari, David Plummer, Douglas E. Kinnison, Patrick Jöckel, and Thomas von Clarmann
Atmos. Meas. Tech., 14, 1425–1438, https://doi.org/10.5194/amt-14-1425-2021, https://doi.org/10.5194/amt-14-1425-2021, 2021
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Output from climate chemistry models (CMAM, EMAC, and WACCM) is used to estimate the expected geophysical variability of ozone concentrations between coincident satellite instrument measurement times and geolocations. We use the Canadian ACE-FTS and OSIRIS instruments as a case study. Ensemble mean estimates are used to optimize coincidence criteria between the two instruments, allowing for the use of more coincident profiles while providing an estimate of the geophysical variation.
Marc von Hobe, Felix Ploeger, Paul Konopka, Corinna Kloss, Alexey Ulanowski, Vladimir Yushkov, Fabrizio Ravegnani, C. Michael Volk, Laura L. Pan, Shawn B. Honomichl, Simone Tilmes, Douglas E. Kinnison, Rolando R. Garcia, and Jonathon S. Wright
Atmos. Chem. Phys., 21, 1267–1285, https://doi.org/10.5194/acp-21-1267-2021, https://doi.org/10.5194/acp-21-1267-2021, 2021
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The Asian summer monsoon (ASM) is known to foster transport of polluted tropospheric air into the stratosphere. To test and amend our picture of ASM vertical transport, we analyse distributions of airborne trace gas observations up to 20 km altitude near the main ASM vertical conduit south of the Himalayas. We also show that a new high-resolution version of the global chemistry climate model WACCM is able to reproduce the observations well.
Arseniy Karagodin-Doyennel, Eugene Rozanov, Ales Kuchar, William Ball, Pavle Arsenovic, Ellis Remsberg, Patrick Jöckel, Markus Kunze, David A. Plummer, Andrea Stenke, Daniel Marsh, Doug Kinnison, and Thomas Peter
Atmos. Chem. Phys., 21, 201–216, https://doi.org/10.5194/acp-21-201-2021, https://doi.org/10.5194/acp-21-201-2021, 2021
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The solar signal in the mesospheric H2O and CO was extracted from the CCMI-1 model simulations and satellite observations using multiple linear regression (MLR) analysis. MLR analysis shows a pronounced and statistically robust solar signal in both H2O and CO. The model results show a general agreement with observations reproducing a negative/positive solar signal in H2O/CO. The pattern of the solar signal varies among the considered models, reflecting some differences in the model setup.
Yuanhong Zhao, Marielle Saunois, Philippe Bousquet, Xin Lin, Antoine Berchet, Michaela I. Hegglin, Josep G. Canadell, Robert B. Jackson, Makoto Deushi, Patrick Jöckel, Douglas Kinnison, Ole Kirner, Sarah Strode, Simone Tilmes, Edward J. Dlugokencky, and Bo Zheng
Atmos. Chem. Phys., 20, 13011–13022, https://doi.org/10.5194/acp-20-13011-2020, https://doi.org/10.5194/acp-20-13011-2020, 2020
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Decadal trends and variations in OH are critical for understanding atmospheric CH4 evolution. We quantify the impacts of OH trends and variations on the CH4 budget by conducting CH4 inversions on a decadal scale with an ensemble of OH fields. We find the negative OH anomalies due to enhanced fires can reduce the optimized CH4 emissions by up to 10 Tg yr−1 during El Niño years and the positive OH trend from 1986 to 2010 results in a ∼ 23 Tg yr−1 additional increase in optimized CH4 emissions.
Daniele Minganti, Simon Chabrillat, Yves Christophe, Quentin Errera, Marta Abalos, Maxime Prignon, Douglas E. Kinnison, and Emmanuel Mahieu
Atmos. Chem. Phys., 20, 12609–12631, https://doi.org/10.5194/acp-20-12609-2020, https://doi.org/10.5194/acp-20-12609-2020, 2020
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The climatology of the N2O transport budget in the stratosphere is studied in the transformed Eulerian mean framework across a variety of datasets: a chemistry climate model, a chemistry transport model driven by four reanalyses and a chemical reanalysis. The impact of vertical advection on N2O agrees well in the datasets, but horizontal mixing presents large differences above the Antarctic and in the whole Northern Hemisphere.
Matt Amos, Paul J. Young, J. Scott Hosking, Jean-François Lamarque, N. Luke Abraham, Hideharu Akiyoshi, Alexander T. Archibald, Slimane Bekki, Makoto Deushi, Patrick Jöckel, Douglas Kinnison, Ole Kirner, Markus Kunze, Marion Marchand, David A. Plummer, David Saint-Martin, Kengo Sudo, Simone Tilmes, and Yousuke Yamashita
Atmos. Chem. Phys., 20, 9961–9977, https://doi.org/10.5194/acp-20-9961-2020, https://doi.org/10.5194/acp-20-9961-2020, 2020
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We present an updated projection of Antarctic ozone hole recovery using an ensemble of chemistry–climate models. To do so, we employ a method, more advanced and skilful than the current multi-model mean standard, which is applicable to other ensemble analyses. It calculates the performance and similarity of the models, which we then use to weight the model. Calculating model similarity allows us to account for models which are constructed from similar components.
Malte Meinshausen, Zebedee R. J. Nicholls, Jared Lewis, Matthew J. Gidden, Elisabeth Vogel, Mandy Freund, Urs Beyerle, Claudia Gessner, Alexander Nauels, Nico Bauer, Josep G. Canadell, John S. Daniel, Andrew John, Paul B. Krummel, Gunnar Luderer, Nicolai Meinshausen, Stephen A. Montzka, Peter J. Rayner, Stefan Reimann, Steven J. Smith, Marten van den Berg, Guus J. M. Velders, Martin K. Vollmer, and Ray H. J. Wang
Geosci. Model Dev., 13, 3571–3605, https://doi.org/10.5194/gmd-13-3571-2020, https://doi.org/10.5194/gmd-13-3571-2020, 2020
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This study provides the future greenhouse gas (GHG) concentrations under the new set of so-called SSP scenarios (the successors of the IPCC SRES and previous representative concentration pathway (RCP) scenarios). The projected CO2 concentrations range from 350 ppm for low-emission scenarios by 2150 to more than 2000 ppm under the high-emission scenarios. We also provide concentrations, latitudinal gradients, and seasonality for most of the other 42 considered GHGs.
Daniele Visioni, Giovanni Pitari, Vincenzo Rizi, Marco Iarlori, Irene Cionni, Ilaria Quaglia, Hideharu Akiyoshi, Slimane Bekki, Neal Butchart, Martin Chipperfield, Makoto Deushi, Sandip S. Dhomse, Rolando Garcia, Patrick Joeckel, Douglas Kinnison, Jean-François Lamarque, Marion Marchand, Martine Michou, Olaf Morgenstern, Tatsuya Nagashima, Fiona M. O'Connor, Luke D. Oman, David Plummer, Eugene Rozanov, David Saint-Martin, Robyn Schofield, John Scinocca, Andrea Stenke, Kane Stone, Kengo Sudo, Taichu Y. Tanaka, Simone Tilmes, Holger Tost, Yousuke Yamashita, and Guang Zeng
Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2020-525, https://doi.org/10.5194/acp-2020-525, 2020
Preprint withdrawn
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In this work we analyse the trend in ozone profiles taken at L'Aquila (Italy, 42.4° N) for seventeen years, between 2000 and 2016 and compare them against already available measured ozone trends. We try to understand and explain the observed trends at various heights in light of the simulations from seventeen different model, highlighting the contribution of changes in circulation and chemical ozone loss during this time period.
Peter G. Simmonds, Matthew Rigby, Alistair J. Manning, Sunyoung Park, Kieran M. Stanley, Archie McCulloch, Stephan Henne, Francesco Graziosi, Michela Maione, Jgor Arduini, Stefan Reimann, Martin K. Vollmer, Jens Mühle, Simon O'Doherty, Dickon Young, Paul B. Krummel, Paul J. Fraser, Ray F. Weiss, Peter K. Salameh, Christina M. Harth, Mi-Kyung Park, Hyeri Park, Tim Arnold, Chris Rennick, L. Paul Steele, Blagoj Mitrevski, Ray H. J. Wang, and Ronald G. Prinn
Atmos. Chem. Phys., 20, 7271–7290, https://doi.org/10.5194/acp-20-7271-2020, https://doi.org/10.5194/acp-20-7271-2020, 2020
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Sulfur hexafluoride (SF6) is a potent greenhouse gas which is regulated under the Kyoto Protocol. From a 40-year record of measurements, collected at five global monitoring sites and archived air samples, we show that its concentration in the atmosphere has steadily increased. Using modelling techniques, we estimate that global emissions have increased by about 24 % over the past decade. We find that this increase is driven by the demand for SF6-insulated switchgear in developing countries.
Marta Abalos, Clara Orbe, Douglas E. Kinnison, David Plummer, Luke D. Oman, Patrick Jöckel, Olaf Morgenstern, Rolando R. Garcia, Guang Zeng, Kane A. Stone, and Martin Dameris
Atmos. Chem. Phys., 20, 6883–6901, https://doi.org/10.5194/acp-20-6883-2020, https://doi.org/10.5194/acp-20-6883-2020, 2020
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A set of state-of-the art chemistry–climate models is used to examine future changes in downward transport from the stratosphere, a key contributor to tropospheric ozone. The acceleration of the stratospheric circulation results in increased stratosphere-to-troposphere transport. In the subtropics, downward advection into the troposphere is enhanced due to climate change. At higher latitudes, the ozone reservoir above the tropopause is enlarged due to the stronger circulation and ozone recovery.
Clara Orbe, David A. Plummer, Darryn W. Waugh, Huang Yang, Patrick Jöckel, Douglas E. Kinnison, Beatrice Josse, Virginie Marecal, Makoto Deushi, Nathan Luke Abraham, Alexander T. Archibald, Martyn P. Chipperfield, Sandip Dhomse, Wuhu Feng, and Slimane Bekki
Atmos. Chem. Phys., 20, 3809–3840, https://doi.org/10.5194/acp-20-3809-2020, https://doi.org/10.5194/acp-20-3809-2020, 2020
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Atmospheric composition is strongly influenced by global-scale winds that are not always properly simulated in computer models. A common approach to correct for this bias is to relax or
nudgeto the observed winds. Here we systematically evaluate how well this technique performs across a large suite of chemistry–climate models in terms of its ability to reproduce key aspects of both the tropospheric and stratospheric circulations.
M. Patrick McCormick, Liqiao Lei, Michael T. Hill, John Anderson, Richard Querel, and Wolfgang Steinbrecht
Atmos. Meas. Tech., 13, 1287–1297, https://doi.org/10.5194/amt-13-1287-2020, https://doi.org/10.5194/amt-13-1287-2020, 2020
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We present a validation of O3 data from the SAGE III-ISS instrument using ground-based lidars and ozonesondes from Hohenpeißenberg and Lauder as well as O3 data from the ACE-FTS instrument. Average differences in the O3 concentration between SAGE III-ISS and the lidar and sonde observations are < 10 % over much of the lower and middle stratosphere. The ACE comparisons are < 5 % from 20 to 45 km. These results provide confidence in the SAGE III measurements of global stratospheric O3 profiles.
Julie M. Nicely, Bryan N. Duncan, Thomas F. Hanisco, Glenn M. Wolfe, Ross J. Salawitch, Makoto Deushi, Amund S. Haslerud, Patrick Jöckel, Béatrice Josse, Douglas E. Kinnison, Andrew Klekociuk, Michael E. Manyin, Virginie Marécal, Olaf Morgenstern, Lee T. Murray, Gunnar Myhre, Luke D. Oman, Giovanni Pitari, Andrea Pozzer, Ilaria Quaglia, Laura E. Revell, Eugene Rozanov, Andrea Stenke, Kane Stone, Susan Strahan, Simone Tilmes, Holger Tost, Daniel M. Westervelt, and Guang Zeng
Atmos. Chem. Phys., 20, 1341–1361, https://doi.org/10.5194/acp-20-1341-2020, https://doi.org/10.5194/acp-20-1341-2020, 2020
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Differences in methane lifetime among global models are large and poorly understood. We use a neural network method and simulations from the Chemistry Climate Model Initiative to quantify the factors influencing methane lifetime spread among models and variations over time. UV photolysis, tropospheric ozone, and nitrogen oxides drive large model differences, while the same factors plus specific humidity contribute to a decreasing trend in methane lifetime between 1980 and 2015.
Elizabeth Asher, Rebecca S. Hornbrook, Britton B. Stephens, Doug Kinnison, Eric J. Morgan, Ralph F. Keeling, Elliot L. Atlas, Sue M. Schauffler, Simone Tilmes, Eric A. Kort, Martin S. Hoecker-Martínez, Matt C. Long, Jean-François Lamarque, Alfonso Saiz-Lopez, Kathryn McKain, Colm Sweeney, Alan J. Hills, and Eric C. Apel
Atmos. Chem. Phys., 19, 14071–14090, https://doi.org/10.5194/acp-19-14071-2019, https://doi.org/10.5194/acp-19-14071-2019, 2019
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Halogenated organic trace gases, which are a source of reactive halogens to the atmosphere, exert a disproportionately large influence on atmospheric chemistry and climate. This paper reports novel aircraft observations of halogenated compounds over the Southern Ocean in summer and evaluates hypothesized regional sources and emissions of these trace gases through their relationships to additional aircraft observations.
Yuanhong Zhao, Marielle Saunois, Philippe Bousquet, Xin Lin, Antoine Berchet, Michaela I. Hegglin, Josep G. Canadell, Robert B. Jackson, Didier A. Hauglustaine, Sophie Szopa, Ann R. Stavert, Nathan Luke Abraham, Alex T. Archibald, Slimane Bekki, Makoto Deushi, Patrick Jöckel, Béatrice Josse, Douglas Kinnison, Ole Kirner, Virginie Marécal, Fiona M. O'Connor, David A. Plummer, Laura E. Revell, Eugene Rozanov, Andrea Stenke, Sarah Strode, Simone Tilmes, Edward J. Dlugokencky, and Bo Zheng
Atmos. Chem. Phys., 19, 13701–13723, https://doi.org/10.5194/acp-19-13701-2019, https://doi.org/10.5194/acp-19-13701-2019, 2019
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The role of hydroxyl radical changes in methane trends is debated, hindering our understanding of the methane cycle. This study quantifies how uncertainties in the hydroxyl radical may influence methane abundance in the atmosphere based on the inter-model comparison of hydroxyl radical fields and model simulations of CH4 abundance with different hydroxyl radical scenarios during 2000–2016. We show that hydroxyl radical changes could contribute up to 54 % of model-simulated methane biases.
Andreas Chrysanthou, Amanda C. Maycock, Martyn P. Chipperfield, Sandip Dhomse, Hella Garny, Douglas Kinnison, Hideharu Akiyoshi, Makoto Deushi, Rolando R. Garcia, Patrick Jöckel, Oliver Kirner, Giovanni Pitari, David A. Plummer, Laura Revell, Eugene Rozanov, Andrea Stenke, Taichu Y. Tanaka, Daniele Visioni, and Yousuke Yamashita
Atmos. Chem. Phys., 19, 11559–11586, https://doi.org/10.5194/acp-19-11559-2019, https://doi.org/10.5194/acp-19-11559-2019, 2019
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We perform the first multi-model comparison of the impact of nudged meteorology on the stratospheric residual circulation (RC) in chemistry–climate models. Nudging meteorology does not constrain the mean strength of RC compared to free-running simulations, and despite the lack of agreement in the mean circulation, nudging tightly constrains the inter-annual variability in the tropical upward mass flux in the lower stratosphere. In summary, nudging strongly affects the representation of RC.
Kévin Lamy, Thierry Portafaix, Béatrice Josse, Colette Brogniez, Sophie Godin-Beekmann, Hassan Bencherif, Laura Revell, Hideharu Akiyoshi, Slimane Bekki, Michaela I. Hegglin, Patrick Jöckel, Oliver Kirner, Ben Liley, Virginie Marecal, Olaf Morgenstern, Andrea Stenke, Guang Zeng, N. Luke Abraham, Alexander T. Archibald, Neil Butchart, Martyn P. Chipperfield, Glauco Di Genova, Makoto Deushi, Sandip S. Dhomse, Rong-Ming Hu, Douglas Kinnison, Michael Kotkamp, Richard McKenzie, Martine Michou, Fiona M. O'Connor, Luke D. Oman, Giovanni Pitari, David A. Plummer, John A. Pyle, Eugene Rozanov, David Saint-Martin, Kengo Sudo, Taichu Y. Tanaka, Daniele Visioni, and Kohei Yoshida
Atmos. Chem. Phys., 19, 10087–10110, https://doi.org/10.5194/acp-19-10087-2019, https://doi.org/10.5194/acp-19-10087-2019, 2019
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In this study, we simulate the ultraviolet radiation evolution during the 21st century on Earth's surface using the output from several numerical models which participated in the Chemistry-Climate Model Initiative. We present four possible futures which depend on greenhouse gases emissions. The role of ozone-depleting substances, greenhouse gases and aerosols are investigated. Our results emphasize the important role of aerosols for future ultraviolet radiation in the Northern Hemisphere.
Ohad Harari, Chaim I. Garfinkel, Shlomi Ziskin Ziv, Olaf Morgenstern, Guang Zeng, Simone Tilmes, Douglas Kinnison, Makoto Deushi, Patrick Jöckel, Andrea Pozzer, Fiona M. O'Connor, and Sean Davis
Atmos. Chem. Phys., 19, 9253–9268, https://doi.org/10.5194/acp-19-9253-2019, https://doi.org/10.5194/acp-19-9253-2019, 2019
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Ozone depletion in the Antarctic has been shown to influence surface conditions, but the effects of ozone depletion in the Arctic on surface climate are unclear. We show that Arctic ozone does influence surface climate in both polar regions and tropical regions, though the proximate cause of these surface impacts is not yet clear.
Huang Yang, Darryn W. Waugh, Clara Orbe, Guang Zeng, Olaf Morgenstern, Douglas E. Kinnison, Jean-Francois Lamarque, Simone Tilmes, David A. Plummer, Patrick Jöckel, Susan E. Strahan, Kane A. Stone, and Robyn Schofield
Atmos. Chem. Phys., 19, 5511–5528, https://doi.org/10.5194/acp-19-5511-2019, https://doi.org/10.5194/acp-19-5511-2019, 2019
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We evaluate the performance of a suite of models in simulating the large-scale transport from the northern midlatitudes to the Arctic using a CO-like idealized tracer. We find a large multi-model spread of the Arctic concentration of this CO-like tracer that is well correlated with the differences in the location of the midlatitude jet as well as the northern Hadley Cell edge. Our results suggest the Hadley Cell is key and zonal-mean transport by surface meridional flow needs better constraint.
Marianna Linz, Marta Abalos, Anne Sasha Glanville, Douglas E. Kinnison, Alison Ming, and Jessica L. Neu
Atmos. Chem. Phys., 19, 5069–5090, https://doi.org/10.5194/acp-19-5069-2019, https://doi.org/10.5194/acp-19-5069-2019, 2019
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The stratospheric circulation is important for transporting ozone and water vapor, and models of the stratosphere differ. The metrics used to compare models are inconsistent between studies and cannot be calculated from observational data. In this paper, we explore a metric for the circulation that can be calculated from observations and examine how it relates to the more commonly used metrics. We find substantial differences in the upper and lower stratosphere depending on the choice of metric.
Roland Eichinger, Simone Dietmüller, Hella Garny, Petr Šácha, Thomas Birner, Harald Bönisch, Giovanni Pitari, Daniele Visioni, Andrea Stenke, Eugene Rozanov, Laura Revell, David A. Plummer, Patrick Jöckel, Luke Oman, Makoto Deushi, Douglas E. Kinnison, Rolando Garcia, Olaf Morgenstern, Guang Zeng, Kane Adam Stone, and Robyn Schofield
Atmos. Chem. Phys., 19, 921–940, https://doi.org/10.5194/acp-19-921-2019, https://doi.org/10.5194/acp-19-921-2019, 2019
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To shed more light upon the changes in stratospheric circulation in the 21st century, climate projection simulations of 10 state-of-the-art global climate models, spanning from 1960 to 2100, are analyzed. The study shows that in addition to changes in transport, mixing also plays an important role in stratospheric circulation and that the properties of mixing vary over time. Furthermore, the influence of mixing is quantified and a dynamical framework is provided to understand the changes.
Laura E. Revell, Andrea Stenke, Fiona Tummon, Aryeh Feinberg, Eugene Rozanov, Thomas Peter, N. Luke Abraham, Hideharu Akiyoshi, Alexander T. Archibald, Neal Butchart, Makoto Deushi, Patrick Jöckel, Douglas Kinnison, Martine Michou, Olaf Morgenstern, Fiona M. O'Connor, Luke D. Oman, Giovanni Pitari, David A. Plummer, Robyn Schofield, Kane Stone, Simone Tilmes, Daniele Visioni, Yousuke Yamashita, and Guang Zeng
Atmos. Chem. Phys., 18, 16155–16172, https://doi.org/10.5194/acp-18-16155-2018, https://doi.org/10.5194/acp-18-16155-2018, 2018
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Global models such as those participating in the Chemistry-Climate Model Initiative (CCMI) consistently simulate biases in tropospheric ozone compared with observations. We performed an advanced statistical analysis with one of the CCMI models to understand the cause of the bias. We found that emissions of ozone precursor gases are the dominant driver of the bias, implying either that the emissions are too large, or that the way in which the model handles emissions needs to be improved.
Jens-Uwe Grooß, Rolf Müller, Reinhold Spang, Ines Tritscher, Tobias Wegner, Martyn P. Chipperfield, Wuhu Feng, Douglas E. Kinnison, and Sasha Madronich
Atmos. Chem. Phys., 18, 8647–8666, https://doi.org/10.5194/acp-18-8647-2018, https://doi.org/10.5194/acp-18-8647-2018, 2018
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We investigate a discrepancy between model simulations and observations of HCl in the dark polar stratosphere. In early winter, the less-well-studied period of the onset of chlorine activation, observations show a much faster depletion of HCl than simulations of three models. This points to some unknown process that is currently not represented in the models. Various hypotheses for potential causes are investigated that partly reduce the discrepancy. The impact on polar ozone depletion is low.
Sandip S. Dhomse, Douglas Kinnison, Martyn P. Chipperfield, Ross J. Salawitch, Irene Cionni, Michaela I. Hegglin, N. Luke Abraham, Hideharu Akiyoshi, Alex T. Archibald, Ewa M. Bednarz, Slimane Bekki, Peter Braesicke, Neal Butchart, Martin Dameris, Makoto Deushi, Stacey Frith, Steven C. Hardiman, Birgit Hassler, Larry W. Horowitz, Rong-Ming Hu, Patrick Jöckel, Beatrice Josse, Oliver Kirner, Stefanie Kremser, Ulrike Langematz, Jared Lewis, Marion Marchand, Meiyun Lin, Eva Mancini, Virginie Marécal, Martine Michou, Olaf Morgenstern, Fiona M. O'Connor, Luke Oman, Giovanni Pitari, David A. Plummer, John A. Pyle, Laura E. Revell, Eugene Rozanov, Robyn Schofield, Andrea Stenke, Kane Stone, Kengo Sudo, Simone Tilmes, Daniele Visioni, Yousuke Yamashita, and Guang Zeng
Atmos. Chem. Phys., 18, 8409–8438, https://doi.org/10.5194/acp-18-8409-2018, https://doi.org/10.5194/acp-18-8409-2018, 2018
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We analyse simulations from the Chemistry-Climate Model Initiative (CCMI) to estimate the return dates of the stratospheric ozone layer from depletion by anthropogenic chlorine and bromine. The simulations from 20 models project that global column ozone will return to 1980 values in 2047 (uncertainty range 2042–2052). Return dates in other regions vary depending on factors related to climate change and importance of chlorine and bromine. Column ozone in the tropics may continue to decline.
Stefan Lossow, Dale F. Hurst, Karen H. Rosenlof, Gabriele P. Stiller, Thomas von Clarmann, Sabine Brinkop, Martin Dameris, Patrick Jöckel, Doug E. Kinnison, Johannes Plieninger, David A. Plummer, Felix Ploeger, William G. Read, Ellis E. Remsberg, James M. Russell, and Mengchu Tao
Atmos. Chem. Phys., 18, 8331–8351, https://doi.org/10.5194/acp-18-8331-2018, https://doi.org/10.5194/acp-18-8331-2018, 2018
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Trend estimates of lower stratospheric H2O derived from the FPH observations at Boulder and a merged zonal mean satellite data set clearly differ for the time period from the late 1980s to 2010. We investigate if a sampling bias between Boulder and the zonal mean around the Boulder latitude can explain these trend discrepancies. Typically they are small and not sufficient to explain the trend discrepancies in the observational database.
Ronald G. Prinn, Ray F. Weiss, Jgor Arduini, Tim Arnold, H. Langley DeWitt, Paul J. Fraser, Anita L. Ganesan, Jimmy Gasore, Christina M. Harth, Ove Hermansen, Jooil Kim, Paul B. Krummel, Shanlan Li, Zoë M. Loh, Chris R. Lunder, Michela Maione, Alistair J. Manning, Ben R. Miller, Blagoj Mitrevski, Jens Mühle, Simon O'Doherty, Sunyoung Park, Stefan Reimann, Matt Rigby, Takuya Saito, Peter K. Salameh, Roland Schmidt, Peter G. Simmonds, L. Paul Steele, Martin K. Vollmer, Ray H. Wang, Bo Yao, Yoko Yokouchi, Dickon Young, and Lingxi Zhou
Earth Syst. Sci. Data, 10, 985–1018, https://doi.org/10.5194/essd-10-985-2018, https://doi.org/10.5194/essd-10-985-2018, 2018
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We present the data and accomplishments of the multinational global atmospheric measurement program AGAGE (Advanced Global Atmospheric Gases Experiment). At high frequency and at multiple sites, AGAGE measures all the important chemicals in the Montreal Protocol for the protection of the ozone layer and the non-carbon-dioxide gases assessed by the Intergovernmental Panel on Climate Change. AGAGE uses these data to estimate sources and sinks of all these gases and has operated since 1978.
Clara Orbe, Huang Yang, Darryn W. Waugh, Guang Zeng, Olaf Morgenstern, Douglas E. Kinnison, Jean-Francois Lamarque, Simone Tilmes, David A. Plummer, John F. Scinocca, Beatrice Josse, Virginie Marecal, Patrick Jöckel, Luke D. Oman, Susan E. Strahan, Makoto Deushi, Taichu Y. Tanaka, Kohei Yoshida, Hideharu Akiyoshi, Yousuke Yamashita, Andreas Stenke, Laura Revell, Timofei Sukhodolov, Eugene Rozanov, Giovanni Pitari, Daniele Visioni, Kane A. Stone, Robyn Schofield, and Antara Banerjee
Atmos. Chem. Phys., 18, 7217–7235, https://doi.org/10.5194/acp-18-7217-2018, https://doi.org/10.5194/acp-18-7217-2018, 2018
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In this study we compare a few atmospheric transport properties among several numerical models that are used to study the influence of atmospheric chemistry on climate. We show that there are large differences among models in terms of the timescales that connect the Northern Hemisphere midlatitudes, where greenhouse gases and ozone-depleting substances are emitted, to the Southern Hemisphere. Our results may have important implications for how models represent atmospheric composition.
Simone Dietmüller, Roland Eichinger, Hella Garny, Thomas Birner, Harald Boenisch, Giovanni Pitari, Eva Mancini, Daniele Visioni, Andrea Stenke, Laura Revell, Eugene Rozanov, David A. Plummer, John Scinocca, Patrick Jöckel, Luke Oman, Makoto Deushi, Shibata Kiyotaka, Douglas E. Kinnison, Rolando Garcia, Olaf Morgenstern, Guang Zeng, Kane Adam Stone, and Robyn Schofield
Atmos. Chem. Phys., 18, 6699–6720, https://doi.org/10.5194/acp-18-6699-2018, https://doi.org/10.5194/acp-18-6699-2018, 2018
Martin G. Schultz, Scarlet Stadtler, Sabine Schröder, Domenico Taraborrelli, Bruno Franco, Jonathan Krefting, Alexandra Henrot, Sylvaine Ferrachat, Ulrike Lohmann, David Neubauer, Colombe Siegenthaler-Le Drian, Sebastian Wahl, Harri Kokkola, Thomas Kühn, Sebastian Rast, Hauke Schmidt, Philip Stier, Doug Kinnison, Geoffrey S. Tyndall, John J. Orlando, and Catherine Wespes
Geosci. Model Dev., 11, 1695–1723, https://doi.org/10.5194/gmd-11-1695-2018, https://doi.org/10.5194/gmd-11-1695-2018, 2018
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The chemistry–climate model ECHAM-HAMMOZ contains a detailed representation of tropospheric and stratospheric reactive chemistry and state-of-the-art parameterizations of aerosols. It thus allows for detailed investigations of chemical processes in the climate system. Evaluation of the model with various observational data yields good results, but the model has a tendency to produce too much OH in the tropics. This highlights the important interplay between atmospheric chemistry and dynamics.
Fernando Iglesias-Suarez, Douglas E. Kinnison, Alexandru Rap, Amanda C. Maycock, Oliver Wild, and Paul J. Young
Atmos. Chem. Phys., 18, 6121–6139, https://doi.org/10.5194/acp-18-6121-2018, https://doi.org/10.5194/acp-18-6121-2018, 2018
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This study explores future ozone radiative forcing (RF) and the relative contribution due to different drivers. Climate-induced ozone RF is largely the result of the interplay between lightning-produced ozone and enhanced ozone destruction in a warmer and wetter atmosphere. These results demonstrate the importance of stratospheric–tropospheric interactions and the stratosphere as a key region controlling a large fraction of the tropospheric ozone RF.
Peter G. Simmonds, Matthew Rigby, Archie McCulloch, Martin K. Vollmer, Stephan Henne, Jens Mühle, Simon O'Doherty, Alistair J. Manning, Paul B. Krummel, Paul J. Fraser, Dickon Young, Ray F. Weiss, Peter K. Salameh, Christina M. Harth, Stefan Reimann, Cathy M. Trudinger, L. Paul Steele, Ray H. J. Wang, Diane J. Ivy, Ronald G. Prinn, Blagoj Mitrevski, and David M. Etheridge
Atmos. Chem. Phys., 18, 4153–4169, https://doi.org/10.5194/acp-18-4153-2018, https://doi.org/10.5194/acp-18-4153-2018, 2018
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Recent measurements of the potent greenhouse gas HFC-23, a by-product of HCFC-22 production, show a 28 % increase in the atmospheric mole fraction from 2009 to 2016. A minimum in the atmospheric abundance of HFC-23 in 2009 was attributed to abatement of HFC-23 emissions by incineration under the Clean Development Mechanism (CDM). Our results indicate that the recent increase in HFC-23 emissions is driven by failure of mitigation under the CDM to keep pace with increased HCFC-22 production.
William T. Ball, Justin Alsing, Daniel J. Mortlock, Johannes Staehelin, Joanna D. Haigh, Thomas Peter, Fiona Tummon, Rene Stübi, Andrea Stenke, John Anderson, Adam Bourassa, Sean M. Davis, Doug Degenstein, Stacey Frith, Lucien Froidevaux, Chris Roth, Viktoria Sofieva, Ray Wang, Jeannette Wild, Pengfei Yu, Jerald R. Ziemke, and Eugene V. Rozanov
Atmos. Chem. Phys., 18, 1379–1394, https://doi.org/10.5194/acp-18-1379-2018, https://doi.org/10.5194/acp-18-1379-2018, 2018
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Using a robust analysis, with artefact-corrected ozone data, we confirm upper stratospheric ozone is recovering following the Montreal Protocol, but that lower stratospheric ozone (50° S–50° N) has continued to decrease since 1998, and the ozone layer as a whole (60° S–60° N) may be lower today than in 1998. No change in total column ozone may be due to increasing tropospheric ozone. State-of-the-art models do not reproduce lower stratospheric ozone decreases.
Niall J. Ryan, Douglas E. Kinnison, Rolando R. Garcia, Christoph G. Hoffmann, Mathias Palm, Uwe Raffalski, and Justus Notholt
Atmos. Chem. Phys., 18, 1457–1474, https://doi.org/10.5194/acp-18-1457-2018, https://doi.org/10.5194/acp-18-1457-2018, 2018
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We used model output and instrument data to assess how well polar atmospheric descent rates can be derived using concentration measurements of long-lived gases in the atmosphere. The results indicate that the method incurs errors as large as the descent rates, and often leads to a misinterpretation of the direction of air motion. The rates derived using this method do not appear to represent the mean vertical wind in the middle atmosphere, and we suggest an alternate definition.
Olaf Morgenstern, Kane A. Stone, Robyn Schofield, Hideharu Akiyoshi, Yousuke Yamashita, Douglas E. Kinnison, Rolando R. Garcia, Kengo Sudo, David A. Plummer, John Scinocca, Luke D. Oman, Michael E. Manyin, Guang Zeng, Eugene Rozanov, Andrea Stenke, Laura E. Revell, Giovanni Pitari, Eva Mancini, Glauco Di Genova, Daniele Visioni, Sandip S. Dhomse, and Martyn P. Chipperfield
Atmos. Chem. Phys., 18, 1091–1114, https://doi.org/10.5194/acp-18-1091-2018, https://doi.org/10.5194/acp-18-1091-2018, 2018
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We assess how ozone as simulated by a group of chemistry–climate models responds to variations in man-made climate gases and ozone-depleting substances. We find some agreement, particularly in the middle and upper stratosphere, but also considerable disagreement elsewhere. Such disagreement affects the reliability of future ozone projections based on these models, and also constitutes a source of uncertainty in climate projections using prescribed ozone derived from these simulations.
Martin K. Vollmer, Dickon Young, Cathy M. Trudinger, Jens Mühle, Stephan Henne, Matthew Rigby, Sunyoung Park, Shanlan Li, Myriam Guillevic, Blagoj Mitrevski, Christina M. Harth, Benjamin R. Miller, Stefan Reimann, Bo Yao, L. Paul Steele, Simon A. Wyss, Chris R. Lunder, Jgor Arduini, Archie McCulloch, Songhao Wu, Tae Siek Rhee, Ray H. J. Wang, Peter K. Salameh, Ove Hermansen, Matthias Hill, Ray L. Langenfelds, Diane Ivy, Simon O'Doherty, Paul B. Krummel, Michela Maione, David M. Etheridge, Lingxi Zhou, Paul J. Fraser, Ronald G. Prinn, Ray F. Weiss, and Peter G. Simmonds
Atmos. Chem. Phys., 18, 979–1002, https://doi.org/10.5194/acp-18-979-2018, https://doi.org/10.5194/acp-18-979-2018, 2018
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We measured the three chlorofluorocarbons (CFCs) CFC-13, CFC-114, and CFC-115 in the atmosphere because they are important in stratospheric ozone depletion. These compounds should have decreased in the atmosphere because they are banned by the Montreal Protocol but we find the opposite. Emissions over the last decade have not declined on a global scale. We use inverse modeling and our observations to find that a large part of the emissions originate in the Asian region.
Justin Bandoro, Susan Solomon, Benjamin D. Santer, Douglas E. Kinnison, and Michael J. Mills
Atmos. Chem. Phys., 18, 143–166, https://doi.org/10.5194/acp-18-143-2018, https://doi.org/10.5194/acp-18-143-2018, 2018
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We studied the attribution of stratospheric ozone changes and identified similarities between observations and human fingerprints from both emissions of ozone-depleting substances (ODSs) and greenhouse gases (GHGs). We developed an improvement on the traditional pattern correlation method that accounts for nonlinearities in the climate forcing time evolution. Use of the latter resulted in increased S / N ratios for the ODS fingerprint. The GHG fingerprint was not identifiable.
Theodore K. Koenig, Rainer Volkamer, Sunil Baidar, Barbara Dix, Siyuan Wang, Daniel C. Anderson, Ross J. Salawitch, Pamela A. Wales, Carlos A. Cuevas, Rafael P. Fernandez, Alfonso Saiz-Lopez, Mathew J. Evans, Tomás Sherwen, Daniel J. Jacob, Johan Schmidt, Douglas Kinnison, Jean-François Lamarque, Eric C. Apel, James C. Bresch, Teresa Campos, Frank M. Flocke, Samuel R. Hall, Shawn B. Honomichl, Rebecca Hornbrook, Jørgen B. Jensen, Richard Lueb, Denise D. Montzka, Laura L. Pan, J. Michael Reeves, Sue M. Schauffler, Kirk Ullmann, Andrew J. Weinheimer, Elliot L. Atlas, Valeria Donets, Maria A. Navarro, Daniel Riemer, Nicola J. Blake, Dexian Chen, L. Gregory Huey, David J. Tanner, Thomas F. Hanisco, and Glenn M. Wolfe
Atmos. Chem. Phys., 17, 15245–15270, https://doi.org/10.5194/acp-17-15245-2017, https://doi.org/10.5194/acp-17-15245-2017, 2017
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Tropospheric inorganic bromine (BrO and Bry) shows a C-shaped profile over the tropical western Pacific Ocean, and supports previous speculation that marine convection is a source for inorganic bromine from sea salt to the upper troposphere. The Bry profile in the tropical tropopause layer (TTL) is complex, suggesting that the total Bry budget in the TTL is not closed without considering aerosol bromide. The implications for atmospheric composition and bromine sources are discussed.
Gerald E. Nedoluha, Michael Kiefer, Stefan Lossow, R. Michael Gomez, Niklaus Kämpfer, Martin Lainer, Peter Forkman, Ole Martin Christensen, Jung Jin Oh, Paul Hartogh, John Anderson, Klaus Bramstedt, Bianca M. Dinelli, Maya Garcia-Comas, Mark Hervig, Donal Murtagh, Piera Raspollini, William G. Read, Karen Rosenlof, Gabriele P. Stiller, and Kaley A. Walker
Atmos. Chem. Phys., 17, 14543–14558, https://doi.org/10.5194/acp-17-14543-2017, https://doi.org/10.5194/acp-17-14543-2017, 2017
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As part of the second SPARC (Stratosphere–troposphere Processes And their Role in Climate) water vapor assessment (WAVAS-II), we present measurements taken from or coincident with seven sites from which ground-based microwave instruments measure water vapor in the middle atmosphere. In the lower mesosphere, we quantify instrumental differences in the observed trends and annual variations at six sites. We then present a range of observed trends in water vapor over the past 20 years.
Farahnaz Khosrawi, Oliver Kirner, Björn-Martin Sinnhuber, Sören Johansson, Michael Höpfner, Michelle L. Santee, Lucien Froidevaux, Jörn Ungermann, Roland Ruhnke, Wolfgang Woiwode, Hermann Oelhaf, and Peter Braesicke
Atmos. Chem. Phys., 17, 12893–12910, https://doi.org/10.5194/acp-17-12893-2017, https://doi.org/10.5194/acp-17-12893-2017, 2017
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The 2015/2016 Arctic winter was one of the coldest winters in recent years, allowing extensive PSC formation and chlorine activation. Model simulations of the 2015/2016 Arctic winter were performed with the atmospheric chemistry–climate model ECHAM5/MESSy Atmospheric Chemistry (EMAC). We find that ozone loss was quite strong but not as strong as in 2010/2011; denitrification and dehydration were so far the strongest observed in the Arctic stratosphere in at least the past 10 years.
Gloria L. Manney, Michaela I. Hegglin, Zachary D. Lawrence, Krzysztof Wargan, Luis F. Millán, Michael J. Schwartz, Michelle L. Santee, Alyn Lambert, Steven Pawson, Brian W. Knosp, Ryan A. Fuller, and William H. Daffer
Atmos. Chem. Phys., 17, 11541–11566, https://doi.org/10.5194/acp-17-11541-2017, https://doi.org/10.5194/acp-17-11541-2017, 2017
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The upper tropospheric–lower stratospheric (UTLS) jet stream and multiple tropopause distributions are compared among five state-of-the-art reanalyses. The reanalyses show very similar global distributions of UTLS jets, reflecting their overall high quality; slightly larger differences are seen in tropopause characteristics. Regional and seasonal differences, albeit small, may have implications for using these reanalyses for quantitative dynamical and transport studies focusing on the UTLS.
Wolfgang Steinbrecht, Lucien Froidevaux, Ryan Fuller, Ray Wang, John Anderson, Chris Roth, Adam Bourassa, Doug Degenstein, Robert Damadeo, Joe Zawodny, Stacey Frith, Richard McPeters, Pawan Bhartia, Jeannette Wild, Craig Long, Sean Davis, Karen Rosenlof, Viktoria Sofieva, Kaley Walker, Nabiz Rahpoe, Alexei Rozanov, Mark Weber, Alexandra Laeng, Thomas von Clarmann, Gabriele Stiller, Natalya Kramarova, Sophie Godin-Beekmann, Thierry Leblanc, Richard Querel, Daan Swart, Ian Boyd, Klemens Hocke, Niklaus Kämpfer, Eliane Maillard Barras, Lorena Moreira, Gerald Nedoluha, Corinne Vigouroux, Thomas Blumenstock, Matthias Schneider, Omaira García, Nicholas Jones, Emmanuel Mahieu, Dan Smale, Michael Kotkamp, John Robinson, Irina Petropavlovskikh, Neil Harris, Birgit Hassler, Daan Hubert, and Fiona Tummon
Atmos. Chem. Phys., 17, 10675–10690, https://doi.org/10.5194/acp-17-10675-2017, https://doi.org/10.5194/acp-17-10675-2017, 2017
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Thanks to the 1987 Montreal Protocol and its amendments, ozone-depleting chlorine (and bromine) in the stratosphere has declined slowly since the late 1990s. Improved and extended long-term ozone profile observations from satellites and ground-based stations confirm that ozone is responding as expected and has increased by about 2 % per decade since 2000 in the upper stratosphere, around 40 km altitude. At lower altitudes, however, ozone has not changed significantly since 2000.
Maria A. Navarro, Alfonso Saiz-Lopez, Carlos A. Cuevas, Rafael P. Fernandez, Elliot Atlas, Xavier Rodriguez-Lloveras, Douglas Kinnison, Jean-Francois Lamarque, Simone Tilmes, Troy Thornberry, Andrew Rollins, James W. Elkins, Eric J. Hintsa, and Fred L. Moore
Atmos. Chem. Phys., 17, 9917–9930, https://doi.org/10.5194/acp-17-9917-2017, https://doi.org/10.5194/acp-17-9917-2017, 2017
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Inorganic bromine (Bry) plays an important role in ozone layer depletion. Based on aircraft observations of organic bromine species and chemistry simulations, we model the Bry abundances over the Pacific tropical tropopause. Our results show BrO and Br as the dominant species during daytime hours, and BrCl and BrONO2 as the nighttime dominant species over the western and eastern Pacific, respectively. The difference in the partitioning is due to changes in the abundance of O3, NO2, and Cly.
Malte Meinshausen, Elisabeth Vogel, Alexander Nauels, Katja Lorbacher, Nicolai Meinshausen, David M. Etheridge, Paul J. Fraser, Stephen A. Montzka, Peter J. Rayner, Cathy M. Trudinger, Paul B. Krummel, Urs Beyerle, Josep G. Canadell, John S. Daniel, Ian G. Enting, Rachel M. Law, Chris R. Lunder, Simon O'Doherty, Ron G. Prinn, Stefan Reimann, Mauro Rubino, Guus J. M. Velders, Martin K. Vollmer, Ray H. J. Wang, and Ray Weiss
Geosci. Model Dev., 10, 2057–2116, https://doi.org/10.5194/gmd-10-2057-2017, https://doi.org/10.5194/gmd-10-2057-2017, 2017
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Climate change is primarily driven by human-induced increases of greenhouse gas (GHG) concentrations. Based on ongoing community efforts (e.g. AGAGE and NOAA networks, ice cores), this study presents historical concentrations of CO2, CH4, N2O and 40 other GHGs from year 0 to year 2014. The data is recommended as input for climate models for pre-industrial, historical runs under CMIP6. Global means, but also latitudinal by monthly surface concentration fields are provided.
Peter G. Simmonds, Matthew Rigby, Archie McCulloch, Simon O'Doherty, Dickon Young, Jens Mühle, Paul B. Krummel, Paul Steele, Paul J. Fraser, Alistair J. Manning, Ray F. Weiss, Peter K. Salameh, Chris M. Harth, Ray H. J. Wang, and Ronald G. Prinn
Atmos. Chem. Phys., 17, 4641–4655, https://doi.org/10.5194/acp-17-4641-2017, https://doi.org/10.5194/acp-17-4641-2017, 2017
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This paper reports how long-term atmospheric measurements demonstrate that the Montreal Protocol has been effective in controlling production and consumption of the hydrochlorofluorocarbons, a group of industrial chemicals that have detrimental effects on the ozone layer and also contribute to global warming as greenhouse gases and their hydrofluorocarbon substitutes which are also potent greenhouse gases but do not materially affect the ozone layer.
Olaf Morgenstern, Michaela I. Hegglin, Eugene Rozanov, Fiona M. O'Connor, N. Luke Abraham, Hideharu Akiyoshi, Alexander T. Archibald, Slimane Bekki, Neal Butchart, Martyn P. Chipperfield, Makoto Deushi, Sandip S. Dhomse, Rolando R. Garcia, Steven C. Hardiman, Larry W. Horowitz, Patrick Jöckel, Beatrice Josse, Douglas Kinnison, Meiyun Lin, Eva Mancini, Michael E. Manyin, Marion Marchand, Virginie Marécal, Martine Michou, Luke D. Oman, Giovanni Pitari, David A. Plummer, Laura E. Revell, David Saint-Martin, Robyn Schofield, Andrea Stenke, Kane Stone, Kengo Sudo, Taichu Y. Tanaka, Simone Tilmes, Yousuke Yamashita, Kohei Yoshida, and Guang Zeng
Geosci. Model Dev., 10, 639–671, https://doi.org/10.5194/gmd-10-639-2017, https://doi.org/10.5194/gmd-10-639-2017, 2017
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We present a review of the make-up of 20 models participating in the Chemistry–Climate Model Initiative (CCMI). In comparison to earlier such activities, most of these models comprise a whole-atmosphere chemistry, and several of them include an interactive ocean module. This makes them suitable for studying the interactions of tropospheric air quality, stratospheric ozone, and climate. The paper lays the foundation for other studies using the CCMI simulations for scientific analysis.
Rafael P. Fernandez, Douglas E. Kinnison, Jean-Francois Lamarque, Simone Tilmes, and Alfonso Saiz-Lopez
Atmos. Chem. Phys., 17, 1673–1688, https://doi.org/10.5194/acp-17-1673-2017, https://doi.org/10.5194/acp-17-1673-2017, 2017
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The inclusion of biogenic very-short lived bromine (VSLBr) in a chemistry-climate model produces an expansion of the ozone hole area of ~ 5 million km2, which is equivalent in magnitude to the recently estimated Antarctic ozone healing due to the reduction of anthropogenic CFCs and halons. The maximum Antarctic ozone hole depletion increases by up to 14 % when natural VSLBr are considered, but does not introduce a significant delay of the modelled ozone return date to 1980 October levels.
Alfonso Saiz-Lopez, John M. C. Plane, Carlos A. Cuevas, Anoop S. Mahajan, Jean-François Lamarque, and Douglas E. Kinnison
Atmos. Chem. Phys., 16, 15593–15604, https://doi.org/10.5194/acp-16-15593-2016, https://doi.org/10.5194/acp-16-15593-2016, 2016
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Electronic structure calculations are used to survey possible reactions that HOI and I2 could undergo at night in the lower troposphere, and hence reconcile measurements and models. The reactions NO3 + HOI and I2 + NO3 are included in two models to explore a new nocturnal iodine radical activation mechanism, leading to a reduction of nighttime HOI and I2. This chemistry can have a large impact on NO3 levels in the MBL, and hence upon the nocturnal oxidizing capacity of the marine atmosphere.
Jeremy J. Harrison, Martyn P. Chipperfield, Christopher D. Boone, Sandip S. Dhomse, Peter F. Bernath, Lucien Froidevaux, John Anderson, and James Russell III
Atmos. Chem. Phys., 16, 10501–10519, https://doi.org/10.5194/acp-16-10501-2016, https://doi.org/10.5194/acp-16-10501-2016, 2016
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HF, the dominant stratospheric fluorine reservoir, results from the atmospheric degradation of anthropogenic species such as CFCs, HCFCs, and HFCs. All are strong greenhouse gases, and CFCs and HCFCs deplete stratospheric ozone.
We report the comparison of HF global distributions and trends measured by the ACE-FTS and HALOE satellite instruments with the output of SLIMCAT, a chemical transport model. The global HF trends reveal a slowing down in the rate of increase of HF since the 1990s.
Simone Tilmes, Jean-Francois Lamarque, Louisa K. Emmons, Doug E. Kinnison, Dan Marsh, Rolando R. Garcia, Anne K. Smith, Ryan R. Neely, Andrew Conley, Francis Vitt, Maria Val Martin, Hiroshi Tanimoto, Isobel Simpson, Don R. Blake, and Nicola Blake
Geosci. Model Dev., 9, 1853–1890, https://doi.org/10.5194/gmd-9-1853-2016, https://doi.org/10.5194/gmd-9-1853-2016, 2016
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The state of the art Community Earth System Model, CESM1 CAM4-chem has been used to perform reference and sensitivity simulations as part of the Chemistry Climate Model Initiative (CCMI). Specifics of the model and details regarding the setup of the simulations are described. In additions, the main behavior of the model, including selected chemical species have been evaluated with climatological datasets. This paper is therefore a references for studies that use the provided model results.
Charles H. Jackman, Daniel R. Marsh, Douglas E. Kinnison, Christopher J. Mertens, and Eric L. Fleming
Atmos. Chem. Phys., 16, 5853–5866, https://doi.org/10.5194/acp-16-5853-2016, https://doi.org/10.5194/acp-16-5853-2016, 2016
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Two global models were used to investigate the impact of galactic cosmic ray (GCRs) on the atmosphere over the 1960-2010 time period. The primary impact of the naturally occurring GCRs on ozone was found to be due to their production of NOx and this impact varies with the atmospheric chlorine loading, sulfate aerosol loading, and solar cycle variation. GCR-caused decreases of annual average global total ozone were computed to be 0.2 % or less.
Sean Coburn, Barbara Dix, Eric Edgerton, Christopher D. Holmes, Douglas Kinnison, Qing Liang, Arnout ter Schure, Siyuan Wang, and Rainer Volkamer
Atmos. Chem. Phys., 16, 3743–3760, https://doi.org/10.5194/acp-16-3743-2016, https://doi.org/10.5194/acp-16-3743-2016, 2016
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Here we present a day of case study measurements of the vertical distribution of bromine monoxide over the coastal region of the Gulf of Mexico. These measurements are used to assess the contribution of bromine radicals to the oxidation of elemental mercury in the troposphere. We find that the measured levels of bromine in the troposphere are sufficient to quickly oxidize mercury, which has significant implications for our understanding of atmospheric mercury processes.
S. Tegtmeier, M. I. Hegglin, J. Anderson, B. Funke, J. Gille, A. Jones, L. Smith, T. von Clarmann, and K. A. Walker
Earth Syst. Sci. Data, 8, 61–78, https://doi.org/10.5194/essd-8-61-2016, https://doi.org/10.5194/essd-8-61-2016, 2016
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The first comprehensive intercomparison of CFC-11, CFC-12, HF, and SF6 satellite data was performed as part of the SPARC Data Initiative following a new "top-down" concept of satellite measurement validation and thus providing a global picture of the data characteristics. The comparisons will provide basic information on quality and consistency of the various data sets and will serve as a guide for their use in empirical studies of climate and variability, and in model-measurement comparisons.
M. Gil-Ojeda, M. Navarro-Comas, L. Gómez-Martín, J. A. Adame, A. Saiz-Lopez, C. A. Cuevas, Y. González, O. Puentedura, E. Cuevas, J.-F. Lamarque, D. Kinninson, and S. Tilmes
Atmos. Chem. Phys., 15, 10567–10579, https://doi.org/10.5194/acp-15-10567-2015, https://doi.org/10.5194/acp-15-10567-2015, 2015
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The NO2 seasonal evolution in the free troposphere (FT) has been established for the first time, based on a remote sensing technique (MAXDOAS) and thus avoiding the problems of the local pollution of in situ instruments. A clear seasonality has been found, with background levels of 20-40pptv. Evidence has been found on fast, direct injection of surface air into the free troposphere. This result might have implications on the FT distribution of halogens and other species with marine sources.
L. Froidevaux, J. Anderson, H.-J. Wang, R. A. Fuller, M. J. Schwartz, M. L. Santee, N. J. Livesey, H. C. Pumphrey, P. F. Bernath, J. M. Russell III, and M. P. McCormick
Atmos. Chem. Phys., 15, 10471–10507, https://doi.org/10.5194/acp-15-10471-2015, https://doi.org/10.5194/acp-15-10471-2015, 2015
N. R. P. Harris, B. Hassler, F. Tummon, G. E. Bodeker, D. Hubert, I. Petropavlovskikh, W. Steinbrecht, J. Anderson, P. K. Bhartia, C. D. Boone, A. Bourassa, S. M. Davis, D. Degenstein, A. Delcloo, S. M. Frith, L. Froidevaux, S. Godin-Beekmann, N. Jones, M. J. Kurylo, E. Kyrölä, M. Laine, S. T. Leblanc, J.-C. Lambert, B. Liley, E. Mahieu, A. Maycock, M. de Mazière, A. Parrish, R. Querel, K. H. Rosenlof, C. Roth, C. Sioris, J. Staehelin, R. S. Stolarski, R. Stübi, J. Tamminen, C. Vigouroux, K. A. Walker, H. J. Wang, J. Wild, and J. M. Zawodny
Atmos. Chem. Phys., 15, 9965–9982, https://doi.org/10.5194/acp-15-9965-2015, https://doi.org/10.5194/acp-15-9965-2015, 2015
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Trends in the vertical distribution of ozone are reported for new and recently revised data sets. The amount of ozone-depleting compounds in the stratosphere peaked in the second half of the 1990s. We examine the trends before and after that peak to see if any change in trend is discernible. The previously reported decreases are confirmed. Furthermore, the downward trend in upper stratospheric ozone has not continued. The possible significance of any increase is discussed in detail.
S. Tilmes, J.-F. Lamarque, L. K. Emmons, D. E. Kinnison, P.-L. Ma, X. Liu, S. Ghan, C. Bardeen, S. Arnold, M. Deeter, F. Vitt, T. Ryerson, J. W. Elkins, F. Moore, J. R. Spackman, and M. Val Martin
Geosci. Model Dev., 8, 1395–1426, https://doi.org/10.5194/gmd-8-1395-2015, https://doi.org/10.5194/gmd-8-1395-2015, 2015
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The Community Atmosphere Model (CAM), version 5, is now coupled to extensive tropospheric and stratospheric chemistry, called CAM5-chem, and is available in addition to CAM4-chem in the Community Earth System Model (CESM) version 1.2. Both configurations are well suited as tools for atmospheric chemistry modeling studies in the troposphere and lower stratosphere.
L. Millán, S. Wang, N. Livesey, D. Kinnison, H. Sagawa, and Y. Kasai
Atmos. Chem. Phys., 15, 2889–2902, https://doi.org/10.5194/acp-15-2889-2015, https://doi.org/10.5194/acp-15-2889-2015, 2015
P. Hess, D. Kinnison, and Q. Tang
Atmos. Chem. Phys., 15, 2341–2365, https://doi.org/10.5194/acp-15-2341-2015, https://doi.org/10.5194/acp-15-2341-2015, 2015
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Using a series of model simulations, we find that at widespread NH extratropical locations, interannual tropospheric ozone variability is largely determined by the transport of ozone from the stratosphere. This has implications in the interpretation of measured tropospheric ozone variability in light of changes in the emissions of ozone precursors and in the response of tropospheric ozone to climate change.
C. Prados-Roman, C. A. Cuevas, R. P. Fernandez, D. E. Kinnison, J-F. Lamarque, and A. Saiz-Lopez
Atmos. Chem. Phys., 15, 2215–2224, https://doi.org/10.5194/acp-15-2215-2015, https://doi.org/10.5194/acp-15-2215-2015, 2015
T. Sakazaki, M. Shiotani, M. Suzuki, D. Kinnison, J. M. Zawodny, M. McHugh, and K. A. Walker
Atmos. Chem. Phys., 15, 829–843, https://doi.org/10.5194/acp-15-829-2015, https://doi.org/10.5194/acp-15-829-2015, 2015
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The solar occultation measurements measure the atmosphere at sunrise (SR) and sunset (SS). It has been reported that there is a significant difference in the observed amount of stratospheric ozone between SR and SS. This study first revealed that this difference can be largely explained by diurnal variations in ozone, particularly those caused by vertical transport by the atmospheric tidal winds. Our results would be helpful for the construction of combined data sets from SR and SS profiles.
C. Prados-Roman, C. A. Cuevas, T. Hay, R. P. Fernandez, A. S. Mahajan, S.-J. Royer, M. Galí, R. Simó, J. Dachs, K. Großmann, D. E. Kinnison, J.-F. Lamarque, and A. Saiz-Lopez
Atmos. Chem. Phys., 15, 583–593, https://doi.org/10.5194/acp-15-583-2015, https://doi.org/10.5194/acp-15-583-2015, 2015
R. P. Fernandez, R. J. Salawitch, D. E. Kinnison, J.-F. Lamarque, and A. Saiz-Lopez
Atmos. Chem. Phys., 14, 13391–13410, https://doi.org/10.5194/acp-14-13391-2014, https://doi.org/10.5194/acp-14-13391-2014, 2014
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We propose the existence of a daytime “tropical ring of atomic bromine” surrounding the tropics at a height between 15 and 19km. Our simulations show that VSL bromocarbons produce increases of 3pptv for inorganic bromine and 2pptv for organic bromine in the tropical TTL on an annual average, resulting in a total stratospheric bromine injection of 5pptv. This result suggests that the inorganic bromine injected into the stratosphere may be larger than that from VSL bromocarbons.
A. Saiz-Lopez, R. P. Fernandez, C. Ordóñez, D. E. Kinnison, J. C. Gómez Martín, J.-F. Lamarque, and S. Tilmes
Atmos. Chem. Phys., 14, 13119–13143, https://doi.org/10.5194/acp-14-13119-2014, https://doi.org/10.5194/acp-14-13119-2014, 2014
T. Wang, W. J. Randel, A. E. Dessler, M. R. Schoeberl, and D. E. Kinnison
Atmos. Chem. Phys., 14, 7135–7147, https://doi.org/10.5194/acp-14-7135-2014, https://doi.org/10.5194/acp-14-7135-2014, 2014
M. Abalos, W. J. Randel, D. E. Kinnison, and E. Serrano
Atmos. Chem. Phys., 13, 10591–10607, https://doi.org/10.5194/acp-13-10591-2013, https://doi.org/10.5194/acp-13-10591-2013, 2013
F. Khosrawi, R. Müller, J. Urban, M. H. Proffitt, G. Stiller, M. Kiefer, S. Lossow, D. Kinnison, F. Olschewski, M. Riese, and D. Murtagh
Atmos. Chem. Phys., 13, 3619–3641, https://doi.org/10.5194/acp-13-3619-2013, https://doi.org/10.5194/acp-13-3619-2013, 2013
Related subject area
Subject: Gases | Research Activity: Atmospheric Modelling and Data Analysis | Altitude Range: Stratosphere | Science Focus: Chemistry (chemical composition and reactions)
Correction of stratospheric age of air (AoA) derived from sulfur hexafluoride (SF6) for the effect of chemical sinks
Opinion: Stratospheric ozone – depletion, recovery and new challenges
Quantum yields of CHDO above 300 nm
Sensitivities of atmospheric composition and climate to altitude and latitude of hypersonic aircraft emissions
Analysis of a newly homogenised ozonesonde dataset from Lauder, New Zealand
Atmospheric impacts of chlorinated very short-lived substances over the recent past – Part 2: Impacts on ozone
N2O as a regression proxy for dynamical variability in stratospheric trace gas trends
The influence of future changes in springtime Arctic ozone on stratospheric and surface climate
Weakening of springtime Arctic ozone depletion with climate change
The impact of an extreme solar event on the middle atmosphere: a case study
The future ozone trends in changing climate simulated with SOCOLv4
Atmospheric distribution of HCN from satellite observations and 3-D model simulations
Indicators of the ozone recovery for selected sites in the Northern Hemisphere mid-latitudes derived from various total column ozone datasets (1980–2020)
The historical ozone trends simulated with the SOCOLv4 and their comparison with observations and reanalyses
Atmospheric impacts of chlorinated very short-lived substances over the recent past – Part 1: Stratospheric chlorine budget and the role of transport
Effects of reanalysis forcing fields on ozone trends and age of air from a chemical transport model
The influence of energetic particle precipitation on Antarctic stratospheric chlorine and ozone over the 20th century
From the middle stratosphere to the surface, using nitrous oxide to constrain the stratosphere–troposphere exchange of ozone
An Arctic ozone hole in 2020 if not for the Montreal Protocol
Effects of enhanced downwelling of NOx on Antarctic upper-stratospheric ozone in the 21st century
Processes influencing lower stratospheric water vapour in monsoon anticyclones: insights from Lagrangian modelling
Evaluating stratospheric ozone and water vapour changes in CMIP6 models from 1850 to 2100
Slow feedbacks resulting from strongly enhanced atmospheric methane mixing ratios in a chemistry–climate model with mixed-layer ocean
Impact of the eruption of Mt Pinatubo on the chemical composition of the stratosphere
Projecting ozone hole recovery using an ensemble of chemistry–climate models weighted by model performance and independence
Inconsistencies between chemistry–climate models and observed lower stratospheric ozone trends since 1998
Reformulating the bromine alpha factor and equivalent effective stratospheric chlorine (EESC): evolution of ozone destruction rates of bromine and chlorine in future climate scenarios
Analysis and attribution of total column ozone changes over the Tibetan Plateau during 1979–2017
Seasonal impact of biogenic very short-lived bromocarbons on lowermost stratospheric ozone between 60° N and 60° S during the 21st century
Modelling the potential impacts of the recent, unexpected increase in CFC-11 emissions on total column ozone recovery
The potential impacts of a sulfur- and halogen-rich supereruption such as Los Chocoyos on the atmosphere and climate
Technical note: Intermittent reduction of the stratospheric ozone over northern Europe caused by a storm in the Atlantic Ocean
Possible implications of enhanced chlorofluorocarbon-11 concentrations on ozone
Technical note: Reanalysis of Aura MLS chemical observations
Separating the role of direct radiative heating and photolysis in modulating the atmospheric response to the amplitude of the 11-year solar cycle forcing
Reactive nitrogen (NOy) and ozone responses to energetic electron precipitation during Southern Hemisphere winter
Implication of strongly increased atmospheric methane concentrations for chemistry–climate connections
Multitimescale variations in modeled stratospheric water vapor derived from three modern reanalysis products
How robust are stratospheric age of air trends from different reanalyses?
Chlorine nitrate in the atmosphere
Linking uncertainty in simulated Arctic ozone loss to uncertainties in modelled tropical stratospheric water vapour
Importance of seasonally resolved oceanic emissions for bromoform delivery from the tropical Indian Ocean and west Pacific to the stratosphere
The representation of solar cycle signals in stratospheric ozone – Part 2: Analysis of global models
Investigating the yield of H2O and H2 from methane oxidation in the stratosphere
Comparison of ECHAM5/MESSy Atmospheric Chemistry (EMAC) simulations of the Arctic winter 2009/2010 and 2010/2011 with Envisat/MIPAS and Aura/MLS observations
On the discrepancy of HCl processing in the core of the wintertime polar vortices
Estimates of ozone return dates from Chemistry-Climate Model Initiative simulations
Trend differences in lower stratospheric water vapour between Boulder and the zonal mean and their role in understanding fundamental observational discrepancies
On ozone trend detection: using coupled chemistry–climate simulations to investigate early signs of total column ozone recovery
Future changes in the stratosphere-to-troposphere ozone mass flux and the contribution from climate change and ozone recovery
Hella Garny, Roland Eichinger, Johannes C. Laube, Eric A. Ray, Gabriele P. Stiller, Harald Bönisch, Laura Saunders, and Marianna Linz
Atmos. Chem. Phys., 24, 4193–4215, https://doi.org/10.5194/acp-24-4193-2024, https://doi.org/10.5194/acp-24-4193-2024, 2024
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Transport circulation in the stratosphere is important for the distribution of tracers, but its strength is hard to measure. Mean transport times can be inferred from observations of trace gases with certain properties, such as sulfur hexafluoride (SF6). However, this gas has a chemical sink in the high atmosphere, which can lead to substantial biases in inferred transport times. In this paper we present a method to correct mean transport times derived from SF6 for the effects of chemical sinks.
Martyn P. Chipperfield and Slimane Bekki
Atmos. Chem. Phys., 24, 2783–2802, https://doi.org/10.5194/acp-24-2783-2024, https://doi.org/10.5194/acp-24-2783-2024, 2024
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We give a personal perspective on recent issues related to the depletion of stratospheric ozone and some newly emerging challenges. We first provide a brief review of historic work on understanding the ozone layer and review ozone recovery from the effects of halogenated source gases and the Montreal Protocol. We then discuss the recent observations of ozone depletion from Australian fires in early 2020 and the Hunga Tonga–Hunga Ha'apai volcano in January 2022.
Ernst-Peter Röth and Luc Vereecken
Atmos. Chem. Phys., 24, 2625–2638, https://doi.org/10.5194/acp-24-2625-2024, https://doi.org/10.5194/acp-24-2625-2024, 2024
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The paper presents the radical and molecular product quantum yields in the photolysis reaction of CHDO at wavelengths above 300 nm. Two different approaches based on literature data are used, with results falling within both approaches' uncertainty ranges. Simple functional forms are presented for use in photochemical models of the atmosphere.
Johannes Pletzer and Volker Grewe
Atmos. Chem. Phys., 24, 1743–1775, https://doi.org/10.5194/acp-24-1743-2024, https://doi.org/10.5194/acp-24-1743-2024, 2024
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Very fast aircraft can travel at 30–40 km altitude and are designed to use liquid hydrogen as fuel instead of kerosene. Depending on their flight altitude, the impact of these aircraft on the atmosphere and climate can change very much. Our results show that a variation inflight latitude can have a considerably higher change in impact compared to a variation in flight altitude. Atmospheric air transport and polar stratospheric clouds play an important role in hypersonic aircraft emissions.
Guang Zeng, Richard Querel, Hisako Shiona, Deniz Poyraz, Roeland Van Malderen, Alex Geddes, Penny Smale, Dan Smale, John Robinson, and Olaf Morgenstern
EGUsphere, https://doi.org/10.5194/egusphere-2023-2534, https://doi.org/10.5194/egusphere-2023-2534, 2023
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We present a homogenised ozonesonde record (1987–2020) for Lauder, New Zealand, identify factors driving ozone trends, and attribute them to anthropogenic forcings using statistical analysis and model simulations. We find that significant negative stratospheric ozone trends identified at Lauder are associated with an increase in tropopause height and that CO2-driven dynamical changes have had an increasingly important role in driving ozone trends, offsetting effects of methane and nitrous oxide.
Ewa M. Bednarz, Ryan Hossaini, and Martyn P. Chipperfield
Atmos. Chem. Phys., 23, 13701–13711, https://doi.org/10.5194/acp-23-13701-2023, https://doi.org/10.5194/acp-23-13701-2023, 2023
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We quantify, for the first time, the time-varying impact of uncontrolled emissions of chlorinated very short-lived substances (Cl-VSLSs) on stratospheric ozone using a state-of-the-art chemistry-climate model. We demonstrate that Cl-VSLSs already have a non-negligible impact on stratospheric ozone, including a local reduction of up to ~7 DU in Arctic ozone in the cold winter of 2019/20, and any so future growth in emissions will continue to offset some of the benefits of the Montreal Protocol.
Kimberlee Dubé, Susann Tegtmeier, Adam Bourassa, Daniel Zawada, Douglas Degenstein, Patrick E. Sheese, Kaley A. Walker, and William Randel
Atmos. Chem. Phys., 23, 13283–13300, https://doi.org/10.5194/acp-23-13283-2023, https://doi.org/10.5194/acp-23-13283-2023, 2023
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This paper presents a technique for understanding the causes of long-term changes in stratospheric composition. By using N2O as a proxy for stratospheric circulation in the model used to calculated trends, it is possible to separate the effects of dynamics and chemistry on observed trace gas trends. We find that observed HCl increases are due to changes in the stratospheric circulation, as are O3 decreases above 30 hPa in the Northern Hemisphere.
Gabriel Chiodo, Marina Friedel, Svenja Seeber, Daniela Domeisen, Andrea Stenke, Timofei Sukhodolov, and Franziska Zilker
Atmos. Chem. Phys., 23, 10451–10472, https://doi.org/10.5194/acp-23-10451-2023, https://doi.org/10.5194/acp-23-10451-2023, 2023
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Stratospheric ozone protects the biosphere from harmful UV radiation. Anthropogenic activity has led to a reduction in the ozone layer in the recent past, but thanks to the implementation of the Montreal Protocol, the ozone layer is projected to recover. In this study, we show that projected future changes in Arctic ozone abundances during springtime will influence stratospheric climate and thereby actively modulate large-scale circulation changes in the Northern Hemisphere.
Marina Friedel, Gabriel Chiodo, Timofei Sukhodolov, James Keeble, Thomas Peter, Svenja Seeber, Andrea Stenke, Hideharu Akiyoshi, Eugene Rozanov, David Plummer, Patrick Jöckel, Guang Zeng, Olaf Morgenstern, and Béatrice Josse
Atmos. Chem. Phys., 23, 10235–10254, https://doi.org/10.5194/acp-23-10235-2023, https://doi.org/10.5194/acp-23-10235-2023, 2023
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Previously, it has been suggested that springtime Arctic ozone depletion might worsen in the coming decades due to climate change, which might counteract the effect of reduced ozone-depleting substances. Here, we show with different chemistry–climate models that springtime Arctic ozone depletion will likely decrease in the future. Further, we explain why models show a large spread in the projected development of Arctic ozone depletion and use the model spread to constrain future projections.
Thomas Reddmann, Miriam Sinnhuber, Jan Maik Wissing, Olesya Yakovchuk, and Ilya Usoskin
Atmos. Chem. Phys., 23, 6989–7000, https://doi.org/10.5194/acp-23-6989-2023, https://doi.org/10.5194/acp-23-6989-2023, 2023
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Recent analyses of isotopic records of ice cores and sediments have shown that very strong explosions may occur on the Sun, perhaps about one such explosion every 1000 years. Such explosions pose a real threat to humankind. It is therefore of great interest to study the impact of such explosions on Earth. We analyzed how the explosions would affect the chemistry of the middle atmosphere and show that the related ozone loss is not dramatic and that the atmosphere will recover within 1 year.
Arseniy Karagodin-Doyennel, Eugene Rozanov, Timofei Sukhodolov, Tatiana Egorova, Jan Sedlacek, and Thomas Peter
Atmos. Chem. Phys., 23, 4801–4817, https://doi.org/10.5194/acp-23-4801-2023, https://doi.org/10.5194/acp-23-4801-2023, 2023
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The future ozone evolution in SOCOLv4 simulations under SSP2-4.5 and SSP5-8.5 scenarios has been assessed for the period 2015–2099 and subperiods using the DLM approach. The SOCOLv4 projects a decline in tropospheric ozone in the 2030s in SSP2-4.5 and in the 2060s in SSP5-8.5. The stratospheric ozone increase is ~3 times higher in SSP5-8.5, confirming the important role of GHGs in ozone evolution. We also showed that tropospheric ozone strongly impacts the total column in the tropics.
Antonio G. Bruno, Jeremy J. Harrison, Martyn P. Chipperfield, David P. Moore, Richard J. Pope, Christopher Wilson, Emmanuel Mahieu, and Justus Notholt
Atmos. Chem. Phys., 23, 4849–4861, https://doi.org/10.5194/acp-23-4849-2023, https://doi.org/10.5194/acp-23-4849-2023, 2023
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A 3-D chemical transport model, TOMCAT; satellite data; and ground-based observations have been used to investigate hydrogen cyanide (HCN) variability. We found that the oxidation by O(1D) drives the HCN loss in the middle stratosphere and the currently JPL-recommended OH reaction rate overestimates HCN atmospheric loss. We also evaluated two different ocean uptake schemes. We found them to be unrealistic, and we need to scale these schemes to obtain good agreement with HCN observations.
Janusz Krzyścin
Atmos. Chem. Phys., 23, 3119–3132, https://doi.org/10.5194/acp-23-3119-2023, https://doi.org/10.5194/acp-23-3119-2023, 2023
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We propose indices to obtain the current stage of total column ozone (TCO3) recovery attributed to ozone-depleting substance (ODS) changes in the stratosphere. The indices are calculated using TCO3 values in key years of the ODS changes. The ozone recovery stage is derived for 16 sites in the NH mid-latitudes using results from ground and satellite measurements and reanalysis data. In Europe, there is a slow TCO3 recovery. A continuous TCO3 decline has been occurring in some sites since 1980.
Arseniy Karagodin-Doyennel, Eugene Rozanov, Timofei Sukhodolov, Tatiana Egorova, Jan Sedlacek, William Ball, and Thomas Peter
Atmos. Chem. Phys., 22, 15333–15350, https://doi.org/10.5194/acp-22-15333-2022, https://doi.org/10.5194/acp-22-15333-2022, 2022
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Applying the dynamic linear model, we confirm near-global ozone recovery (55°N–55°S) in the mesosphere, upper and middle stratosphere, and a steady increase in the troposphere. We also show that modern chemistry–climate models (CCMs) like SOCOLv4 may reproduce the observed trend distribution of lower stratospheric ozone, despite exhibiting a lower magnitude and statistical significance. The obtained ozone trend pattern in SOCOLv4 is generally consistent with observations and reanalysis datasets.
Ewa M. Bednarz, Ryan Hossaini, Martyn P. Chipperfield, N. Luke Abraham, and Peter Braesicke
Atmos. Chem. Phys., 22, 10657–10676, https://doi.org/10.5194/acp-22-10657-2022, https://doi.org/10.5194/acp-22-10657-2022, 2022
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Atmospheric impacts of chlorinated very short-lived substances (Cl-VSLS) over the first two decades of the 21st century are assessed using the UM-UKCA chemistry–climate model. Stratospheric input of Cl from Cl-VSLS is estimated at ~130 ppt in 2019. The use of model set-up with constrained meteorology significantly increases the abundance of Cl-VSLS in the lower stratosphere relative to the free-running set-up. The growth in Cl-VSLS emissions significantly impacted recent HCl and COCl2 trends.
Yajuan Li, Sandip S. Dhomse, Martyn P. Chipperfield, Wuhu Feng, Andreas Chrysanthou, Yuan Xia, and Dong Guo
Atmos. Chem. Phys., 22, 10635–10656, https://doi.org/10.5194/acp-22-10635-2022, https://doi.org/10.5194/acp-22-10635-2022, 2022
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Chemical transport models forced with (re)analysis meteorological fields are ideally suited for interpreting the influence of important physical processes on the ozone variability. We use TOMCAT forced by ECMWF ERA-Interim and ERA5 reanalysis data sets to investigate the effects of reanalysis forcing fields on ozone changes. Our results show that models forced by ERA5 reanalyses may not yet be capable of reproducing observed changes in stratospheric ozone, particularly in the lower stratosphere.
Ville Maliniemi, Pavle Arsenovic, Annika Seppälä, and Hilde Nesse Tyssøy
Atmos. Chem. Phys., 22, 8137–8149, https://doi.org/10.5194/acp-22-8137-2022, https://doi.org/10.5194/acp-22-8137-2022, 2022
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We simulate the effect of energetic particle precipitation (EPP) on Antarctic stratospheric ozone chemistry over the whole 20th century. We find a significant increase of reactive nitrogen due to EP, which can deplete ozone via a catalytic reaction. Furthermore, significant modulation of active chlorine is obtained related to EPP, which impacts ozone depletion by both active chlorine and EPP. Our results show that EPP has been a significant modulator of ozone chemistry during the CFC era.
Daniel J. Ruiz and Michael J. Prather
Atmos. Chem. Phys., 22, 2079–2093, https://doi.org/10.5194/acp-22-2079-2022, https://doi.org/10.5194/acp-22-2079-2022, 2022
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The stratosphere is an important source of tropospheric ozone, which affects climate, chemistry, and air quality, but is extremely difficult to quantify given the large production and loss terms in the troposphere. Here, we use other gases that are well observed and quantified as a reference to test our simulations of ozone transport in the atmosphere. This allows us to better constrain the stratospheric source of ozone and also offers guidance to improve future simulations of ozone transport.
Catherine Wilka, Susan Solomon, Doug Kinnison, and David Tarasick
Atmos. Chem. Phys., 21, 15771–15781, https://doi.org/10.5194/acp-21-15771-2021, https://doi.org/10.5194/acp-21-15771-2021, 2021
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We use satellite and balloon measurements to evaluate modeled ozone loss seen in the unusually cold Arctic of 2020 in the real world and compare it to simulations of a world avoided. We show that extensive denitrification in 2020 provides an important test case for stratospheric model process representations. If the Montreal Protocol had not banned ozone-depleting substances, an Arctic ozone hole would have emerged for the first time in spring 2020 that is comparable to those in the Antarctic.
Ville Maliniemi, Hilde Nesse Tyssøy, Christine Smith-Johnsen, Pavle Arsenovic, and Daniel R. Marsh
Atmos. Chem. Phys., 21, 11041–11052, https://doi.org/10.5194/acp-21-11041-2021, https://doi.org/10.5194/acp-21-11041-2021, 2021
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We simulate ozone variability over the 21st century with different greenhouse gas scenarios. Our results highlight a novel mechanism of additional reactive nitrogen species descending to the Antarctic stratosphere from the thermosphere/upper mesosphere due to the accelerated residual circulation under climate change. This excess descending NOx can potentially prevent a super recovery of ozone in the Antarctic upper stratosphere.
Nuria Pilar Plaza, Aurélien Podglajen, Cristina Peña-Ortiz, and Felix Ploeger
Atmos. Chem. Phys., 21, 9585–9607, https://doi.org/10.5194/acp-21-9585-2021, https://doi.org/10.5194/acp-21-9585-2021, 2021
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We study the role of different processes in setting the lower stratospheric water vapour. We find that mechanisms involving ice microphysics and small-scale mixing produce the strongest increase in water vapour, in particular over the Asian Monsoon. Small-scale mixing has a special relevance as it improves the agreement with observations at seasonal and intra-seasonal timescales, contrary to the North American Monsoon case, in which large-scale temperatures still dominate its variability.
James Keeble, Birgit Hassler, Antara Banerjee, Ramiro Checa-Garcia, Gabriel Chiodo, Sean Davis, Veronika Eyring, Paul T. Griffiths, Olaf Morgenstern, Peer Nowack, Guang Zeng, Jiankai Zhang, Greg Bodeker, Susannah Burrows, Philip Cameron-Smith, David Cugnet, Christopher Danek, Makoto Deushi, Larry W. Horowitz, Anne Kubin, Lijuan Li, Gerrit Lohmann, Martine Michou, Michael J. Mills, Pierre Nabat, Dirk Olivié, Sungsu Park, Øyvind Seland, Jens Stoll, Karl-Hermann Wieners, and Tongwen Wu
Atmos. Chem. Phys., 21, 5015–5061, https://doi.org/10.5194/acp-21-5015-2021, https://doi.org/10.5194/acp-21-5015-2021, 2021
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Stratospheric ozone and water vapour are key components of the Earth system; changes to both have important impacts on global and regional climate. We evaluate changes to these species from 1850 to 2100 in the new generation of CMIP6 models. There is good agreement between the multi-model mean and observations, although there is substantial variation between the individual models. The future evolution of both ozone and water vapour is strongly dependent on the assumed future emissions scenario.
Laura Stecher, Franziska Winterstein, Martin Dameris, Patrick Jöckel, Michael Ponater, and Markus Kunze
Atmos. Chem. Phys., 21, 731–754, https://doi.org/10.5194/acp-21-731-2021, https://doi.org/10.5194/acp-21-731-2021, 2021
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This study investigates the impact of strongly increased atmospheric methane mixing ratios on the Earth's climate. An interactive model system including atmospheric dynamics, chemistry, and a mixed-layer ocean model is used to analyse the effect of doubled and quintupled methane mixing ratios. We assess feedbacks on atmospheric chemistry and changes in the stratospheric circulation, focusing on the impact of tropospheric warming, and their relevance for the model's climate sensitivity.
Markus Kilian, Sabine Brinkop, and Patrick Jöckel
Atmos. Chem. Phys., 20, 11697–11715, https://doi.org/10.5194/acp-20-11697-2020, https://doi.org/10.5194/acp-20-11697-2020, 2020
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After the volcanic eruption of Mt Pinatubo in 1991, ozone decreased in the tropics and increased in the midlatitudes and polar regions for 1 year. The change in the ozone column is solely a result of the volcanic heating, followed by an ozone decrease in the higher latitudes. This is caused by the volcanic aerosol, which changes the heterogeneous chemistry and thus the catalytic ozone loss cycles. Vertical transport of water vapour is enhanced by volcanic heating and increases methane.
Matt Amos, Paul J. Young, J. Scott Hosking, Jean-François Lamarque, N. Luke Abraham, Hideharu Akiyoshi, Alexander T. Archibald, Slimane Bekki, Makoto Deushi, Patrick Jöckel, Douglas Kinnison, Ole Kirner, Markus Kunze, Marion Marchand, David A. Plummer, David Saint-Martin, Kengo Sudo, Simone Tilmes, and Yousuke Yamashita
Atmos. Chem. Phys., 20, 9961–9977, https://doi.org/10.5194/acp-20-9961-2020, https://doi.org/10.5194/acp-20-9961-2020, 2020
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We present an updated projection of Antarctic ozone hole recovery using an ensemble of chemistry–climate models. To do so, we employ a method, more advanced and skilful than the current multi-model mean standard, which is applicable to other ensemble analyses. It calculates the performance and similarity of the models, which we then use to weight the model. Calculating model similarity allows us to account for models which are constructed from similar components.
William T. Ball, Gabriel Chiodo, Marta Abalos, Justin Alsing, and Andrea Stenke
Atmos. Chem. Phys., 20, 9737–9752, https://doi.org/10.5194/acp-20-9737-2020, https://doi.org/10.5194/acp-20-9737-2020, 2020
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Recent lower stratospheric ozone decreases remain unexplained. We show that chemistry–climate models are not generally able to reproduce mid-latitude ozone and water vapour changes. Our analysis of observations provides evidence that climate change may be responsible for the ozone trends. While model projections suggest that extratropical ozone should recover by 2100, our study raises questions about their efficacy in simulating lower stratospheric changes in this region.
J. Eric Klobas, Debra K. Weisenstein, Ross J. Salawitch, and David M. Wilmouth
Atmos. Chem. Phys., 20, 9459–9471, https://doi.org/10.5194/acp-20-9459-2020, https://doi.org/10.5194/acp-20-9459-2020, 2020
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The rates of important ozone-destroying chemical reactions in the stratosphere are likely to change in the future. We employ a computer model to evaluate how the rates of ozone destruction by chlorine and bromine may evolve in four climate change scenarios with the introduction of the eta factor. We then show how these changing rates will impact the ozone-depleting power of the stratosphere with a new metric known as Equivalent Effective Stratospheric Benchmark-normalized Chlorine (EESBnC).
Yajuan Li, Martyn P. Chipperfield, Wuhu Feng, Sandip S. Dhomse, Richard J. Pope, Faquan Li, and Dong Guo
Atmos. Chem. Phys., 20, 8627–8639, https://doi.org/10.5194/acp-20-8627-2020, https://doi.org/10.5194/acp-20-8627-2020, 2020
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The Tibetan Plateau (TP) exerts important thermal and dynamical effects on atmospheric circulation, climate change as well as the ozone distribution. In this study, we use updated observations and model simulations to investigate the ozone trends and variations over the TP. Wintertime TP ozone variations are largely controlled by tropical to high-latitude transport processes, whereas summertime concentrations are a combined effect of photochemical decay and tropical processes.
Javier Alejandro Barrera, Rafael Pedro Fernandez, Fernando Iglesias-Suarez, Carlos Alberto Cuevas, Jean-Francois Lamarque, and Alfonso Saiz-Lopez
Atmos. Chem. Phys., 20, 8083–8102, https://doi.org/10.5194/acp-20-8083-2020, https://doi.org/10.5194/acp-20-8083-2020, 2020
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The inclusion of biogenic very short-lived bromocarbons (VSLBr) in the CAM-chem model improves the model–satellite agreement of the total ozone columns at mid-latitudes and drives a persistent hemispheric asymmetry in lowermost stratospheric ozone loss. The seasonal VSLBr impact on mid-latitude lowermost stratospheric ozone is influenced by the heterogeneous reactivation processes of inorganic chlorine on ice crystals, with a clear increase in ozone destruction during spring and winter.
James Keeble, N. Luke Abraham, Alexander T. Archibald, Martyn P. Chipperfield, Sandip Dhomse, Paul T. Griffiths, and John A. Pyle
Atmos. Chem. Phys., 20, 7153–7166, https://doi.org/10.5194/acp-20-7153-2020, https://doi.org/10.5194/acp-20-7153-2020, 2020
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The Montreal Protocol was agreed in 1987 to limit and then stop the production of man-made CFCs, which destroy stratospheric ozone. As a result, the atmospheric abundances of CFCs are now declining in the atmosphere. However, the atmospheric abundance of CFC-11 is not declining as expected under complete compliance with the Montreal Protocol. Using the UM-UKCA chemistry–climate model, we explore the impact of future unregulated production of CFC-11 on ozone recovery.
Hans Brenna, Steffen Kutterolf, Michael J. Mills, and Kirstin Krüger
Atmos. Chem. Phys., 20, 6521–6539, https://doi.org/10.5194/acp-20-6521-2020, https://doi.org/10.5194/acp-20-6521-2020, 2020
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The Los Chocoyos supereruption (84 000 years ago) in Guatemala was one of the largest volcanic events of the last 100 000 years. This eruption released enormous amounts of sulfur, which cooled the climate, as well as chlorine and bromine, which destroyed the ozone in the stratosphere. We have simulated this eruption by using an advanced chemistry–climate model. We found a collapse in the ozone layer lasting more than 10 years, increased surface–UV radiation, and a 30-year climate-cooling period.
Mikhail Sofiev, Rostislav Kouznetsov, Risto Hänninen, and Viktoria F. Sofieva
Atmos. Chem. Phys., 20, 1839–1847, https://doi.org/10.5194/acp-20-1839-2020, https://doi.org/10.5194/acp-20-1839-2020, 2020
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An episode of anomalously low ozone concentrations in the stratosphere over northern Europe occurred on 3–5 November 2018. The 30 % reduction of the ozone layer was predicted by the global chemistry-transport model of the Finnish Meteorological Institute driven by weather forecasts of ECMWF. The reduction was subsequently observed by ozone monitoring satellites. The episode was caused by a storm in the northern Atlantic, which uplifted air from the troposphere to stratosphere.
Martin Dameris, Patrick Jöckel, and Matthias Nützel
Atmos. Chem. Phys., 19, 13759–13771, https://doi.org/10.5194/acp-19-13759-2019, https://doi.org/10.5194/acp-19-13759-2019, 2019
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A chemistry–climate model (CCM) study is performed, investigating the consequences of a constant CFC-11 surface mixing ratio for stratospheric ozone in the future. The total column ozone is particularly affected in both polar regions in winter and spring. It turns out that the calculated ozone changes, especially in the upper stratosphere, are smaller than expected. In this attitudinal region the additional ozone depletion due to the catalysis by reactive chlorine is partly compensated for.
Quentin Errera, Simon Chabrillat, Yves Christophe, Jonas Debosscher, Daan Hubert, William Lahoz, Michelle L. Santee, Masato Shiotani, Sergey Skachko, Thomas von Clarmann, and Kaley Walker
Atmos. Chem. Phys., 19, 13647–13679, https://doi.org/10.5194/acp-19-13647-2019, https://doi.org/10.5194/acp-19-13647-2019, 2019
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BRAM2 is a 13-year reanalysis of the chemical composition from the upper troposphere to the lower mesosphere based on the assimilation of the Microwave Limb Sounder observations where eight species are assimilated: O3, H2O, N2O, HNO3, HCl, ClO, CH3Cl and CO. BRAM2 agrees generally well with independent observations in the middle stratosphere, the polar vortex and the upper troposphere–lower stratosphere but also shows several issues in the model and in the observations.
Ewa M. Bednarz, Amanda C. Maycock, Peter Braesicke, Paul J. Telford, N. Luke Abraham, and John A. Pyle
Atmos. Chem. Phys., 19, 9833–9846, https://doi.org/10.5194/acp-19-9833-2019, https://doi.org/10.5194/acp-19-9833-2019, 2019
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The atmospheric response to the amplitude of 11-year solar cycle in UM-UKCA is separated into the contributions from changes in direct radiative heating and photolysis rates, and the results compared with a control case with both effects included. We find that while the tropical responses are largely additive, this is not necessarily the case in the high latitudes. We suggest that solar-induced changes in ozone are important for modulating the SH dynamical response to the 11-year solar cycle.
Pavle Arsenovic, Alessandro Damiani, Eugene Rozanov, Bernd Funke, Andrea Stenke, and Thomas Peter
Atmos. Chem. Phys., 19, 9485–9494, https://doi.org/10.5194/acp-19-9485-2019, https://doi.org/10.5194/acp-19-9485-2019, 2019
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Low-energy electrons (LEE) are the dominant source of odd nitrogen, which destroys ozone, in the mesosphere and stratosphere in polar winter in the geomagnetically active periods. However, the observed stratospheric ozone anomalies can be reproduced only when accounting for both low- and middle-range energy electrons (MEE) in the chemistry-climate model. Ozone changes may induce further dynamical and thermal changes in the atmosphere. We recommend including both LEE and MEE in climate models.
Franziska Winterstein, Fabian Tanalski, Patrick Jöckel, Martin Dameris, and Michael Ponater
Atmos. Chem. Phys., 19, 7151–7163, https://doi.org/10.5194/acp-19-7151-2019, https://doi.org/10.5194/acp-19-7151-2019, 2019
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The atmospheric concentrations of the anthropogenic greenhouse gas methane are predicted to rise in the future. In this paper we investigate how very strong methane concentrations will impact the atmosphere. We analyse two experiments, one with doubled and one with quintupled methane concentrations and focus on the rapid atmospheric changes before the ocean adjusts to the induced
forcing. In particular these are changes in temperature, ozone, the hydroxyl radical and stratospheric water vapour.
Mengchu Tao, Paul Konopka, Felix Ploeger, Xiaolu Yan, Jonathon S. Wright, Mohamadou Diallo, Stephan Fueglistaler, and Martin Riese
Atmos. Chem. Phys., 19, 6509–6534, https://doi.org/10.5194/acp-19-6509-2019, https://doi.org/10.5194/acp-19-6509-2019, 2019
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This paper examines the annual and interannual variations as well as long-term trend of modeled stratospheric water vapor with a Lagrangian chemical transport model driven by ERA-I, MERRA-2 and JRA-55. We find reasonable consistency among the annual cycle, QBO and the variabilities induced by ENSO and volcanic aerosols. The main discrepancies are linked to the differences in reanalysis upwelling rates in the lower stratosphere. The trends are sensitive to the reanalyses that drives the model.
Felix Ploeger, Bernard Legras, Edward Charlesworth, Xiaolu Yan, Mohamadou Diallo, Paul Konopka, Thomas Birner, Mengchu Tao, Andreas Engel, and Martin Riese
Atmos. Chem. Phys., 19, 6085–6105, https://doi.org/10.5194/acp-19-6085-2019, https://doi.org/10.5194/acp-19-6085-2019, 2019
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We analyse the change in the circulation of the middle atmosphere based on current generation meteorological reanalysis data sets. We find that long-term changes from 1989 to 2015 are similar for the chosen reanalyses, mainly resembling the forced response in climate model simulations to climate change. For shorter periods circulation changes are less robust, and the representation of decadal variability appears to be a major uncertainty for modelling the circulation of the middle atmosphere.
Thomas von Clarmann and Sören Johansson
Atmos. Chem. Phys., 18, 15363–15386, https://doi.org/10.5194/acp-18-15363-2018, https://doi.org/10.5194/acp-18-15363-2018, 2018
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This review article compiles the characteristics of the gas chlorine nitrate and discusses its role in atmospheric chemistry. Chlorine nitrate is a reservoir of both stratospheric chlorine and nitrogen. Formation and sink processes are discussed, as well as spectral features and spectroscopic studies. Remote sensing, fluorescence, and mass spectroscopic measurement techniques are introduced, and global distributions and the annual cycle are discussed in the context of chlorine de-/activation.
Laura Thölix, Alexey Karpechko, Leif Backman, and Rigel Kivi
Atmos. Chem. Phys., 18, 15047–15067, https://doi.org/10.5194/acp-18-15047-2018, https://doi.org/10.5194/acp-18-15047-2018, 2018
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We analyse the impact of water vapour (WV) on Arctic ozone loss and find the strongest impact during intermediately cold stratospheric winters when chlorine activation increases with increasing PSCs and WV. In colder winters the impact is limited because chlorine activation becomes complete at relatively low WV values, so further addition of WV does not affect ozone loss. Our results imply that improved simulations of WV are needed for more reliable projections of ozone layer recovery.
Alina Fiehn, Birgit Quack, Irene Stemmler, Franziska Ziska, and Kirstin Krüger
Atmos. Chem. Phys., 18, 11973–11990, https://doi.org/10.5194/acp-18-11973-2018, https://doi.org/10.5194/acp-18-11973-2018, 2018
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Oceanic very short-lived substances, VSLS, contribute to stratospheric halogen loading and ozone depletion. We created bromoform emission inventories with monthly resolution for the tropical Indian Ocean and west Pacific and modeled the atmospheric transport of bromoform with the particle dispersion model FLEXPART/ERA-Interim. Results underline that the seasonal and regional stratospheric bromine entrainment critically depends on the seasonality and spatial distribution of the VSLS emissions.
Amanda C. Maycock, Katja Matthes, Susann Tegtmeier, Hauke Schmidt, Rémi Thiéblemont, Lon Hood, Hideharu Akiyoshi, Slimane Bekki, Makoto Deushi, Patrick Jöckel, Oliver Kirner, Markus Kunze, Marion Marchand, Daniel R. Marsh, Martine Michou, David Plummer, Laura E. Revell, Eugene Rozanov, Andrea Stenke, Yousuke Yamashita, and Kohei Yoshida
Atmos. Chem. Phys., 18, 11323–11343, https://doi.org/10.5194/acp-18-11323-2018, https://doi.org/10.5194/acp-18-11323-2018, 2018
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The 11-year solar cycle is an important driver of climate variability. Changes in incoming solar ultraviolet radiation affect atmospheric ozone, which in turn influences atmospheric temperatures. Constraining the impact of the solar cycle on ozone is therefore important for understanding climate variability. This study examines the representation of the solar influence on ozone in numerical models used to simulate past and future climate. We highlight important differences among model datasets.
Franziska Frank, Patrick Jöckel, Sergey Gromov, and Martin Dameris
Atmos. Chem. Phys., 18, 9955–9973, https://doi.org/10.5194/acp-18-9955-2018, https://doi.org/10.5194/acp-18-9955-2018, 2018
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It is frequently assumed that one methane molecule produces two water molecules. Applying various modeling concepts, we find that the yield of water from methane is vertically not constantly 2. In the upper stratosphere and lower mesosphere, transport of intermediate H2 molecules even led to a yield greater than 2. We conclude that for a realistic chemical source of stratospheric water vapor, one must also take other sources (H2), intermediates and the chemical removal of water into account.
Farahnaz Khosrawi, Oliver Kirner, Gabriele Stiller, Michael Höpfner, Michelle L. Santee, Sylvia Kellmann, and Peter Braesicke
Atmos. Chem. Phys., 18, 8873–8892, https://doi.org/10.5194/acp-18-8873-2018, https://doi.org/10.5194/acp-18-8873-2018, 2018
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An extensive assessment of the performance of the chemistry–climate model EMAC is given for Arctic winters 2009/2010 and 2010/2011. The EMAC simulations are compared to satellite observations. The comparisons between EMAC simulations and satellite observations show that model and measurements compare well for these two Arctic winters. However, differences between model and observations are found that need improvements in the model in the future.
Jens-Uwe Grooß, Rolf Müller, Reinhold Spang, Ines Tritscher, Tobias Wegner, Martyn P. Chipperfield, Wuhu Feng, Douglas E. Kinnison, and Sasha Madronich
Atmos. Chem. Phys., 18, 8647–8666, https://doi.org/10.5194/acp-18-8647-2018, https://doi.org/10.5194/acp-18-8647-2018, 2018
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We investigate a discrepancy between model simulations and observations of HCl in the dark polar stratosphere. In early winter, the less-well-studied period of the onset of chlorine activation, observations show a much faster depletion of HCl than simulations of three models. This points to some unknown process that is currently not represented in the models. Various hypotheses for potential causes are investigated that partly reduce the discrepancy. The impact on polar ozone depletion is low.
Sandip S. Dhomse, Douglas Kinnison, Martyn P. Chipperfield, Ross J. Salawitch, Irene Cionni, Michaela I. Hegglin, N. Luke Abraham, Hideharu Akiyoshi, Alex T. Archibald, Ewa M. Bednarz, Slimane Bekki, Peter Braesicke, Neal Butchart, Martin Dameris, Makoto Deushi, Stacey Frith, Steven C. Hardiman, Birgit Hassler, Larry W. Horowitz, Rong-Ming Hu, Patrick Jöckel, Beatrice Josse, Oliver Kirner, Stefanie Kremser, Ulrike Langematz, Jared Lewis, Marion Marchand, Meiyun Lin, Eva Mancini, Virginie Marécal, Martine Michou, Olaf Morgenstern, Fiona M. O'Connor, Luke Oman, Giovanni Pitari, David A. Plummer, John A. Pyle, Laura E. Revell, Eugene Rozanov, Robyn Schofield, Andrea Stenke, Kane Stone, Kengo Sudo, Simone Tilmes, Daniele Visioni, Yousuke Yamashita, and Guang Zeng
Atmos. Chem. Phys., 18, 8409–8438, https://doi.org/10.5194/acp-18-8409-2018, https://doi.org/10.5194/acp-18-8409-2018, 2018
Short summary
Short summary
We analyse simulations from the Chemistry-Climate Model Initiative (CCMI) to estimate the return dates of the stratospheric ozone layer from depletion by anthropogenic chlorine and bromine. The simulations from 20 models project that global column ozone will return to 1980 values in 2047 (uncertainty range 2042–2052). Return dates in other regions vary depending on factors related to climate change and importance of chlorine and bromine. Column ozone in the tropics may continue to decline.
Stefan Lossow, Dale F. Hurst, Karen H. Rosenlof, Gabriele P. Stiller, Thomas von Clarmann, Sabine Brinkop, Martin Dameris, Patrick Jöckel, Doug E. Kinnison, Johannes Plieninger, David A. Plummer, Felix Ploeger, William G. Read, Ellis E. Remsberg, James M. Russell, and Mengchu Tao
Atmos. Chem. Phys., 18, 8331–8351, https://doi.org/10.5194/acp-18-8331-2018, https://doi.org/10.5194/acp-18-8331-2018, 2018
Short summary
Short summary
Trend estimates of lower stratospheric H2O derived from the FPH observations at Boulder and a merged zonal mean satellite data set clearly differ for the time period from the late 1980s to 2010. We investigate if a sampling bias between Boulder and the zonal mean around the Boulder latitude can explain these trend discrepancies. Typically they are small and not sufficient to explain the trend discrepancies in the observational database.
James Keeble, Hannah Brown, N. Luke Abraham, Neil R. P. Harris, and John A. Pyle
Atmos. Chem. Phys., 18, 7625–7637, https://doi.org/10.5194/acp-18-7625-2018, https://doi.org/10.5194/acp-18-7625-2018, 2018
Short summary
Short summary
2017 marks the 30th anniversary of the Montreal Protocol, which was implemented to protect the stratospheric ozone layer from the harmful effects of synthetic ozone depleting substances. Since the late 1990s atmospheric concentrations of these species have begun to decline, and as a result ozone concentrations are expected to increase. In this study we use an ensemble of chemistry–climate simulations to investigate recent ozone trends and search for early signs of ozone recovery.
Stefanie Meul, Ulrike Langematz, Philipp Kröger, Sophie Oberländer-Hayn, and Patrick Jöckel
Atmos. Chem. Phys., 18, 7721–7738, https://doi.org/10.5194/acp-18-7721-2018, https://doi.org/10.5194/acp-18-7721-2018, 2018
Short summary
Short summary
Using a chemistry--climate model future changes in the stratosphere-to-troposphere ozone mass flux, their drivers, and the future distribution of stratospheric ozone in the troposphere are investigated. In an extreme greenhouse gas (GHG) scenario, the global influx of stratospheric ozone into the troposphere is projected to grow between 2000 and 2100 by 53%. The increase is due to the recovery of stratospheric ozone owing to declining halogens and GHG induced circulation and temperature changes.
Cited articles
Anderson, J., Froidevaux, L., Fuller, R. A., Bernath, P. F., Livesey, N. J.,
Pumphrey, H. C., Read, W. G., Russell III, J. M., and Walker, K. A.: GOZCARDS Merged Water
Vapor 1 month L3 10 degree Zonal Means on a Vertical Pressure Grid V1.01,
Greenbelt, MD, USA, Goddard Earth Sciences Data and Information Services Center
(GES DISC), https://doi.org/10.5067/MEASURES/GOZCARDS/DATA3004, 2013.
Andersson, M. E., Verronen, P. T., Marsh, D. R., Pälvärinta, S.-M.,
and Plane, J. M. C.: WACCM-D-Improved modeling of nitric acid and active
chlorine during energetic particle precipitation, J. Geophys. Res.-Atmos.,
121, 10328–10341, https://doi.org/10.1002/2015JD024173, 2016.
Ball, W. T., Alsing, J., Mortlock, D. J., Rozanov, E. V., Tummon, F., and
Haigh, J. D.: Reconciling differences in stratospheric ozone composites,
Atmos. Chem. Phys., 17, 12269–12302,
https://doi.org/10.5194/acp-17-12269-2017, 2017.
Ball, W. T., Alsing, J., Mortlock, D. J., Staehelin, J., Haigh, J. D., Peter,
T., Tummon, F., Stübi, R., Stenke, A., Anderson, J., Bourassa, A., Davis,
S. M., Degenstein, D., Frith, S., Froidevaux, L., Roth, C., Sofieva, V.,
Wang, R., Wild, J., Yu, P., Ziemke, J. R., and Rozanov, E. V.: Evidence for a
continuous decline in lower stratospheric ozone offsetting ozone layer
recovery, Atmos. Chem. Phys., 18, 1379–1394,
https://doi.org/10.5194/acp-18-1379-2018, 2018.
Bandoro, J., Solomon, S., Santer, B. D., Kinnison, D. E., and Mills, M. J.:
Detectability of the impacts of ozone-depleting substances and greenhouse
gases upon stratospheric ozone accounting for nonlinearities in historical
forcings, Atmos. Chem. Phys., 18, 143–166,
https://doi.org/10.5194/acp-18-143-2018, 2018.
Böhringer, H., Fahey, D. W., Fehsenfeld, F. C., and Ferguson, E. E.: The
role of ion–molecule reactions in the conversion of N2O5 to
HNO3 in the stratosphere, Planet. Space. Sci., 31, 185–191, 1983.
Bönisch, H., Engel, A., Birner, Th., Hoor, P., Tarasick, D. W., and Ray,
E. A.: On the structural changes in the Brewer-Dobson circulation after 2000,
Atmos. Chem. Phys., 11, 3937–3948, https://doi.org/10.5194/acp-11-3937-2011,
2011.
Bourassa, A. E., Degenstein, D. A., Randel, W. J., Zawodny, J. M.,
Kyrölä, E., McLinden, C. A., Sioris, C. E., and Roth, C. Z.: Trends
in stratospheric ozone derived from merged SAGE II and Odin-OSIRIS satellite
observations, Atmos. Chem. Phys., 14, 6983–6994,
https://doi.org/10.5194/acp-14-6983-2014, 2014.
Brinkop, S., Dameris, M., Jöckel, P., Garny, H., Lossow, S., and Stiller,
G.: The millennium water vapour drop in chemistry–climate model simulations,
Atmos. Chem. Phys., 16, 8125–8140, https://doi.org/10.5194/acp-16-8125-2016,
2016.
Calvo, N., Garcia, R. R., and Kinnison, D. E.: Revisiting Southern Hemisphere
polar stratospheric temperature trends in WACCM: The role of dynamical
forcing, Geophys. Res. Lett., 44, 3402–3410, https://doi.org/10.1002/2017GL072792, 2017.
Carpenter, L. J., Reimann, S., Burkholder, J. B., Clerbaux, C., Hall, B. D.,
Hossaini, R., Laube, J. C., and Yvon-Lewis, S. A.: Ozone-depleting substances
(ODSs) and other gases of interest to the Montreal Protocol, chap. 1, in:
Scientific Assessment of Ozone Depletion: 2014, Global Ozone Research and
Monitoring Project – Report No. 55, World Meteorological Organization,
Geneva, Switzerland, 2014.
Chipperfield, M. P., Dhomse, S., Hossaini, R., Feng, W., Santee, M. L.,
Weber, M., Burrows, J. P., Wild, J. D., Loyola, D., and Coldewey-Egbers, M.:
On the cause of recent variations in lower stratospheric ozone, Geophys. Res.
Lett., 45, 5718–5726, https://doi.org/10.1029/2018GL078071, 2018.
Damadeo, R. P., Zawodny, J. M., Thomason, L. W., and Iyer, N.: SAGE version
7.0 algorithm: application to SAGE II, Atmos. Meas. Tech., 6, 3539–3561,
https://doi.org/10.5194/amt-6-3539-2013, 2013.
Davis, S. M., Rosenlof, K. H., Hassler, B., Hurst, D. F., Read, W. G.,
Vömel, H., Selkirk, H., Fujiwara, M., and Damadeo, R.: The Stratospheric
Water and Ozone Satellite Homogenized (SWOOSH) database: a long-term database
for climate studies, Earth Syst. Sci. Data, 8, 461–490,
https://doi.org/10.5194/essd-8-461-2016, 2016.
Dessler, A. E., Schoeberl, M. R., Wang, T., Davis, S. M., Rosenlof, K. H.,
and Vernier, J.-P.: Variations of stratospheric water vapor over the past
three decades, J. Geophys. Res.-Atmos., 119, 12588–12598,
https://doi.org/10.1002/2014JD021712, 2014.
Dhomse, S. S., Kinnison, D., Chipperfield, M. P., Salawitch, R. J., Cionni,
I., Hegglin, M. I., Abraham, N. L., Akiyoshi, H., Archibald, A. T., Bednarz,
E. M., Bekki, S., Braesicke, P., Butchart, N., Dameris, M., Deushi, M.,
Frith, S., Hardiman, S. C., Hassler, B., Horowitz, L. W., Hu, R.-M.,
Jöckel, P., Josse, B., Kirner, O., Kremser, S., Langematz, U., Lewis, J.,
Marchand, M., Lin, M., Mancini, E., Marécal, V., Michou, M., Morgenstern,
O., O'Connor, F. M., Oman, L., Pitari, G., Plummer, D. A., Pyle, J. A.,
Revell, L. E., Rozanov, E., Schofield, R., Stenke, A., Stone, K., Sudo, K.,
Tilmes, S., Visioni, D., Yamashita, Y., and Zeng, G.: Estimates of ozone
return dates from Chemistry-Climate Model Initiative simulations, Atmos.
Chem. Phys., 18, 8409–8438, https://doi.org/10.5194/acp-18-8409-2018, 2018.
Douglass, A. R., Prather, M. J., Hall, T. M., Strahan, S. E., Rasch, P. J.,
Sparling, L. C., Coy, L., and Rodriguez, J. M.: Choosing meteorological input
for the global modeling initiative assessment of high-speed aircraft, J.
Geophys. Res., 104, 27545–27564, 1999.
Douglass, A. R., Strahan, S. E., Oman, L. D., and Stolarski, R. S.:
Multi-decadal records of stratospheric composition and their relationship to
stratospheric circulation change, Atmos. Chem. Phys., 17, 12081–12096,
https://doi.org/10.5194/acp-17-12081-2017, 2017.
Ern, M., Preusse, P., and Riese, M.: Driving of the SAO by gravity waves as
observed from satellite, Ann. Geophys., 33, 483–504,
https://doi.org/10.5194/angeo-33-483-2015, 2015.
Eyring, V., Lamarque, J.-F., Hess, P., Arfeuille, F., Bowman, K.,
Chipperfield, M. P., Duncan, B., Fiore, A., Gettelman, A., Giorgetta, M. A.,
Granier, C., Hegglin, M., Kinnison, D., Kunze, M., Langematz, U., Luo, B.,
Martin, R., Matthes, K., Newman, P. A., Peter, T., Robock, A., Ryerson, T.,
Saiz-Lopez, A., Salawitch, R., Schultz, M., Shepherd, T. G., Shindell, D.,
Stähelin, J., Tegtmeier, S., Thomason, L., Tilmes, S., Vernier, J.-P.,
Waugh, D. W., and Young, P.: Overview of IGAC/SPARC Chemistry-Climate Model
Initiative (CCMI) Community Simulations in Support of Upcoming Ozone and
Climate Assessments, SPARC Newsletter, 40, 48–66, 2013.
Feldman, D. R., Collins, W. D., Biraud, S. C., Risser, M. D., Turner, D. D.,
Gero, P. J., Tadic, J., Helmig, D., Xie, S., Mlawer, E. J., Shippert, T. R.,
and Torn, M. S.: Observationally derived rise in methane surface forcing
mediated by water vapour trends, Nat. Geosci., 11, 238–246,
https://doi.org/10.1038/s41561-018-0085-9, 2018.
Frith, S. M., Stolarski, R. S., Kramarova, N. A., and McPeters, R. D.:
Estimating uncertainties in the SBUV Version 8.6 merged profile ozone data
set, Atmos. Chem. Phys., 17, 14695–14707,
https://doi.org/10.5194/acp-17-14695-2017, 2017.
Froidevaux, L., Livesey, N. J., Read, W. G., Salawitch, R. J., Waters, J. W.,
Drouin, B., MacKenzie, I. A., Pumphrey, H. C., Bernath, P., Boone, C.,
Nassar, R., Montzka, S., Elkins, J., Cunnold, D., and Waugh, D.: Temporal
decrease in upper atmospheric chlorine, Geophys. Res. Lett., 33, L23813,
https://doi.org/10.1029/2006GL027600, 2006.
Froidevaux, L., Jiang, Y. B., Lambert, A., Livesey, N. J., Read, W. G.,
Waters, J. W., Fuller, R. A., Marcy, T. P., Popp, P. J., Gao, R. S., Fahey,
D. W., Jucks, K. W., Stachnik, R. A., Toon, G. C., Christensen, L. E.,
Webster, C. R., Bernath, P. F., Boone, C. D., Walker, K. A., Pumphrey, H. C.,
Harwood, R. S., Manney, G. L., Schwartz, M. J., Daffer,W.H., Drouin, B. J.,
Cofield, R. E., Cuddy, D. T., Jarnot, R. F., Knosp, B. W., Perun, V. S.,
Snyder, W. V., Stek, P. C., Thurstans, R. P., and Wagner, P. A.: Validation
of Aura Microwave Limb Sounder HCl measurements, J. Geophys. Res., 113,
D15S25, https://doi.org/10.1029/2007JD009025, 2008a.
Froidevaux, L., Jiang, Y. B., Lambert, A., Livesey, N. J., Read, W. G.,
Waters, J. W., Browell, E. V., Hair, J. W., Avery, M. A., McGee, T. J.,
Twigg, L. W., Sumnicht, G. K., Jucks, K. W., Margitan, J. J., Sen, B.,
Stachnik, R. A., Toon, G. C., Bernath, P. F., Boone, C. D., Walker, K. A.,
Filipiak, M. J., Harwood, R. S., Fuller, R. A., Manney, G. L., Schwartz, M.
J., Daffer,W.H., Drouin, B. J., Cofield, R. E., Cuddy, D. T., Jarnot, R. F.,
Knosp, B. W., Perun, V. S., Snyder, W. V., Stek, P. C., Thurstans, R. P., and
Wagner, P. A.: Validation of Aura Microwave Limb Sounder stratospheric and
mesospheric ozone measurements, J. Geophys. Res., 113, D15S20,
https://doi.org/10.1029/2007JD008771, 2008b.
Froidevaux, L., Anderson, J., Fuller, R. A., Bernath, P. F., Livesey, N. J., Russell III,
J. M., and Walker, K. A.: GOZCARDS Merged Hydrogen Chloride 1 month L3 10 degree
Zonal Means on a Vertical Pressure Grid V1.01, Greenbelt, MD, USA, Goddard Earth Sciences
Data and Information Services Center (GES DISC), https://doi.org/10.5067/MEASURES/GOZCARDS/DATA300, 2013.
Froidevaux, L., Anderson, J., Wang, H.-J., Fuller, R. A., Schwartz, M. J.,
Santee, M. L., Livesey, N. J., Pumphrey, H. C., Bernath, P. F., Russell III,
J. M., and McCormick, M. P.: Global OZone Chemistry And Related trace gas
Data records for the Stratosphere (GOZCARDS): methodology and sample results
with a focus on HCl, H2O, and O3, Atmos. Chem. Phys., 15,
10471–10507, https://doi.org/10.5194/acp-15-10471-2015, 2015.
Fueglistaler, S.: Step-wise changes in stratospheric water vapor?, J.
Geophys. Res., 117, D13302, https://doi.org/10.1029/2012JD017582, 2012.
Fueglistaler, S. and Haynes, P. H.: Control of interannual and longer-term
variability of stratospheric water vapor, J. Geophys. Res., 110, D24108,
https://doi.org/10.1029/2005JD006019, 2005.
Funke, B., Baumgaertner, A., Calisto, M., Egorova, T., Jackman, C. H.,
Kieser, J., Krivolutsky, A., López-Puertas, M., Marsh, D. R., Reddmann,
T., Rozanov, E., Salmi, S.-M., Sinnhuber, M., Stiller, G. P., Verronen, P.
T., Versick, S., von Clarmann, T., Vyushkova, T. Y., Wieters, N., and
Wissing, J. M.: Composition changes after the “Halloween” solar proton
event: the High Energy Particle Precipitation in the Atmosphere (HEPPA) model
versus MIPAS data intercomparison study, Atmos. Chem. Phys., 11, 9089–9139,
https://doi.org/10.5194/acp-11-9089-2011, 2011.
Garcia, R. R., Marsh, D., Kinnison, D. E., Boville, B., and Sassi, F.:
Simulations of secular trends in the middle atmosphere, 1950–2003, J.
Geophys. Res., 112, D09301, https://doi.org/10.1029/2006JD007485, 2007.
Garcia, R. R., Smith, A. K., Kinnison, D. E., de la Camara, A., and Murphy,
D.: Modification of the gravity wave parameterization in the Whole Atmosphere
Community Climate Model: Motivation and results, J. Atmos. Sci., 74,
275–291, https://doi.org/10.1175/JAS-D-16-0104.1, 2017.
Gebhardt, C., Rozanov, A., Hommel, R., Weber, M., Bovensmann, H., Burrows, J.
P., Degenstein, D., Froidevaux, L., and Thompson, A. M.: Stratospheric ozone
trends and variability as seen by SCIAMACHY from 2002 to 2012, Atmos. Chem.
Phys., 14, 831–846, https://doi.org/10.5194/acp-14-831-2014, 2014.
Gille, J., Karol, S., Kinnison, D., Lamarque, J.-F., and Yudin, V.: The role
of mid-latitude mixing barriers in creating the annual variation of total
ozone in high northern latitudes, J. Geophys. Res., 119, 9578–9595,
https://doi.org/10.1002/2013JD0214162014, 2014.
Grooß, J.-U., Müller, R., Spang, R., Tritscher, I., Wegner, T.,
Chipperfield, M. P., Feng, W., Kinnison, D. E., and Madronich, S.: On the
discrepancy of HCl processing in the core of the wintertime polar vortices,
Atmos. Chem. Phys., 18, 8647–8666, https://doi.org/10.5194/acp-18-8647-2018,
2018.
Haenel, F. J., Stiller, G. P., von Clarmann, T., Funke, B., Eckert, E.,
Glatthor, N., Grabowski, U., Kellmann, S., Kiefer, M., Linden, A., and
Reddmann, T.: Reassessment of MIPAS age of air trends and variability, Atmos.
Chem. Phys., 15, 13161–13176, https://doi.org/10.5194/acp-15-13161-2015,
2015.
Harris, N. R. P., Hassler, B., Tummon, F., Bodeker, G. E., Hubert, D.,
Petropavlovskikh, I., Steinbrecht, W., Anderson, J., Bhartia, P. K., Boone,
C. D., Bourassa, A., Davis, S. M., Degenstein, D., Delcloo, A., Frith, S. M.,
Froidevaux, L., Godin-Beekmann, S., Jones, N., Kurylo, M. J., Kyrölä,
E., Laine, M., Leblanc, S. T., Lambert, J.-C., Liley, B., Mahieu, E.,
Maycock, A., de Mazière, M., Parrish, A., Querel, R., Rosenlof, K. H.,
Roth, C., Sioris, C., Staehelin, J., Stolarski, R. S., Stübi, R.,
Tamminen, J., Vigouroux, C., Walker, K. A., Wang, H. J., Wild, J., and
Zawodny, J. M.: Past changes in the vertical distribution of ozone – Part 3:
Analysis and interpretation of trends, Atmos. Chem. Phys., 15, 9965-9982,
https://doi.org/10.5194/acp-15-9965-2015, 2015.
Hegglin, M. I., Tegtmeier, S., Anderson, J., Froidevaux, L., Fuller, R.,
Funke, B., Jones, A., Lingenfelser, G., Lumpe, J., Pendlebury, D., Remsberg,
E., Rozanov, A., Toohey, M., Urban, J., von Clarmann, T., Walker, K. A.,
Wang, R., and Weigel, K.: SPARC Data Initiative: Comparison of water vapor
climatologies from international satellite limb sounders, J. Geophys.
Res.-Atmos., 118, 11824–11846, https://doi.org/10.1002/jgrd.50752, 2013.
Hegglin, M. I., Plummer, D. A., Shepherd, T. G., Scinocca, J. F., Anderson,
J., Froidevaux, L., Funke, B., Hurst, D. and Rozanov, A., Urban, J., von
Clarmann, T., Walker, K. A., Wang, H. J., Tegtmeier, S., and Weigel, K.:
Vertical structure of stratospheric water vapour trends derived from merged
satellite data, Nat. Geosci., 7, 768–776, https://doi.org/10.1038/ngeo2236,
2014.
Holton, J. R. and Gettelman, A.:Horizontal transport and the dehydration of
the stratosphere, Geophys. Res. Lett., 28, 2799–2802, 2001.
Hossaini, R., Atlas, E., Dhomse, S. S., Chipperfield, M. P., Bernath, P. F.,
Fernando, A. M., Mühle, J., Leeson, A. A., Montzka, S. A., Feng, W.,
Harrison, J., Krummel, P., Vollmer, M. K., Reimann, S., O'Doherty, S., Young,
D., Maione, M., Arduini, J., and Lunder, C. R. : Recent trends in
stratospheric chlorine from very short-lived substances, J. Geophys.
Res.-Atmos., 124, 2318–2335, https://doi.org/10.1029/2018JD029400, 2019.
Hubert, D., Lambert, J.-C., Verhoelst, T., Granville, J., Keppens, A., Baray,
J.-L., Bourassa, A. E., Cortesi, U., Degenstein, D. A., Froidevaux, L.,
Godin-Beekmann, S., Hoppel, K. W., Johnson, B. J., Kyrölä, E.,
Leblanc, T., Lichtenberg, G., Marchand, M., McElroy, C. T., Murtagh, D.,
Nakane, H., Portafaix, T., Querel, R., Russell III, J. M., Salvador, J.,
Smit, H. G. J., Stebel, K., Steinbrecht, W., Strawbridge, K. B., Stübi,
R., Swart, D. P. J., Taha, G., Tarasick, D. W., Thompson, A. M., Urban, J.,
van Gijsel, J. A. E., Van Malderen, R., von der Gathen, P., Walker, K. A.,
Wolfram, E., and Zawodny, J. M.: Ground-based assessment of the bias and
long-term stability of 14 limb and occultation ozone profile data records,
Atmos. Meas. Tech., 9, 2497–2534, https://doi.org/10.5194/amt-9-2497-2016,
2016.
Hurst, D. F., Oltmans, S. J., Vomel, H., Rosenlof, K. H., Davis, S. M., Ray,
E. A., Hall, E. G., and Jordan, A.: Stratospheric water vapor trends over
Boulder, Colorado: Analysis of the 30 year Boulder record, J. Geophys. Res.,
116, D02306, https://doi.org/10.1029/2010JD015065, 2011.
Hurst, D. F., Read, W. G., Vömel, H., Selkirk, H. B., Rosenlof, K. H.,
Davis, S. M., Hall, E. G., Jordan, A. F., and Oltmans, S. J.: Recent
divergences in stratospheric water vapor measurements by frost point
hygrometers and the Aura Microwave Limb Sounder, Atmos. Meas. Tech., 9,
4447–4457, https://doi.org/10.5194/amt-9-4447-2016, 2016.
Imai, K., Manago, N., Mitsuda, C., Naito, Y., Nishimoto, E., Sakazaki, T.,
Fujiwara, M., Froidevaux, L., von Clarmann, T., Stiller, G. P., Murtagh, D.
P., Rong, P.-P., Mlynczak, M. G., Walker, K. A., Kinnison, D. E., Akiyoshi,
H., Nakamura, T., Miyasaka, T., Nishibori, T., Mizobuchi, S., Kikuchi, K.-I.,
Ozeki, H., Takahashi, C., Hayashi, H., Sano, T., Suzuki, M., Takayanagi, M.,
and Shiotani, M.: Validation of ozone data from the Superconducting
Submillimeter-Wave Limb-Emission Sounder (SMILES), J. Geophys. Res.-Atmos.,
118, 5750–5769, https://doi.org/10.1002/jgrd.50434, 2013.
Jackman, C. H., Marsh, D. R., Kinnison, D. E., Mertens, C. J., and Fleming,
E. L.: Atmospheric changes caused by galactic cosmic rays over the period
1960–2010, Atmos. Chem. Phys., 16, 5853–5866,
https://doi.org/10.5194/acp-16-5853-2016, 2016.
Jensen, E. and Pfister, L.: Transport and freeze-drying in the tropical
tropopause layer, J. Geophys. Res.-Atmos., 109, D02207,
https://doi.org/10.1029/2003JD004022, 2004.
Jiang, Y. B., Froidevaux, L., Lambert, A., Livesey, N. J., Read, W. G.,
Waters, J. W., Bojkov, B., Leblanc, T., McDermid, I. S., Godin-Beekmann, S.,
Filipiak, M. J., Harwood, R. S., Fuller, R. A., Daffer, W. H., Drouin, B. J.,
Cofield, R. E., Cuddy, D. T., Jarnot, R. F., Knosp, B. W., Perun, V. S.,
Schwartz, M. J., Snyder, W. V., Stek, P. C., Thurstans, R. P., Wagner, P. A.,
Allaart, M., Andersen, S. B., Bodeker, G., Calpini, B., Claude, H., Coetzee,
G., Davies, J., De Backer, H., Dier, H., Fujiwara, M., Johnson, B., Kelder,
H., Leme, N. P., Koenig-Langlo, G., Kyro, E., Laneve, G., Fook, L. S.,
Merrill, J., Morris, G., Newchurch, M., Oltmans, S., Parrondo, M. C., Posny,
F., Schmidlin, F., Skrivankova, P., Stubi, R., Tarasick, D., Thompson, A.,
Thouret, V., Viatte, P., Vömel, H., von Der Gathen, P., Yela, M., and
Zablocki, G.: Validation of the Aura Microwave Limb Sounder Ozone by
Ozonesonde and Lidar Measurements, J. Geophys. Res., 112, D24S34,
https://doi.org/10.1029/2007JD008776, 2007.
Khosrawi, F., Müller, R., Urban, J., Proffitt, M. H., Stiller, G.,
Kiefer, M., Lossow, S., Kinnison, D., Olschewski, F., Riese, M., and Murtagh,
D.: Assessment of the interannual variability and influence of the QBO and
upwelling on tracer–tracer distributions of N2O and O3 in
the tropical lower stratosphere, Atmos. Chem. Phys., 13, 3619–3641,
https://doi.org/10.5194/acp-13-3619-2013, 2013.
Kinnison, D. E., Brasseur, G. P., Walters, S., Garcia, R. R., Sassi, F.,
Boville, B. A., Marsh, D., Harvey, L., Randall, C., Randel, W., Lamarque,
J.-F., Emmons, L. K., Hess, P., Orlando, J., Tyndall, J., and Pan, L.:
Sensitivity of chemical tracers to meteorological parameters in the MOZART-3
chemical transport model, J. Geophys. Res., 112, D20302,
https://doi.org/10.1029/2006JD007879, 2007.
Kunz, A., Pan, L., Konopka, P., Kinnison, D., and Tilmes, S.: Chemical and
dynamical discontinuity at the extratropoical tropopause based on START08 and
WACCM analysis, J. Geophys. Res., 116, D24302, https://doi.org/10.1029/2011JD016686,
2011.
Kuttippurath, J., Bodeker, G. E., Roscoe, H. K., and Nair, P. J.: A
cautionary note on the use of EESC-based regression analysis for ozone trend
studies, Geophys. Res. Lett., 42, 162–168, https://doi.org/10.1002/2014GL062142, 2015.
Kvissel, O.-K., Orsolini, Y. J., Stordal, F., Isaksen, I. S. A., and Santee,
M. L.: Formation of stratospheric nitric acid by a hydrated ion cluster
reaction: Implications for the effect of energetic particle precipitation on
the middle atmosphere, J. Geophys. Res., 117, D16301,
https://doi.org/10.1029/2011JD017257, 2012.
Lamarque, J.-F., Emmons, L. K., Hess, P. G., Kinnison, D. E., Tilmes, S.,
Vitt, F., Heald, C. L., Holland, E. A., Lauritzen, P. H., Neu, J., Orlando,
J. J., Rasch, P. J., and Tyndall, G. K.: CAM-chem: description and evaluation
of interactive atmospheric chemistry in the Community Earth System Model,
Geosci. Model Dev., 5, 369–411, https://doi.org/10.5194/gmd-5-369-2012,
2012.
Lambert, A., Read, W. G., Livesey, N. J., Santee, M. L., Manney, G. L.,
Froidevaux, L., Wu, D. L., Schwartz, M. J., Pumphrey, H. C., Jimenez, C.,
Nedoluha, G. E., Cofield, R. E., Cuddy, D. T., Daffer, W. H., Drouin, B. J.,
Fuller, R. A., Jarnot, R. F., Knosp, B. W., Pickett, H. M., Perun, V. S.,
Snyder, W. V., Stek, P. C., Thurstans, R. P., Wagner, P. A., Waters, J. W.,
Jucks, K. W., Toon, G. C., Stachnik, R. A., Bernath, P. F., Boone, C. D.,
Walker, K. A., Urban, J., Murtagh, D., Elkins, J. W., and Atlas, E.:
Validation of the Aura Microwave Limb Sounder stratospheric water vapour and
nitrous oxide measurements, J. Geophys. Res., 112, D24S36,
https://doi.org/10.1029/2007JD008724, 2007.
Lin, S.-J.: A “vertically-Lagrangian” finite-volume dynamical core for
global atmospheric models, Mon. Weather Rev., 132, 2293–2307, 2004.
Livesey, N. J., Filipiak, M. J., Froidevaux, L., Read, W. G., Lambert, A.,
Santee, M. L., Jiang, J. H., Waters, J. W., Cofield,R. E., Cuddy, D. T.,
Daffer, W. H., Drouin, B. J., Fuller, R. A., Jarnot, R. F., Jiang, Y. B.,
Knosp, B. W., Li, Q. B., Perun, V. S., Schwartz, M. J., Snyder,W. V., Stek,
P. C., Thurstans, R. P.,Wagner, P. A., Pumphrey, H. C., Avery, M., Browell,
E. V., Cammas, J.-P., Christensen, L. E., Edwards, D. P., Emmons, L. K., Gao,
R.-S., Jost, H.-J., Loewenstein, M., Lopez, J. D., Nedelec, P., Osterman, G.
B., Sachse, G. W., and Webster, C. R.: Validation of Aura Microwave Limb
Sounder O3 and CO observations in the upper troposphere and lower
stratosphere, J. Geophys. Res., 113, D15S02, https://doi.org/10.1029/2007JD008805, 2008.
Livesey, N. J., Read, W. G., Froidevaux, L., Lambert, A., Manney, G. L.,
Pumphrey, H. C., Santee, M. L., Schwartz, M. J., Wang, S., Cofield, R. E.,
Cuddy, D. T., Fuller, R. A., Jarnot, R. F., Jiang, J. H., Knosp, B. W., Stek,
P. C., Wagner, P. A., and Wu, D. L.: EOS MLS Version 4.2x Level 2 data
quality and description document, Tech. rep., Jet Propulsion Laboratory
D-33509 Rev. D, available at: http://mls.jpl.nasa.gov/ (last access: 4
April 2019), 2018.
Lopez-Puertas, M., Funke, B., Gil-Lopez, S., von Clarmann, T., Stiller, G.
P., Höpfner, M., Kellmann, S., Mengistu Tsidu, G., Fischer, H., and
Jackman, C. H.: HNO3, N2O5 and ClONO2 Enhancements
after the October–November 2003 Solar Proton Events, J. Geophys. Res., 110,
A09S44, https://doi.org/10.1029/2005JA011051, 2005.
Lossow, S., Khosrawi, F., Nedoluha, G. E., Azam, F., Bramstedt, K., Burrows,
John. P., Dinelli, B. M., Eriksson, P., Espy, P. J., García-Comas, M.,
Gille, J. C., Kiefer, M., Noël, S., Raspollini, P., Read, W. G.,
Rosenlof, K. H., Rozanov, A., Sioris, C. E., Stiller, G. P., Walker, K. A.,
and Weigel, K.: The SPARC water vapour assessment II: comparison of annual,
semi-annual and quasi-biennial variations in stratospheric and lower
mesospheric water vapour observed from satellites, Atmos. Meas. Tech., 10,
1111–1137, https://doi.org/10.5194/amt-10-1111-2017, 2017a.
Lossow, S., Garny, H., and Jöckel, P.: An “island” in the stratosphere
– on the enhanced annual variation of water vapour in the middle and upper
stratosphere in the southern tropics and subtropics, Atmos. Chem. Phys., 17,
11521–11539, https://doi.org/10.5194/acp-17-11521-2017, 2017b.
Mahieu, E., Chipperfield, M. P., Notholt, J., Reddmann, T., Anderson, J.,
Bernath, P. F., Blumenstock, T., Coffey, M. T., Dhomse, S. S., Feng, W.,
Franco, B., Froidevaux, L., Griffith, D. W. T., Hannigan, J. W., Hase, F.,
Hossaini, R., Jones, N. B., Morino, I., Murata, I., Nakajima, H., Palm, M.,
Paton-Walsh, C., Russell III, J. M., Schneider, M., Servais, C., Smale, D.,
and Walker, K. A.: Recent Northern Hemisphere stratospheric HCl increase due
to atmospheric circulation changes, Nature, 515, 104–107,
https://doi.org/10.1038/nature13857, 2014.
Marsh, D. R., Mills, M. J., Kinnison, D. E., Lamarque, J.-F., Calvo, N., and
Polvani, L. M.: Climate change from 1850 to 2005 simulated in CESM1 (WACCM),
J. Climate, 26, 7372–7391, https://doi.org/10.1175/JCLI-D-12-00558.1, 2013.
Matthes, K., Marsh, D. R., Garcia, R. R., Kinnison, D. E., Sassi, F., and
Walters, S.: Role of the QBO in modulating the influence of the 11-year solar
cycle on the atmosphere using constant forcings, J. Geophys. Res., 115,
D18110, https://doi.org/10.1029/2009JD013020, 2010.
Millán, L. F., Livesey, N. J., Santee, M. L., Neu, J. L., Manney, G. L.,
and Fuller, R. A.: Case studies of the impact of orbital sampling on
stratospheric trend detection and derivation of tropical vertical velocities:
solar occultation vs. limb emission sounding, Atmos. Chem. Phys., 16,
11521–11534, https://doi.org/10.5194/acp-16-11521-2016, 2016.
Morgenstern, O., Hegglin, M. I., Rozanov, E., O'Connor, F. M., Abraham, N.
L., Akiyoshi, H., Archibald, A. T., Bekki, S., Butchart, N., Chipperfield, M.
P., Deushi, M., Dhomse, S. S., Garcia, R. R., Hardiman, S. C., Horowitz, L.
W., Jöckel, P., Josse, B., Kinnison, D., Lin, M., Mancini, E., Manyin, M.
E., Marchand, M., Marécal, V., Michou, M., Oman, L. D., Pitari, G.,
Plummer, D. A., Revell, L. E., Saint-Martin, D., Schofield, R., Stenke, A.,
Stone, K., Sudo, K., Tanaka, T. Y., Tilmes, S., Yamashita, Y., Yoshida, K.,
and Zeng, G.: Review of the global models used within phase 1 of the
Chemistry–Climate Model Initiative (CCMI), Geosci. Model Dev., 10, 639–671,
https://doi.org/10.5194/gmd-10-639-2017, 2017.
Nair, P. J., Godin-Beekmann, S., Kuttippurath, J., Ancellet, G., Goutail, F.,
Pazmiño, A., Froidevaux, L., Zawodny, J. M., Evans, R. D., Wang, H. J.,
Anderson, J., and Pastel, M.: Ozone trends derived from the total column and
vertical profiles at a northern mid-latitude station, Atmos. Chem. Phys., 13,
10373–10384, https://doi.org/10.5194/acp-13-10373-2013, 2013.
Nair, P. J., Froidevaux, L., Kuttippurath, J., Zawodny, J. M., Russell III,
J. M., Steinbrecht, W., Claude, H., Leblanc, T., van Gijsel, J. A. E.,
Johnson, B., Swart, D. P. J., Thomas, A., Querel, R., Wang, R., and Anderson,
J.: Subtropical and midlatitude ozone trends in the stratosphere:
Implications for recovery, J. Geophys. Res., 120, 7247–7257,
https://doi.org/10.1002/2014JD022371, 2015.
Nedoluha, G. E., Gomez, R. M., Hicks, B. C., Wrotny, J. E., Boone, C., and
Lambert, A.: Water vapor measurements in the mesosphere from Mauna Loa over
solar cycle 23, J. Geophys. Res., 114, D23303, https://doi.org/10.1029/2009JD012504,
2009.
Nisbet, E. G., Dlugokencky, E. J., Manning, M. R., Lowry, D., Fisher, R. E.,
France, J. L., Michel, S. E., Miller, J. B., White, J. W. C., Vaughn, B.,
Bousquet, P., Pyle, J. A., Warwick, N. J., Cain, M., Brownlow, R., Zazzeri,
G., Lanoisellé, M., Manning, A. C., Gloor, E., Worthy, D. E. J., Brunke,
E.-G., Labuschagne, C., Wolff, E. W., and Ganesan, A. L.: Rising atmospheric
methane: 2007–2014 growth and isotopic shift, Global Biogeochem. Cy., 30,
1356–1370, https://doi.org/10.1002/2016GB005406, 2016.
Oltmans, S. J., Vömel, H., Hofmann, D. J., Rosenlof, K. H., and Kley, D.:
The increase in stratospheric water vapor from balloonborne, frostpoint
hygrometer measurements at Washington, D.C., and Boulder, Colorado, Geophys.
Res. Lett., 27, 3453–3456, 2000.
Oram, D. E., Ashfold, M. J., Laube, J. C., Gooch, L. J., Humphrey, S.,
Sturges, W. T., Leedham-Elvidge, E., Forster, G. L., Harris, N. R. P., Mead,
M. I., Samah, A. A., Phang, S. M., Ou-Yang, C.-F., Lin, N.-H., Wang, J.-L.,
Baker, A. K., Brenninkmeijer, C. A. M., and Sherry, D.: A growing threat to
the ozone layer from short-lived anthropogenic chlorocarbons, Atmos. Chem.
Phys., 17, 11929–11941, https://doi.org/10.5194/acp-17-11929-2017, 2017.
Orsolini, Y. J., Manney, G. L., Santee, M. L., and Randall, C. E.: An upper
stratospheric layer of enhanced HNO3 following exceptional solar
storms, Geophys. Res. Lett., 32, L12S01, https://doi.org/10.1029/2004GL021588, 2005.
Perliski, L. M., Solomon, S., and London, J.: On the interpretation of
seasonal variations of stratospheric ozone, Planet. Space Sci., 37,
1527–1538, 1989.
Popp, P. J., Marcy, T. P., Watts, L. A., Gao, R. S., Fahey, D. W., Weinstock,
E. M., Smith, J. B., Herman, R. L., Troy, R. F., Webster, C. R., Christensen,
L. E., Baumgardner, D. G., Voigt, C., Kärcher, B., Wilson, J. C.,
Mahoney, M. J., Jensen, E. J., and Bui, T. P.: Condensed-phase nitric acid in
a tropical subvisible cirrus cloud, Geophys. Res. Lett., 34, L24812,
https://doi.org/10.1029/2007GL031832, 2007.
Popp, P. J., Marcy, T. P., Gao, R. S., Watts, L. A., Fahey, D. W., Richard,
E. C., Oltmans, S. J., Santee, M. L., Livesey, N. J., Froidevaux, L., Sen,
B., Toon, G. C., Walker, K. A., Boone, C. D., and Bernath, P. F.:
Stratospheric correlation between nitric acid and ozone, J. Geophys. Res.,
114, D03305, https://doi.org/10.1029/2008JD010875, 2009.
Randel, W. J. and Jensen, E. J.: Physical processes in the tropical
tropopause layer and their roles in a changing climate, Nat. Geosci., 6,
169–176, https://doi.org/10.1038/ngeo1733, 2013.
Randel, W. J. and Thompson, A. M.: Interannual variability and trends in
tropical ozone derived from SAGE II satellite data and SHADOZ ozonesondes, J.
Geophys. Res., 116, D07303, https://doi.org/10.1029/2010JD015195, 2011.
Randel, W. J., Wu, F., and Gaffen, D. J.: Interannual variability of the
tropical tropopause derived from radiosonde data and NCEP reanalysis, J.
Geophys. Res., 105, 15509–15523, 2000.
Randel, W. J., Wu, F., Oltmans, S. J., Rosenlof, K., and Nedoluha, G. E.:
Interannual changes of stratospheric water vapor and correlations with
tropical tropopause temperatures, J. Atmos. Sci., 61, 2133–2148, 2004.
Randel, W. J., Wu, F., Vömel, H., Nedoluha, G. E., and Forster, P.:
Decreases in stratospheric water vapor after 2001: Links to changes in the
tropical tropopause and the Brewer–Dobson circulation, J. Geophys. Res.,
111, D12312, https://doi.org/10.1029/2005JD006744, 2006.
Ray, E. A., Holton, J. R., Fishbein, E., Froidevaux, L., and Waters, J.: The
tropical semiannual oscillations in temperature and ozone as observed by the
MLS, J. Atmos. Sci., 51, 3045–3052,
https://doi.org/10.1175/1520-0469(1994)051<3045:TTSOIT?>2.0.CO;2, 1994.
Read, W. G., Lambert, A., Bacmeister, J., Cofield, R. E., Christensen, L. E.,
Cuddy, D. T., Daffer, W. H., Drouin, B. J., Fetzer, E., Froidevaux, L.,
Fuller, R., Herman, R., Jarnot, R. F., Jiang, J. H., Jiang, Y. B., Kelly, K.,
Knosp, B. W., Kovalenko, L. J., Livesey, N. J., Liu, H.-C., Manney, G. L.,
Pickett, H. M., Pumphrey, H. C., Rosenlof, K. H., Sabounchi, X., Santee, M.
L., Schwartz, M. J., Snyder, W. V., Stek, P. C., Su, H., Takacs, L. L.,
Thurstans, R. P., Vömel, H., Wagner, P. A., Waters, J. W., Webster, C.
R., Weinstock, E. M., and Wu, D. L.: Aura Microwave Limb Sounder upper
tropospheric and lower stratospheric H2O and relative humidity with
respect to ice validation, J. Geophys. Res., 112, D24S35,
https://doi.org/10.1029/2007JD008752, 2007.
Read, W. G., Schwartz, M. J., Lambert, A., Su, H., Livesey, N. J., Daffer, W.
H., and Boone, C. D.: The roles of convection, extratropical mixing, and
in-situ freeze-drying in the Tropical Tropopause Layer, Atmos. Chem. Phys.,
8, 6051–6067, https://doi.org/10.5194/acp-8-6051-2008, 2008.
Rienecker, M., Suarez, M. J., Gelaro, R., Todling, R., Bacmeister, J., Liu,
E., Bosilovich, M. G., Schubert, S. D., Takacs, L., Kim, G.-K., Bloom, S.,
Chen, J., Collins, D., Conaty, A., da Silva, A., Gu, W., Joiner, J., Koster,
R. D., Lucchesi, R., Molod, A., Owens, T., Pawson, S., Pegion, P., Redder, C.
R., Reichle, R., Robertson, J., F. R., Ruddick, A. G., Sienkiewicz, M., and
Woollen, J.: MERRA: NASA's Modern-Era Retrospective Analysis for Research and
Applications, J. Climate, 24, 3624–3648, https://doi.org/10.1175/JCLI-D-11-00015.1,
2011.
Rohs, S., Schiller, C., Riese, M., Engel, A., Schmidt, U., Wetter, T., Levin,
I., Nakazawa, T., and Aoki, S.: Long-term changes of methane and hydrogen in
the stratosphere in the period 1978–2003 and their impact on the abundance
of stratospheric water vapor, J. Geophys. Res., 111, D14315,
https://doi.org/10.1029/2005JD006877, 2006.
Rosenlof, K. H. and Reid, G. R.: Trends in the temperature and water vapor
content of the tropical lower stratosphere: Sea surface connection, J.
Geophys. Res., 113, D06107, https://doi.org/10.1029/2007JD009109, 2008.
Ryan, N. J., Kinnison, D. E., Garcia, R. R., Hoffmann, C. G., Palm, M.,
Raffalski, U., and Notholt, J.: Assessing the ability to derive rates of
polar middle-atmospheric descent using trace gas measurements from remote
sensors, Atmos. Chem. Phys., 18, 1457–1474,
https://doi.org/10.5194/acp-18-1457-2018, 2018.
Sakazaki, T., Shiotani, M., Suzuki, M., Kinnison, D., Zawodny, J. M., McHugh,
M., and Walker, K. A.: Sunset–sunrise difference in solar occultation ozone
measurements (SAGE II, HALOE, and ACE-FTS) and its relationship to tidal
vertical winds, Atmos. Chem. Phys., 15, 829–843,
https://doi.org/10.5194/acp-15-829-2015, 2015.
Santee, M. L., Lambert, A., Read, W. G., Livesey, N. J., Cofield, R. E.,
Cuddy, D. T., Daffer, W. H., Drouin, B. J., Froidevaux, L., Fuller, R. A.,
Jarnot, R. F., Knosp, B. W., Manney, G. L., Perun, V. S., Snyder, W. V.,
Stek, P. C., Thurstans, R. P., Wagner, P. A., Waters, J. W., Muscari, G., de
Zafra, R. L., Dibb, J. E., Fahey, D. W., Popp, P. J., Marcy, T. P., Jucks, K.
W., Toon, G. C., Stachnik, R. A., Bernath, P. F., Boone, C. D., Walker, K.A.,
Urban, J., and Murtagh, D.: Validation of the Aura Microwave Limb Sounder
HNO3 measurements, J. Geophys. Res., 112, D24S40,
https://doi.org/10.1029/2007JD008, 2007.
Santer, B. D., Wigley, T. M. L., Boyle, J. S., Gaffen, D. J., Hnilo, J. J.,
Nychka, D., Parker, D. E., and Taylor, K. E.: Statistical significance of
trends and trend differences in layer-average atmospheric temperature time
series, J. Geophys. Res., 105, 7337–7356, 2000.
Schaefer, H., Mikaloff Fletcher, S. E., Veidt, C., Lassey, K. R., Brailsford,
G. W., Bromley, T. M., Dlugokencky, E. J., Michel, S. E., Miller, J. B.,
Levin, I., Lowe, D. C., Martin, R. J., Vaughn, B. H., and White, J. W. C.: A
21st century shift from fossil-fuel to biogenic methane emissions indicated
by 13CH4, Science, 352, 80–84, https://doi.org/10.1126/science.aad2705, 2016.
Scherer, M., Vömel, H., Fueglistaler, S., Oltmans, S. J., and Staehelin,
J.: Trends and variability of midlatitude stratospheric water vapour deduced
from the re-evaluated Boulder balloon series and HALOE, Atmos. Chem. Phys.,
8, 1391–1402, https://doi.org/10.5194/acp-8-1391-2008, 2008.
Schoeberl, M. R., Douglass, A. R., Newman, P. A., Lait, L. R., Lary, D.,
Waters, J., Livesey, N., Froidevaux, L., Lambert, A., Read,W., Filipiak, M.
J., and Pumphrey, H. C.: QBO and annual cycle variations in tropical lower
stratosphere trace gases from HALOE and Aura MLS observations, J. Geophys.
Res., 113, D05301, https://doi.org/10.1029/2007JD008678, 2008.
Schoeberl, M. R., Dessler, A. E., and Wang, T.: Modeling upper tropospheric
and lower stratospheric water vapor anomalies, Atmos. Chem. Phys., 13,
7783–7793, https://doi.org/10.5194/acp-13-7783-2013, 2013.
Smith, A. K., Garcia, R. R., Moss, A. C., and Mitchell, N. J.: The semiannual
oscillation of the tropical zonal wind in the middle atmosphere derived from
satellite geopotential height retrievals, J. Atmos. Sci., 74, 2413–2425,
https://doi.org/10.1175/JAS-D-17-0067.1, 2017.
Solomon, S., Kinnison, D. E., Bandoro, J., and Garcia, R.: Simulations of
Polar Ozone Depletion: An Update, J. Geophys. Res., 120, 7958–7974,
https://doi.org/10.1002/2015JD0233652015, 2015.
Solomon, S., Ivy, D. J., Kinnison, D., Mills, M. J., Neely III, R. R., and
Schmidt, A.: Emergence of healing in the Antarctic ozone layer, Science, 353,
269–274, 2016.
SPARC: SPARC CCMVal Report on the Evaluation of Chemistry-Climate Models,
edited by: Eyring, V., Shepherd, T., and Waugh, D., SPARC Report No. 5,
WCRP-30/2010, WMO/TD – No. 40, available at:
https://www.sparc-climate.org/publications/sparc-reports/ (last access:
31 January 2012), 2010.
SPARC: The SPARC Data Initiative: Assessment of stratospheric trace gas and
aerosol climatologies from satellite limb sounders, edited by: Hegglin, M. I.
and Tegtmeier, S.: SPARC Report No. 8, WCRP-05/2017,
https://doi.org/10.3929/ethz-a-010863911, 2017.
Steinbrecht, W., Froidevaux, L., Fuller, R., Wang, R., Anderson, J., Roth,
C., Bourassa, A., Degenstein, D., Damadeo, R., Zawodny, J., Frith, S.,
McPeters, R., Bhartia, P., Wild, J., Long, C., Davis, S., Rosenlof, K.,
Sofieva, V., Walker, K., Rahpoe, N., Rozanov, A., Weber, M., Laeng, A., von
Clarmann, T., Stiller, G., Kramarova, N., Godin-Beekmann, S., Leblanc, T.,
Querel, R., Swart, D., Boyd, I., Hocke, K., Kämpfer, N., Maillard Barras,
E., Moreira, L., Nedoluha, G., Vigouroux, C., Blumenstock, T., Schneider, M.,
García, O., Jones, N., Mahieu, E., Smale, D., Kotkamp, M., Robinson, J.,
Petropavlovskikh, I., Harris, N., Hassler, B., Hubert, D., and Tummon, F.: An
update on ozone profile trends for the period 2000 to 2016, Atmos. Chem.
Phys., 17, 10675–10690, https://doi.org/10.5194/acp-17-10675-2017, 2017.
Stiller, G. P., Mengistu Tsidu, G., von Clarmann, T., Glatthor, N.,
Höpfner, M., Kellmann, S., Linden, A., Ruhnke, R., Fischer, H.,
Lopez-Puertas, M., Funke, B., and Gil-Lopez, S.: An enhanced HNO3
second maximum in the Antarctic midwinter upper stratosphere 2003, J.
Geophys. Res., 110, D20303, https://doi.org/10.1029/2005JD006011, 2005.
Stolarski, R. S., Douglass, A. R., and Strahan, S. E.: Using satellite
measurements of N2O to remove dynamical variability from HCl
measurements, Atmos. Chem. Phys., 18, 5691–5697,
https://doi.org/10.5194/acp-18-5691-2018, 2018.
Stone, K. A., Solomon, S., and Kinnison, D. E.: On the identification of
ozone recovery, Geophys. Res. Lett., 45, 5158–5165,
https://doi.org/10.1029/2018GL077955, 2018.
Tegtmeier, S., Hegglin, M. I., Anderson, J., Bourassa, A., Brohede, S.,
Degenstein, D., Froidevaux, L., Fuller, R., Funke, B., Gille, J., Jones, A.,
Kasai, Y., Krüger, K., Kyrölä, E., Lingenfelser, G., Lumpe, J.,
Nardi, B., Neu, J., Pendlebury, D., Remsberg, E., Rozanov, A., Smith, L.,
Toohey, M., Urban, J., von Clarmann, T., Walker, K. A., and Wang, H. J.: The
SPARC Data Initiative: A comparison of ozone climatologies from international
satellite limb sounders, J. Geophys. Res.-Atmos., 118, 12229–12247,
doi: 10.1002/2013JD019877, 2013.
Tian, W. and Chipperfield, M. P.: Stratospheric water vapor trends in a
coupled chemistry-climate model, Geophys. Res. Lett., 33, L06819,
https://doi.org/10.1029/2005GL024675, 2006.
Tiao, G. C., Reinsel, G. C., Xu, D., Pedrick, J. H., Zhu, X., Miller, A. J.,
DeLuisi, J. J., Mateer, C. L., and Wuebbles, D. J.: Effects of
autocorrelation and temporal sampling schemes on estimates of trend and
spatial correlation, J. Geophys Res., 95, 20507–20517, 1990.
Tilmes, S., Lamarque, J.-F., Emmons, L. K., Kinnison, D. E., Marsh, D.,
Garcia, R. R., Smith, A. K., Neely, R. R., Conley, A., Vitt, F., Val Martin,
M., Tanimoto, H., Simpson, I., Blake, D. R., and Blake, N.: Representation of
the Community Earth System Model (CESM1) CAM4-chem within the
Chemistry-Climate Model Initiative (CCMI), Geosci. Model Dev., 9, 1853–1890,
https://doi.org/10.5194/gmd-9-1853-2016, 2016.
Toohey, M., Hegglin, M. I., Tegtmeier, S., Anderson, J., Añel, J. A.,
Bourassa, A., Brohede, S., Degenstein, D., Froidevaux, L., Fuller, R., Funke,
B., Gille, J., Jones, A., Kasai, Y., Krüger, K., Kyrölä, E., Neu,
J. L., Rozanov, A., Smith, L., Urban, J., von Clarmann, T., Walker, K. A.,
and Wang, R.: Characterizing sampling bias in the trace gas climatologies of
the SPARC Data Initiative, J. Geophys. Res.-Atmos., 118, 11847–11862,
https://doi.org/10.1002/jgrd.5087, 2013.
Tummon, F., Hassler, B., Harris, N. R. P., Staehelin, J., Steinbrecht, W.,
Anderson, J., Bodeker, G. E., Bourassa, A., Davis, S. M., Degenstein, D.,
Frith, S. M., Froidevaux, L., Kyrölä, E., Laine, M., Long, C.,
Penckwitt, A. A., Sioris, C. E., Rosenlof, K. H., Roth, C., Wang, H.-J., and
Wild, J.: Intercomparison of vertically resolved merged satellite ozone data
sets: interannual variability and long-term trends, Atmos. Chem. Phys., 15,
3021-3043, https://doi.org/10.5194/acp-15-3021-2015, 2015.
Turner, A. J., Frankenberg, C., Wennberg, P. O., and Jacob, D. J.: Ambiguity
in the causes for decadal trends in atmospheric methane and hydroxyl, P.
Natl. Acad. Sci. USA, 114, 5367–5372, https://doi.org/10.1073/pnas.1616020114, 2017.
Urban, J., Lossow, S., Stiller, G., and Read, W.: Another drop in water
vapor, EOS T. Am. Geophys. Un., 95, 245–252, https://doi.org/10.1002/2014EO270001, 2014.
Verronen, P. T., Santee, M. L., Manney, G. L., Lehmann, R., Salmi, S.-M., and
Seppälä, A.: Nitric acid enhancements in the mesosphere during the
January 2005 and December 2006 solar proton events, J. Geophys. Res., 116,
D17301, https://doi.org/10.1029/2011JD016075, 2011.
von Clarmann, T., Glatthor, N., Höpfner, M., Kellmann, S., Ruhnke, R.,
Stiller, G. P., and Fischer, H.: Experimental evidence of perturbed odd
hydrogen and chlorine chemistry after the October 2003 solar proton events,
J. Geophys. Res., 110, A09S45, https://doi.org/10.1029/2005JA011053, 2005.
Vömel, H., Barnes, J. E., Forno, R. N., Fujiwara, M., Hasebe, F.,
Iwasaki, S., Kivi, R., Komala, N., Kyrölä, E., Leblanc, T., Morel,
B., Ogino, S.-Y., Read, W. G., Ryan, S. C., Saraspriya, S., Selkirk, H.,
Shiotani, M., Valverde Canossa, J., and Whiteman, D. N.: Validation of Aura
Microwave Limb Sounder water vapor by balloon-borne Cryogenic Frost point
Hygrometer measurements, J. Geophys. Res., 112, D24S37,
https://doi.org/10.1029/2007JD008698, 2007.
Wang, R., Froidevaux, L., Anderson, J., Fuller, R. A., Bernath, P. F., McCormick, M. P.,
Livesey, N. J., Russell III, J. M., Walker, K. A., and Zawodny, J. M.: GOZCARDS
Merged Ozone 1 month L3 10 degree Zonal Means on a Vertical Pressure Grid V1.01,
Greenbelt, MD, USA, Goddard Earth Sciences Data and Information Services Center
(GES DISC), https://doi.org/10.5067/MEASURES/GOZCARDS/DATA3006, 2013.
Waters, J. W., Froidevaux, L., Harwood, R. S., Jarnot, R. F., Pickett, H. M.,
Read, W. G., Siegel, P. H., Cofield, R. E., Filipiak, M. J., Flower, D. A.,
Holden, J. R., Lau, G. K., Livesey, N. J., Manney, G. L., Pumphrey, H. C.,
Santee, M. L., Wu, D. L., Cuddy, D. T., Lay, R. R., Loo, M. S., Perun, V. S.,
Schwartz, M. J., Stek, P. C., Thurstans, R. P., Boyles, M. A., Chandra, S.,
Chavez, M. C., Chen, G.-S., Chudasama, B. V., Dodge, R., Fuller, R. A.,
Girard, M. A., Jiang, J. H., Jiang, Y., Knosp, B. W., LaBelle, R. C., Lam, J.
C., Lee, K. A., Miller, M., Oswald, J. E., Patel, N. C., Pukala, D. M.,
Quintero, O., Scaff, D. M., Snyder, W. V., Tope, M. C., Wagner, P. A., and
Walch, M. J.: The Earth Observing System Microwave Limb Sounder (EOS MLS) on
the Aura satellite, IEEE T. Geosci. Remote, 44, 1075–1092,
https://doi.org/10.1109/TGRS.2006.873771, 2006.
Waugh, D. W. and Eyring, V.: Quantitative performance metrics for
stratospheric-resolving chemistry-climate models, Atmos. Chem. Phys., 8,
5699–5713, https://doi.org/10.5194/acp-8-5699-2008, 2008.
Waugh, D. W., Considine, D. B., and Fleming, E. L.: Is upper stratospheric
chlorine decreasing as expected?, Geophys. Res. Lett., 28, 1187–1190,
https://doi.org/10.1029/2000GL011745, 2001.
Weatherhead, E. C., Reinsel, G. C., Tiao, G. C., Meng, X.-L., Choi, D.,
Cheang, W.-K., Keller, T., DeLuisi, J., Wuebbles, D. J., Kerr, J. B., Miller,
A. J., Oltmans, S. J., and Frederick, J. E.: Factors affecting the detection
of trends: Statistical considerations and applications to environmental data,
J. Geophys. Res.-Atmos., 103, 17149–17161, https://doi.org/10.1029/98JD00995, 1998.
Wegner, T., Kinnison, D. E., Garcia, R. R., and Solomon, S.: Simulation of
polar stratospheric clouds in the specified dynamics version of the whole
atmosphere community climate model, J. Geophys. Res., 4991–5002,
https://doi.org/10.1002/jgrd.50415, 2013.
Wilka, C., Shah, K., Stone, K., Solomon, S., Kinnison, D., Mills, M.,
Schmidt, A., and Neely, R. R., III: The role of heterogeneous chemistry in
ozone depletion and recovery, Geophys. Res. Lett., 45, 7835–7842,
https://doi.org/10.1029/2018GL078596, 2018.
WMO: Scientific Assessment of Ozone Depletion: 2014, Global Ozone Research
and Monitoring Project-Report No. 55, WMO (World Meteorological
Organization), Geneva, Switzerland, available at:
https://www.esrl.noaa.gov/csd/assessments/ozone (last access: 31
January 2016), 2014.
Wolter, K. and Timlin, M. S.: Monitoring ENSO in COADS with a seasonally
adjusted principal component index, in: Proceedings of the 17th Climate
Diagnostics Workshop, Norman, OK, NOAA/NMC/CAC, NSSL, Oklahoma Climate
Survey, CIMMS and the School of Meteorology, University of Oklahoma, Norman,
OK, 52–57, 1993.
Wolter, K. and Timlin, M. S.: Measuring the strength of ENSO events – how
does 1997/98 rank?, Weather, 53, 315–324,
https://doi.org/10.1002/j.1477-8696.1998.tb06408.x, 1998.
Short summary
This work evaluates two versions of a 3-D global model of upper-atmospheric composition for recent decades. The two versions differ mainly in their dynamical (wind) constraints. Model–data differences, variability, and trends in five gases (ozone, H2O, HCl, HNO3, and N2O) are compared. While the match between models and observations is impressive, a few areas of discrepancy are noted. This work also updates trends in composition based on recent satellite-based measurements (through 2018).
This work evaluates two versions of a 3-D global model of upper-atmospheric composition for...
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