Articles | Volume 21, issue 10
https://doi.org/10.5194/acp-21-7451-2021
© Author(s) 2021. 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-21-7451-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
18 May 2021
Research article |
| 18 May 2021
| 18 May 2021
Is our dynamical understanding of the circulation changes associated with the Antarctic ozone hole sensitive to the choice of reanalysis dataset?
Andrew Orr
CORRESPONDING AUTHOR
Atmosphere, Ice and Climate, British Antarctic Survey, Cambridge,
United Kingdom
Atmosphere, Ice and Climate, British Antarctic Survey, Cambridge,
United Kingdom
Patrick Martineau
Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
Edwin P. Gerber
Courant Institute of Mathematical Sciences, New York University, New York, NY, United States
Gareth J. Marshall
Atmosphere, Ice and Climate, British Antarctic Survey, Cambridge,
United Kingdom
Thomas J. Bracegirdle
Atmosphere, Ice and Climate, British Antarctic Survey, Cambridge,
United Kingdom
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The Cryosphere, 18, 683–703, https://doi.org/10.5194/tc-18-683-2024, https://doi.org/10.5194/tc-18-683-2024, 2024
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Antarctic precipitation is a crucial component of the climate system. Its spatio-temporal variability impacts sea level changes and the interpretation of water isotope measurements in ice cores. To better understand its climatic drivers, we developed water tracers in an atmospheric model to identify moisture source conditions from which precipitation originates. We find that mid-latitude surface winds exert an important control on moisture availability for Antarctic precipitation.
Patrick Martineau, Swadhin K. Behera, Masami Nonaka, Hisashi Nakamura, and Yu Kosaka
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The representation of subweekly near-surface temperature variability trends over the Southern Hemisphere landmasses is compared across multiple atmospheric reanalyses. It is found that there is generally a good agreement concerning the positive trends affecting South Africa and Australia in the spring, and South America in the summer. A more efficient generation of subweekly temperature variance by horizontal temperature fluxes contributes to the observed rise.
Paul R. Holland, Gemma K. O'Connor, Thomas J. Bracegirdle, Pierre Dutrieux, Kaitlin A. Naughten, Eric J. Steig, David P. Schneider, Adrian Jenkins, and James A. Smith
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The Antarctic Ice Sheet is losing ice, causing sea-level rise. However, it is not known whether human-induced climate change has contributed to this ice loss. In this study, we use evidence from climate models and palaeoclimate measurements (e.g. ice cores) to suggest that the ice loss was triggered by natural climate variations but is now sustained by human-forced climate change. This implies that future greenhouse-gas emissions may influence sea-level rise from Antarctica.
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Jeremy Carter, Amber Leeson, Andrew Orr, Christoph Kittel, and J. Melchior van Wessem
The Cryosphere, 16, 3815–3841, https://doi.org/10.5194/tc-16-3815-2022, https://doi.org/10.5194/tc-16-3815-2022, 2022
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Climate models provide valuable information for studying processes such as the collapse of ice shelves over Antarctica which impact estimates of sea level rise. This paper examines variability across climate simulations over Antarctica for fields including snowfall, temperature and melt. Significant systematic differences between outputs are found, occurring at both large and fine spatial scales across Antarctica. Results are important for future impact assessments and model development.
Nicolaj Hansen, Sebastian B. Simonsen, Fredrik Boberg, Christoph Kittel, Andrew Orr, Niels Souverijns, J. Melchior van Wessem, and Ruth Mottram
The Cryosphere, 16, 711–718, https://doi.org/10.5194/tc-16-711-2022, https://doi.org/10.5194/tc-16-711-2022, 2022
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We investigate the impact of different ice masks when modelling surface mass balance over Antarctica. We used ice masks and data from five of the most used regional climate models and a common mask. We see large disagreement between the ice masks, which has a large impact on the surface mass balance, especially around the Antarctic Peninsula and some of the largest glaciers. We suggest a solution for creating a new, up-to-date, high-resolution ice mask that can be used in Antarctic modelling.
Ayako Yamamoto, Masami Nonaka, Patrick Martineau, Akira Yamazaki, Young-Oh Kwon, Hisashi Nakamura, and Bunmei Taguchi
Weather Clim. Dynam., 2, 819–840, https://doi.org/10.5194/wcd-2-819-2021, https://doi.org/10.5194/wcd-2-819-2021, 2021
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While the key role of moist processes in blocking has recently been highlighted, their moisture sources remain unknown. Here, we investigate moisture sources for wintertime Euro-Atlantic blocks using a Lagrangian method. We show that the Gulf Stream, Kuroshio, and their extensions, along with the northeast of Hawaii, act as the primary moisture sources and springboards for particle ascent. We find that the evolution of the particle properties is sensitive to the moisture sources.
Ruth Mottram, Nicolaj Hansen, Christoph Kittel, J. Melchior van Wessem, Cécile Agosta, Charles Amory, Fredrik Boberg, Willem Jan van de Berg, Xavier Fettweis, Alexandra Gossart, Nicole P. M. van Lipzig, Erik van Meijgaard, Andrew Orr, Tony Phillips, Stuart Webster, Sebastian B. Simonsen, and Niels Souverijns
The Cryosphere, 15, 3751–3784, https://doi.org/10.5194/tc-15-3751-2021, https://doi.org/10.5194/tc-15-3751-2021, 2021
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We compare the calculated surface mass budget (SMB) of Antarctica in five different regional climate models. On average ~ 2000 Gt of snow accumulates annually, but different models vary by ~ 10 %, a difference equivalent to ± 0.5 mm of global sea level rise. All models reproduce observed weather, but there are large differences in regional patterns of snowfall, especially in areas with very few observations, giving greater uncertainty in Antarctic mass budget than previously identified.
Patrick Martineau, Hisashi Nakamura, and Yu Kosaka
Weather Clim. Dynam., 2, 395–412, https://doi.org/10.5194/wcd-2-395-2021, https://doi.org/10.5194/wcd-2-395-2021, 2021
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To better understand the factors that impact the weather in North America, this study explores the influence of the El Niño–Southern Oscillation on wintertime surface air temperature variability using reanalysis data. Results show that La Niña enhances subseasonal variability over western North America by amplifying the baroclinic conversion of energy from the winter-mean circulation to subseasonal eddies. Changes in the structural properties of eddies are crucial for this amplification.
Andrew Orr, J. Scott Hosking, Aymeric Delon, Lars Hoffmann, Reinhold Spang, Tracy Moffat-Griffin, James Keeble, Nathan Luke Abraham, and Peter Braesicke
Atmos. Chem. Phys., 20, 12483–12497, https://doi.org/10.5194/acp-20-12483-2020, https://doi.org/10.5194/acp-20-12483-2020, 2020
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Polar stratospheric clouds (PSCs) are clouds found in the Antarctic winter stratosphere and are implicated in the formation of the ozone hole. These clouds can sometimes be formed or enhanced by mountain waves, formed as air passes over hills or mountains. However, this important mechanism is missing in coarse-resolution climate models, limiting our ability to simulate ozone. This study examines an attempt to include the effects of mountain waves and their impact on PSCs and ozone.
Cited articles
Arblaster, J. M. and Meehl, G. A.: Contributions of external forcings to
Southern Annular Mode trends, J. Climate, 19, 2896–2905,
https://doi.org/10.1175/JCLI3774.1, 2006.
Banerjee, A., Fyfe, J. C., Polvani, L. M., Waugh, D., and Chang, K.-L.: A
pause in Southern Hemisphere circulation trends due to the Montreal
Protocol, Nature, 579, 544–548, https://doi.org/10.1038/s41586-020-2120-4, 2020.
Bengtsson, L., Arkin, P., Berrisford, P., Bougeault, P., Folland, C. K.,
Gordon, C., Haines, K., Hodges, K. I., Jones, P., Kallberg, P., Rayner, N.,
Simmons, A. J., Stammer, D., Thorne, P. W., Uppala, S., and Vose, R. S.: The
Need for a Dynamical Climate Reanalysis, B. Am. Meteorol. Soc., 88,
495–502, https://doi.org/10.1175/BAMS-88-4-495, 2007.
Black, R. X. and McDaniel, B. A.: Interannual variability in the Southern
Hemisphere circulation organized by stratospheric final warming events, J. Atmos. Sci., 64, 2968–2974, https://doi.org/10.1175/JAS3979.1, 2007.
Charron, M. and Manzini, E.: Gravity waves from fronts: Parameterization
and middle atmosphere response in a general circulation model, J. Atmos. Sci., 59, 923–941, https://doi.org/10.1175/1520-0469(2002)059<0923:GWFFPA>2.0.CO;2, 2002.
Chemke, R. and Polvani, L. M.: Linking midlatitudes eddy heat flux trends
and polar amplification, NPJ Clim. Atmos. Sci., 3, 8,
https://doi.org/10.1038/s41612-020-0111-7, 2020.
Chen, G. and Held, I. M.: Phase speed spectra and the recent poleward shift
of Southern Hemisphere surface westerlies, Geophys. Res. Lett., 34, L21805,
https://doi.org/10.1029/2007GL031200, 2007.
Chen, P. and Robinson, W. A.: Propagation of planetary waves between the
troposphere and stratosphere, J. Atmos. Sci., 49, 2533–2545,
https://doi.org/10.1175/1520-0469(1992)049<2533:POPWBT>2.0.CO;2, 1992.
Christiansen, B.: Stratospheric vacillations in a general circulation model,
J. Atmos. Sci., 56, 1858–1872, https://doi.org/10.1175/1520-0469(1999)056<1858:SVIAGC>2.0.CO;2, 1999.
Christiansen, B.: Downward propagation of zonal mean zonal wind anomalies
from the stratosphere to the troposphere: Model and reanalysis, J. Geophys.
Res.-Atmos., 106, 27307–27322, https://doi.org/10.1029/2000JD000214, 2001.
Davis, S. M., Hegglin, M. I., Fujiwara, M., Dragani, R., Harada, Y., Kobayashi, C., Long, C., Manney, G. L., Nash, E. R., Potter, G. L., Tegtmeier, S., Wang, T., Wargan, K., and Wright, J. S.: Assessment of upper tropospheric and stratospheric water vapor and ozone in reanalyses as part of S-RIP, Atmos. Chem. Phys., 17, 12743–12778, https://doi.org/10.5194/acp-17-12743-2017, 2017.
Deb, P., Orr, A., Bromwich, D. H., Nicholas, J. P., Turner, J., and Hosking,
J. S.: Summer drivers of atmospheric variability affecting ice shelf
thinning in the Amundsen Sea Embayment, West Antarctica, Geophys. Res.
Lett., 45, 4124–4133, https://doi.org/10.1029/2018GL077092, 2018.
Dong, X., Wang, Y., Hou, S., Ding, M., Yin, B., and Zhang, Y.: Robustness of
the recent global atmospheric reanalyses for Antarctic near-surface wind
speed climatology, J. Climate, 33, 4027–4043,
https://doi.org/10.1175/JCLI-D-19-0648.1, 2020.
Edmon, H. J., Hoskins, B. J., and McIntyre, M. E.: Eliassen-Palm Cross
Sections for the Troposphere, J. Atmos. Sci., 37, 2600–2616,
https://doi.org/10.1175/1520-0469(1980)037<2600:EPCSFT>2.0.CO;2, 1980.
Fujiwara, M., Wright, J. S., Manney, G. L., Gray, L. J., Anstey, J., Birner, T., Davis, S., Gerber, E. P., Harvey, V. L., Hegglin, M. I., Homeyer, C. R., Knox, J. A., Krüger, K., Lambert, A., Long, C. S., Martineau, P., Molod, A., Monge-Sanz, B. M., Santee, M. L., Tegtmeier, S., Chabrillat, S., Tan, D. G. H., Jackson, D. R., Polavarapu, S., Compo, G. P., Dragani, R., Ebisuzaki, W., Harada, Y., Kobayashi, C., McCarty, W., Onogi, K., Pawson, S., Simmons, A., Wargan, K., Whitaker, J. S., and Zou, C.-Z.: Introduction to the SPARC Reanalysis Intercomparison Project (S-RIP) and overview of the reanalysis systems, Atmos. Chem. Phys., 17, 1417–1452, https://doi.org/10.5194/acp-17-1417-2017, 2017.
Gelaro, R., McCarty, W., Suarez, M. J., Todling, R., Molod, A., Takacs, L.,
Randles, C. A., Darmenov, A., Bosilovich, M. G., Reichle, R., Wargan, K.,
Coy, L., Cullather, R., Draper, C., Akella, S., Buchard, V., Conaty, A., da Silva, A. M., Gu, W., Kim, G.-K., Koster, R., Lucchesi, R., Merkova, D.,
Nielsen, J. E., Partyka, G., Pawson, S., Putman, W., Rienecker, M.,
Schubert, S. D., Sienkiewicz, M., and Zhao, B.: The Modern-Era Retrospective
Analysis for Research and Applications, Version 2 (MERRA-2), J. Climate, 30,
5419–5454, https://doi.org/10.1175/JCLI-D-16-0758.1, 2017.
Gerber, E. P. and Martineau, P.: Quantifying the variability of the annular modes: reanalysis uncertainty vs. sampling uncertainty, Atmos. Chem. Phys., 18, 17099–17117, https://doi.org/10.5194/acp-18-17099-2018, 2018.
Gerber, E. P. and Vallis, G. K.: Eddy-zonal flow interactions and the
persistence of the zonal index, J. Atmos. Sci., 64, 3296–3311,
https://doi.org/10.1175/JAS4006.1, 2007.
Gerber, E. P., Martineau, P., Ayarzaguena, B., Barriopedro, D., Bracegirdle,
T. J., Butler, A. H., Calvo, N., Hardiman, S. C., Hitchcock, P., Iza, M.,
Langematz, U., Lua, H., Marshall, G., Orr, A., Palmeiro, F. M., Son, S.-W.,
and Taguchi, M.: Extratropical Stratosphere-troposphere Coupling, in:
Stratosphere-troposphere Processes and their Role in Climate (SPARC) Reanalysis Intercomparison Project (S-RIP), edited by: Fujiwara, M., Manney, G. L., Gray, L., and Wright, J. S., SPARC, Oberpfaffenhofen Germany, in press, 2021.
Gillett, N. P., Kell, T. D., and Jones, P. D.: Regional climate impacts of
the Southern Annular Mode, Geophys. Res. Lett., 33, L23704,
https://doi.org/10.1029/2006GL027721, 2006.
Harnik, N., Perlwitz, J., and Shaw, T. A.: Observed decadal changes in
downward wave coupling between the stratosphere and the troposphere in the
Southern Hemisphere, J. Climate, 24, 4558–4569, https://doi.org/10.1175/2011JCLI4118.1,
2011.
Hartmann, D. L. and Lo, F.: Wave-driven zonal flow vacillation in the
Southern Hemisphere, J. Atmos. Sci., 55, 1303–1315,
https://doi.org/10.1175/1520-0469(1998)055<1303:WDZFVI>2.0.CO;2, 1998.
Hartmann, D. L., Wallace, J. M., Limpasuvan, V., Thompson, D. W. J., and
Holton, J. R.: Can ozone depletion and global warming interact to produce
rapid climate change?, P. Natl. Acad. Sci. USA, 97, 1412–1417,
https://doi.org/10.1073/pnas.97.4.1412, 2000.
Held, I. M. and Phillipps, P. J.: Sensitivity of the eddy momentum
flux to meridional resolution in atmospheric GCMs, J. Climate, 6, 499–507,
https://doi.org/10.1175/1520-0442(1993)006<0499:SOTEMF>2.0.CO;2, 1993.
Hersbach, H., Bell, B., Berrisford, P., Hirahara, S., Horanyi, A.,
Munoz-Sabater, J., Nicolas, J., Peubey, C., Radu, R., Schepers, D., Simmons,
A., Soci, C., Abdalla, S., Abellan, X., Balsamo, G., Bechtold, P., Biavati,
G., Bidlot, J., Bonavita, M., De Chiara, G., Dahlgren, P., Dee, D.,
Diamantakis, M., Dragani, R., Flemming, J., Forbes, R., Fuentes, M., Geer,
A., Haimberger, L., Healy, S., Hogan, R. J., Holm, E., Janiskova, M., Keely,
S., Laloyaux, P., Lopez, P., Lupu, C., Radnoti, G., de Rosnay, P., Rozum,
I., Vamborg, F., Villaume, S., and Thepaut, J.-N.: The ERA5 global
reanalysis, Q. J. Roy. Meteor. Soc., 146, 1999–2049, https://doi.org/10.1002/qj.3803, 2020.
Hoffmann, L., Grimsdell, A. W., and Alexander, M. J.: Stratospheric gravity waves at Southern Hemisphere orographic hotspots: 2003–2014 AIRS/Aqua observations, Atmos. Chem. Phys., 16, 9381–9397, https://doi.org/10.5194/acp-16-9381-2016, 2016.
Hu, D., Tian, W., Xie, F., Wang, C., and Zhang, J.: Impacts of stratospheric
ozone depletion and recovery on wave propagation in the boreal winter
stratosphere, J. Geophys. Res.-Atmos., 120, 8299–8317, https://doi.org/10.1002/2014JD022855, 2015.
Huck, P. E., Tilmes, S., Bodeker, G. E., Randel, W. J., McDonald, A. J., and
Nakajima, H.: An improved measure of ozone depletion in the Antarctic
stratosphere, J. Geophys. Res.-Atmos., 112, D11104, https://doi.org/10.1029/2006JD007860, 2007.
Iglesias-Suarez, F., Young, P. J., and Wild, O.: Stratospheric ozone change and related climate impacts over 1850–2100 as modelled by the ACCMIP ensemble, Atmos. Chem. Phys., 16, 343–363, https://doi.org/10.5194/acp-16-343-2016, 2016.
Keeble, J., Braesicke, P., Abraham, N. L., Roscoe, H. K., and Pyle, J. A.: The impact of polar stratospheric ozone loss on Southern Hemisphere stratospheric circulation and climate, Atmos. Chem. Phys., 14, 13705–13717, https://doi.org/10.5194/acp-14-13705-2014, 2014.
Kistler, R., Collins, W., Saha, S., White, G., Woollen, J., Kalnay, E.,
Chelliah, M., Ebisuzaki, W., Kanamitsu, M., Kousky, V., van den Dool, H.,
Jenne, R., and Fiorino, M.: The NCEP–NCAR 50 year reanalysis: monthly means
CD-ROM and documentation, B. Am. Meteorol. Soc., 82, 247–267, 2001.
Kobayashi, S., Matricardi, M., Dee, D., and Uppala, S.: Toward a consistent
reanalysis of the upper stratosphere based on radiance measurements from SSU
and AMSU-A, Q. J. Roy. Meteor. Soc., 135, 2086–2099, https://doi.org/10.1002/qj.514, 2009.
Kobayashi, S., Ota, Y., Harada, Y., Ebita, A., Moriya, M., Onoda, H., Onogi,
K., Kamahori, H., Kobayashi, C., Endo, H., Miyaoka, K., and Takahashi, K.:
2015: The JRA-55 Reanalysis: General Specifications and Basic
Characteristics, J. Meteorol. Soc. Jpn., 93, 5–48,
https://doi.org/10.2151/jmsj.2015-001, 2015.
Kodera, K. and Kuroda, Y.: Dynamical response to the solar cycle, J.
Geophys. Res.-Atmos., 107, 4749, https://doi.org/10.1029/2002JD002224, 2002.
Lawless, A. S.: A note on the analysis error associated with 3D-FGAT,
Q. J. Roy. Meteor. Soc., 136, 1094–1098, https://doi.org/10.1002/qj.619, 2010.
Lawrence, Z. D., Manney, G. L., Minschwaner, K., Santee, M. L., and Lambert, A.: Comparisons of polar processing diagnostics from 34 years of the ERA-Interim and MERRA reanalyses, Atmos. Chem. Phys., 15, 3873–3892, https://doi.org/10.5194/acp-15-3873-2015, 2015.
Limpasuvan, V., Thompson, D. W. J., and Hartmann, D. L.: The life cycle of
the Northern Hemisphere sudden stratospheric warmings, J. Climate, 17,
2548–2596, https://doi.org/10.1175/1520-0442(2004)017<2584:TLCOTN>2.0.CO;2, 2004.
Long, C. S., Fujiwara, M., Davis, S., Mitchell, D. M., and Wright, C. J.: Climatology and interannual variability of dynamic variables in multiple reanalyses evaluated by the SPARC Reanalysis Intercomparison Project (S-RIP), Atmos. Chem. Phys., 17, 14593–14629, https://doi.org/10.5194/acp-17-14593-2017, 2017.
Lorenz, D. J. and Hartmann, D. L.: Eddy-zonal flow feedback in the Southern
Hemisphere, J. Atmos. Sci., 58, 3312–3327,
https://doi.org/10.1175/1520-0469(2001)058<3312:EZFFIT>2.0.CO;2, 2001.
Lott, F. and Miller, M. J.: A new subgrid-scale orographic drag
parametrization: Its formulation and testing, Q. J. Roy. Meteor. Soc.,
123, 101–127, https://doi.org/10.1002/qj.49712353704, 1997.
Lu, H., Bracegirdle, T. J., Phillips, T., and Turner, J.: A Comparative
Study of Wave Forcing Derived from the ERA-40 and ERA-Interim Reanalysis
Datasets, J. Climate, 28, 2291–2311, https://doi.org/10.1175/JCLI-D-14-00356.1, 2015.
Manney, G. L., Allen, D. R., Kruger, K., Naujokat, B., San-Tee, M. L.,
Sabots, J. L., Pawson, S., Swinbank, R., Randall, C. E., Simmons, A. J., and
Long, C.: Diagnostic comparison of meteorological analyses during the 2002
Antarctic winter, Mon. Weather Rev., 133, 1261–1278, https://doi.org/10.1175/MWR2926.1,
2005.
Marshall, G. J.: Trends in the Southern Annular Mode from Observations and
Reanalyses, J. Climate, 16, 4134–4143,
https://doi.org/10.1175/1520-0442(2003)016<4134:TITSAM>2.0.CO;2, 2003.
Marshall, G. J., Orr, A., van Lipzig, N. P. M., and King, J. C.: The impact
of a changing Southern Hemisphere annular mode on Antarctic Peninsula summer
temperatures, J. Climate, 19, 5388–5404, https://doi.org/10.1175/JCLI3844.1, 2006.
Marshall, G. J., Orr, A., and Turner, J.: A predominant reversal in the
relationship between the SAM and East Antarctic temperatures during the 21st
Century, J. Climate, 26, 5196–5204, https://doi.org/10.1175/JCLI-D-12-00671.1, 2013.
Martineau, P.: S-RIP: Zonal-mean dynamical variables of global atmospheric
reanalyses on pressure levels, Centre for Environmental Data Analysis [dataset], https://doi.org/10.5285/b241a7f536a244749662360bd7839312, 2017.
Martineau, P., Son, S.-W., and Taguchi, M.: Dynamical consistency of
reanalysis datasets in the extratropical stratosphere, J. Climate, 29,
3057–3074, https://doi.org/10.1175/JCLI-D-15-0469.1, 2016.
Martineau, P., Chen, G., Son, S.-W., and Kim, J.: Lower-Stratospheric
Control of the Frequency of Sudden Stratospheric Warming Events, J. Geophys.
Res.-Atmos., 123, 3051–3070, https://doi.org/10.1002/2017JD027648, 2018a.
Martineau, P., Son, S.-W., Taguchi, M., and Butler, A. H.: A comparison of the momentum budget in reanalysis datasets during sudden stratospheric warming events, Atmos. Chem. Phys., 18, 7169–7187, https://doi.org/10.5194/acp-18-7169-2018, 2018b.
Martineau, P., Wright, J. S., Zhu, N., and Fujiwara, M.: Zonal-mean data set of global atmospheric reanalyses on pressure levels, Earth Syst. Sci. Data, 10, 1925–1941, https://doi.org/10.5194/essd-10-1925-2018, 2018c.
Matsuno, T.: Vertical propagation of stationary planetary waves in the
winter Northern Hemisphere, J. Atmos. Sci., 27, 871–883,
https://doi.org/10.1175/1520-0469(1970)027<0871:VPOSPW>2.0.CO;2, 1970.
McLandress, C., Jonsson, A. I., Plummer, D. A., Reader, M. C., Scinocca, J.
F., and Shepherd, T. G.: Separating the Dynamical Effects of Climate Change and Ozone Depletion, Part I: Southern Hemisphere stratosphere, J. Climate, 23, 5002–5020, https://doi.org/10.1175/2010JCLI3586.1, 2010.
McLandress, C., Shepherd, T. G., Scinocca, J. F., Plummer, D. A., Sigmond,
M., Jonsson, A. I., and Reader, M. C.: Separating the Dynamical Effects of
Climate Change and Ozone Depletion, Part II: Southern Hemisphere
Troposphere, J. Climate, 24, 1850–1868, https://doi.org/10.1175/2010JCLI3958.1, 2011.
Orr, A., Cresswell, D., Marshall, G. J., Hunt, J. C. R., Sommeria, J., Wang,
C. G., and Light, M.: A “low-level” explanation for the recent large warming trend over the western Antarctic Peninsula involving blocked winds and changes in zonal circulation, Geophys. Res. Lett., 31, L06204,
https://doi.org/10.1029/2003GL019160, 2004.
Orr, A., Marshall, G., Hunt, J. C. R., Sommeria, J., Wang, C., van Lipzig, N., Cresswell, D., and King, J. C.: Characteristics of airflow over
the Antarctic Peninsula and its response to recent strengthening of westerly
circumpolar winds, J. Atmos. Sci., 65, 1396–1413, https://doi.org/10.1175/2007JAS2498.1,
2008.
Orr, A., Bechtold, P., Scinocca, J., Ern, M., and Janiskova, M.: Improved
middle atmosphere climate and forecasts in the ECMWF model through a
non-orographic gravity wave drag parametrization, J. Climate, 23, 5905–5926,
https://doi.org/10.1175/2010JCLI3490.1, 2010.
Orr, A., Bracegirdle, T. J., Hoskings, J. S., Jung, T., Haigh, J.
D., Phillips, T., and Feng, W.: Possible dynamical mechanisms for Southern
Hemisphere climate change due to the ozone hole, J. Atmos. Sci., 69,
2917–2932, https://doi.org/10.1175/JAS-D-11-0210.1, 2012.
Orr, A., Bracegirdle, T. J., Hosking, J. S., Feng, W., Roscoe, H. K., and
Haigh, J. D.: Strong dynamical modulation of the cooling of the polar
stratosphere associated with the Antarctic ozone hole, J. Climate, 26,
662–668, https://doi.org/10.1175/JCLI-D-12-00480.1, 2013.
Palmer, T. N.: Aspects of stratospheric sudden warmings studied from a
transformed Eulerian-mean viewpoint, J. Geophys. Res.-Oceans, 86, 9679–9687,
https://doi.org/10.1029/JC086iC10p09679, 1981.
Plumb, R. A.: Planetary waves and the extratropical winter stratosphere, in: The Stratosphere: Dynamics, Transport and Chemistry, edited by: Polvani, L. M., Sobel, A. H., and Waugh, D. W., 23–41, AGU, Washington, D.C., USA, 2010.
Polvani, L. M., Waugh, D. W., Correa, G. J. P., and Son, S.-W.:
Stratospheric ozone depletion: The main driver of twentieth-century
atmospheric circulation changes in the Southern Hemisphere, J. Climate, 24,
795–812, https://doi.org/10.1175/2010JCLI3772.1, 2011.
Randel, W. J. and Wu, F.: Cooling of the Arctic and Antarctic polar
stratospheres due to ozone depletion, J. Climate, 12, 1467–1479,
https://doi.org/10.1175/1520-0442(1999)012<1467:COTAAA>2.0.CO;2, 1999.
Robinson, W. A.: Does eddy feedback sustain variability in the zonal index?, J. Atmos. Sci., 53, 3556–3569, https://doi.org/10.1175/1520-0469(1996)053<3556:DEFSVI>2.0.CO;2, 1996.
Robinson, W. A.: A baroclinic mechanism for the eddy feedback on the zonal
index, J. Atmos. Sci., 57, 415–422, https://doi.org/10.1175/1520-0469(2000)057<0415:ABMFTE>2.0.CO;2, 2000.
Saha, S., Moorthi, S., Pan, H.-L., Wu, X., Wang, J., Nadiga, S., Tripp, P.,
Kistler, R., Woollen, J., Behringer, D., Liu, H., Stokes, D., Grumbine, R.,
Gayno, G., Wang, J., Hou, Y.-T., Chuang, H.-Y., Juang, H.-M. H., Sela, J.,
Iredell, M., Treadon, R., Kleist, D., Van Delst, P., Keyser, D., Derber, J.,
Ek, M., Meng, J., Wei, H., Yang, R., Lord, S., van den Dool, H., Kumar, A.,
Wang, W., Long, C., Chelliah, M., Xue, Y., Huang, B., Schemm, J.-K.,
Ebisuzaki, W., Lin, R., Xie, P., Chen, M., Zhou, S., Higgins, W., Zou,
C.-Z., Liu, Q., Chen, Y., Han, Y., Cucurull, L., Reynolds, R. W., Rutledge,
G., and Goldberg, M.: The NCEP Climate Forecast System Reanalysis, B. Am. Meteorol. Soc., 91, 1015–1057, https://doi.org/10.1175/2010BAMS3001.1, 2010.
Saha, S., Moorthi, S., Xingren, W., Jiande, W., Nadiga, S., Tripp, P.,
Behringer, D., Hou, Y.-T., Chuang, H.-Y., Iredell, M., Ek, M., Meng, J.,
Yang, R., Mendez, M. P., van den Dool, H., Zhang, Q., Wang, W., Chen, M.,
and Becker, E.: The NCEP climate forecast system version 2, J. Climate, 27,
2185–2208, https://doi.org/10.1175/JCLI-D-12-00823.1, 2014.
Scott, R. K. and Polvani, L. M.: Internal Variability of the Winter
Stratosphere, Part I: Time-Independent Forcing, J. Atmos. Sci., 63,
2758–2776, https://doi.org/10.1175/JAS3797.1, 2006.
Shaw, T. A., Perlwitz, J., Harnik, N., Newman, P. A., and Pawson, S.: The
impact of stratospheric ozone changes on downward wave coupling in the
Southern Hemisphere, J. Climate, 24, 4210–4229, https://doi.org/10.1175/2011JCLI4170.1,
2011.
Simmons, A., Soci, C., Nicholas, J., Bell, B., Berrisford, P., Dragani, R.,
Flemming, J., Haimberger, L., Healy, S., Hersbach, H., Horanyi, A., Inness,
A., Munoz-Sabater, J., Radu, R., and Schepers, D.: Global stratospheric
temperature bias and other stratospheric aspects of ERA5 and ERA5.1, ECMWF
Technical Memoranda, No. 859, ECMWF, https://doi.org/10.21957/rcxqfmg0, 2020.
Smith, K. L. and Scott, R. K.: The role of planetary waves in the
tropospheric jet response to stratospheric cooling, Geophys. Res. Lett., 43, 2904–2911,
https://doi.org/10.1002/2016GL067849, 2016.
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, https://doi.org/10.1126/science.aae0061, 2016.
Song, Y. and Robinson, W. A.: Dynamical mechanisms for stratospheric
influences on the troposphere, J. Atmos. Sci., 61, 1711–1725,
https://doi.org/10.1175/1520-0469(2004)061<1711:DMFSIO>2.0.CO;2, 2004.
Sterl, A.: On the (In)Homogeneity of Reanalysis Products, J. Climate, 17,
3866–3873, https://doi.org/10.1175/1520-0442(2004)017<3866:OTIORP>2.0.CO;2, 2004.
Thompson, D. W. J. and Solomon, S.: Interpretation of recent Southern
Hemisphere climate change, Science, 296, 895–899,
https://doi.org/10.1126/science.1069270, 2002.
Thompson, D. W. J., Solomon, S., Kushner, P. J., England, M. H., Grise, K.
M., and Karoly, D. J.: Signatures of the Antarctic ozone hole in Southern
Hemisphere surface climate change, Nat. Geosci., 4, 741–749,
https://doi.org/10.1038/ngeo1296, 2011.
Vallis, G. K.: Atmospheric and oceanic fluid dynamics, Cambridge University Press, Cambridge, UK, 2017.
van Lipzig, N. P. M., Marshall, G. J., Orr, A., and King, J. C.: The
relationship between the southern hemisphere annular mode and Antarctic
Peninsula summer temperatures: Analysis of a high-resolution model, J. Climate, 21, 1649–1668, https://doi.org/10.1175/2007JCLI1695.1, 2008.
Short summary
Reanalysis datasets combine observations and weather forecast simulations to create our best estimate of the state of the atmosphere and are important for climate monitoring. Differences in the technical details of these products mean that they may give different results. This study therefore examined how changes associated with the so-called Antarctic ozone hole are represented, which is one of the most important climate changes in recent decades, and showed that they were broadly consistent.
Reanalysis datasets combine observations and weather forecast simulations to create our best...
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