Articles | Volume 22, issue 11
https://doi.org/10.5194/acp-22-7631-2022
© Author(s) 2022. 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-22-7631-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
14 Jun 2022
Research article |
| 14 Jun 2022
Potential environmental impact of bromoform from Asparagopsis farming in Australia
Institute of Space and Atmospheric Studies, University of
Saskatchewan, Saskatoon, Canada
now at: Cooperative Institute for Research in Environmental Sciences
(CIRES), University of Colorado Boulder, Boulder, CO, USA
Birgit Quack
CORRESPONDING AUTHOR
Marine Biogeochemistry Research Division, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Robert D. Kinley
Commonwealth Scientific and Industrial Research Organisation
(CSIRO), Agriculture and Food, Townsville, QLD, Australia
Ignacio Pisso
Norwegian Institute for Air Research (NILU), Kjeller, Norway
Susann Tegtmeier
Institute of Space and Atmospheric Studies, University of
Saskatchewan, Saskatoon, Canada
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Atmos. Chem. Phys., 25, 3821–3839, https://doi.org/10.5194/acp-25-3821-2025, https://doi.org/10.5194/acp-25-3821-2025, 2025
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The climate impact of volcanic eruptions depends in part on how long aerosols spend in the stratosphere. We develop a conceptual model for stratospheric aerosol lifetime in terms of production and decay timescales, as well as a lag between injection and decay. We find residence time depends strongly on injection height in the lower stratosphere. We show that the lifetime of stratospheric aerosol from the 1991 Pinatubo eruption is around 22 months, significantly longer than is commonly reported.
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Atmos. Chem. Phys., 25, 3347–3361, https://doi.org/10.5194/acp-25-3347-2025, https://doi.org/10.5194/acp-25-3347-2025, 2025
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The height of the convective boundary layer (CBLH) is related to our health due to its crucial role in pollutant dispersion. The variance of vertical velocity from millimeter wave cloud radar (MMCR) can accurately capture the diurnal evolution of the CBLH, due to a small blind range and less impact by the residual layer. The CBLH is affected by radiation, humidity, cloud, and precipitation; thus, the MMCR is suitable for monitoring the CBLH, owing to its observation capability in various weather conditions.
Susann Tegtmeier, Christa Marandino, Yue Jia, Birgit Quack, and Anoop S. Mahajan
Atmos. Chem. Phys., 22, 6625–6676, https://doi.org/10.5194/acp-22-6625-2022, https://doi.org/10.5194/acp-22-6625-2022, 2022
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Sean M. Davis, William T. Ball, Yue Jia, Gabriel Chiodo, Justin A. Alsing, James Keeble, Hideharu Akiyoshi, Carlo Arosio, Ewa M. Bednarz, Andreas Chrysanthou, Melanie Coldewey-Egbers, Robert Damadeo, Sandip Dhomse, Mohamadou A. Diallo, Simone Dietmuller, Roland Eichinger, Stacey Frith, Birgit Hassler, Michaela I. Hegglin, Daan Hubert, Patrick Jöckel, Béatrice Josse, Natalya Kramarova, Diego Loyola, Eliane Maillard Barras, Marion Marchand, Olaf Morgenstern, David Plummer, Robert W. Portmann, Karen H. Rosenlof, Alexei Rozanov, Viktoria F. Sofieva, Johannes Staehelin, Timofei Sukhodolov, Kleareti Tourpali, Ronald J. Van der A, H. J. Ray Wang, Krzysztof Wargan, Shingo Watanabe, Mark Weber, Jeannette D. Wild, Yousuke Yamashita, and Jerry Ziemke
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Florian Voet, Felix Ploeger, Johannes C. Laube, Laura N. Saunders, Patrick E. Sheese, Attahir Mainika, Peter Preusse, Jens-Uwe Grooß, Kaley A. Walker, Susann Tegtmeier, and Michaela Imelda Hegglin
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This preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).
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Kimberlee Dubé, Adam Bourassa, Susann Tegtmeier, Daniel Zawada, and Douglas Degenstein
Atmos. Chem. Phys., 26, 2161–2173, https://doi.org/10.5194/acp-26-2161-2026, https://doi.org/10.5194/acp-26-2161-2026, 2026
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The stratopause, the boundary between the stratosphere and the mesosphere, is projected to cool and move lower in response to anthropogenic greenhouse gas emissions. We use observations from two satellite instruments to assess the annual and inter-annual variability and to quantify trends in the stratopause temperature and height. We find that the stratopause cooled by ~0.5–1 K per decade and that the tropical stratopause moved lower by 300–475 m per decade during 2005–2021.
Nigel A. D. Richards, Natalya A. Kramarova, Stacey M. Frith, Sean M. Davis, and Yue Jia
Atmos. Meas. Tech., 19, 529–547, https://doi.org/10.5194/amt-19-529-2026, https://doi.org/10.5194/amt-19-529-2026, 2026
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Rona L. Thompson, Nalini Krishnankutty, Ignacio Pisso, Philipp Schneider, Kerstin Stebel, Motoki Sasakawa, Andreas Stohl, and Stephen M. Platt
Atmos. Chem. Phys., 25, 12737–12751, https://doi.org/10.5194/acp-25-12737-2025, https://doi.org/10.5194/acp-25-12737-2025, 2025
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Satellite remote sensing of atmospheric mixing ratios of greenhouse gases (GHGs) can provide information on their emissions. This study presents a novel method to use atmospheric mixing ratios observed by satellites with a Lagrangian model of atmospheric transport to estimate GHG emissions. This method can reduce model errors resulting from how an observation is represented by an atmospheric model, thereby helping to reduce the errors in the GHG emissions derived.
Mona Zolghadrshojaee, Susann Tegtmeier, Sean M. Davis, Robin Pilch Kedzierski, and Leopold Haimberger
Atmos. Chem. Phys., 25, 12213–12232, https://doi.org/10.5194/acp-25-12213-2025, https://doi.org/10.5194/acp-25-12213-2025, 2025
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Shenglong Zhang, Jiao Chen, Jonathon S. Wright, Sean M. Davis, Jie Gao, Paul Konopka, Ninghui Li, Mengqian Lu, Susann Tegtmeier, Xiaolu Yan, Guang J. Zhang, and Nuanliang Zhu
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Swirling above summer storms, the Asian monsoon anticyclone functions as both gateway and gatekeeper to moisture entering the stratosphere. Although well monitored from space since 2005, many details of the anticyclone and the air that flows through it remain mysterious. Reanalyses, which combine model output and observations, may help to address how and why but only if they reliably capture the what and where of water vapor variations. Current reanalyses are beginning to meet these criteria.
Miming Zhang, Haipeng Gao, Shanshan Wang, Yue Jia, Shibo Yan, Rong Tian, Jinpei Yan, and Yanfang Wu
EGUsphere, https://doi.org/10.5194/egusphere-2025-1622, https://doi.org/10.5194/egusphere-2025-1622, 2025
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Under cold and clean conditions in the free troposphere, oceanic dimethyl sulfide (DMS) can form new particles. Using data from the field observation and Lana climatology with the FLEXPART model, we evaluated DMS contribution from surface ocean to the free troposphere. We found that cyclone enhances the contribution of oceanic dimethyl sulfide to the free troposphere over the Southern Ocean, suggesting significant DMS-derived new particles likely occurred at high altitudes in the Southern Ocean.
Matthew Toohey, Yue Jia, Sujan Khanal, and Susann Tegtmeier
Atmos. Chem. Phys., 25, 3821–3839, https://doi.org/10.5194/acp-25-3821-2025, https://doi.org/10.5194/acp-25-3821-2025, 2025
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The climate impact of volcanic eruptions depends in part on how long aerosols spend in the stratosphere. We develop a conceptual model for stratospheric aerosol lifetime in terms of production and decay timescales, as well as a lag between injection and decay. We find residence time depends strongly on injection height in the lower stratosphere. We show that the lifetime of stratospheric aerosol from the 1991 Pinatubo eruption is around 22 months, significantly longer than is commonly reported.
Zirui Zhang, Kaiming Huang, Fan Yi, Wei Cheng, Fuchao Liu, Jian Zhang, and Yue Jia
Atmos. Chem. Phys., 25, 3347–3361, https://doi.org/10.5194/acp-25-3347-2025, https://doi.org/10.5194/acp-25-3347-2025, 2025
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The height of the convective boundary layer (CBLH) is related to our health due to its crucial role in pollutant dispersion. The variance of vertical velocity from millimeter wave cloud radar (MMCR) can accurately capture the diurnal evolution of the CBLH, due to a small blind range and less impact by the residual layer. The CBLH is affected by radiation, humidity, cloud, and precipitation; thus, the MMCR is suitable for monitoring the CBLH, owing to its observation capability in various weather conditions.
Kimberlee Dubé, Susann Tegtmeier, Felix Ploeger, and Kaley A. Walker
Atmos. Chem. Phys., 25, 1433–1447, https://doi.org/10.5194/acp-25-1433-2025, https://doi.org/10.5194/acp-25-1433-2025, 2025
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The transport rate of air in the stratosphere has changed in response to human emissions of greenhouse gases and ozone-depleting substances. This transport rate can be approximated using measurements of long-lived trace gases. We use observations and model results to derive anomalies and trends in the mean rate of stratospheric air transport. We find that air in the Northern Hemisphere aged by up to 0.3 years per decade relative to air in the Southern Hemisphere over 2004–2017.
Kimberlee Dubé, Susann Tegtmeier, Adam Bourassa, Daniel Zawada, Douglas Degenstein, William Randel, Sean Davis, Michael Schwartz, Nathaniel Livesey, and Anne Smith
Atmos. Chem. Phys., 24, 12925–12941, https://doi.org/10.5194/acp-24-12925-2024, https://doi.org/10.5194/acp-24-12925-2024, 2024
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Greenhouse gas emissions that warm the troposphere also result in stratospheric cooling. The cooling rate is difficult to quantify above 35 km due to a deficit of long-term observational data with high vertical resolution in this region. We use satellite observations from several instruments, including a new temperature product from OSIRIS, to show that the upper stratosphere, from 35–60 km, cooled by 0.5 to 1 K per decade over 2005–2021 and by 0.6 K per decade over 1979–2021.
Lucie Bakels, Daria Tatsii, Anne Tipka, Rona Thompson, Marina Dütsch, Michael Blaschek, Petra Seibert, Katharina Baier, Silvia Bucci, Massimo Cassiani, Sabine Eckhardt, Christine Groot Zwaaftink, Stephan Henne, Pirmin Kaufmann, Vincent Lechner, Christian Maurer, Marie D. Mulder, Ignacio Pisso, Andreas Plach, Rakesh Subramanian, Martin Vojta, and Andreas Stohl
Geosci. Model Dev., 17, 7595–7627, https://doi.org/10.5194/gmd-17-7595-2024, https://doi.org/10.5194/gmd-17-7595-2024, 2024
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Computer models are essential for improving our understanding of how gases and particles move in the atmosphere. We present an update of the atmospheric transport model FLEXPART. FLEXPART 11 is more accurate due to a reduced number of interpolations and a new scheme for wet deposition. It can simulate non-spherical aerosols and includes linear chemical reactions. It is parallelised using OpenMP and includes new user options. A new user manual details how to use FLEXPART 11.
Mona Zolghadrshojaee, Susann Tegtmeier, Sean M. Davis, and Robin Pilch Kedzierski
Atmos. Chem. Phys., 24, 7405–7419, https://doi.org/10.5194/acp-24-7405-2024, https://doi.org/10.5194/acp-24-7405-2024, 2024
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Satellite data challenge the idea of an overall cooling trend in the tropical tropopause layer. From 2002 to 2022, a warming trend was observed, diverging from earlier findings. Tropopause height changes indicate dynamic processes alongside radiative effects. Upper-tropospheric warming contrasts with lower-stratosphere temperatures. The study highlights the complex interplay of factors shaping temperature trends.
Dennis Booge, Jerry F. Tjiputra, Dirk J. L. Olivié, Birgit Quack, and Kirstin Krüger
Earth Syst. Dynam., 15, 801–816, https://doi.org/10.5194/esd-15-801-2024, https://doi.org/10.5194/esd-15-801-2024, 2024
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Oceanic bromoform, produced by algae, is an important precursor of atmospheric bromine, highlighting the importance of implementing these emissions in climate models. The simulated mean oceanic concentrations align well with observations, while the mean atmospheric values are lower than the observed ones. Modelled annual mean emissions mostly occur from the sea to the air and are driven by oceanic concentrations, sea surface temperature, and wind speed, which depend on season and location.
Bjorn Stevens, Stefan Adami, Tariq Ali, Hartwig Anzt, Zafer Aslan, Sabine Attinger, Jaana Bäck, Johanna Baehr, Peter Bauer, Natacha Bernier, Bob Bishop, Hendryk Bockelmann, Sandrine Bony, Guy Brasseur, David N. Bresch, Sean Breyer, Gilbert Brunet, Pier Luigi Buttigieg, Junji Cao, Christelle Castet, Yafang Cheng, Ayantika Dey Choudhury, Deborah Coen, Susanne Crewell, Atish Dabholkar, Qing Dai, Francisco Doblas-Reyes, Dale Durran, Ayoub El Gaidi, Charlie Ewen, Eleftheria Exarchou, Veronika Eyring, Florencia Falkinhoff, David Farrell, Piers M. Forster, Ariane Frassoni, Claudia Frauen, Oliver Fuhrer, Shahzad Gani, Edwin Gerber, Debra Goldfarb, Jens Grieger, Nicolas Gruber, Wilco Hazeleger, Rolf Herken, Chris Hewitt, Torsten Hoefler, Huang-Hsiung Hsu, Daniela Jacob, Alexandra Jahn, Christian Jakob, Thomas Jung, Christopher Kadow, In-Sik Kang, Sarah Kang, Karthik Kashinath, Katharina Kleinen-von Königslöw, Daniel Klocke, Uta Kloenne, Milan Klöwer, Chihiro Kodama, Stefan Kollet, Tobias Kölling, Jenni Kontkanen, Steve Kopp, Michal Koran, Markku Kulmala, Hanna Lappalainen, Fakhria Latifi, Bryan Lawrence, June Yi Lee, Quentin Lejeun, Christian Lessig, Chao Li, Thomas Lippert, Jürg Luterbacher, Pekka Manninen, Jochem Marotzke, Satoshi Matsouoka, Charlotte Merchant, Peter Messmer, Gero Michel, Kristel Michielsen, Tomoki Miyakawa, Jens Müller, Ramsha Munir, Sandeep Narayanasetti, Ousmane Ndiaye, Carlos Nobre, Achim Oberg, Riko Oki, Tuba Özkan-Haller, Tim Palmer, Stan Posey, Andreas Prein, Odessa Primus, Mike Pritchard, Julie Pullen, Dian Putrasahan, Johannes Quaas, Krishnan Raghavan, Venkatachalam Ramaswamy, Markus Rapp, Florian Rauser, Markus Reichstein, Aromar Revi, Sonakshi Saluja, Masaki Satoh, Vera Schemann, Sebastian Schemm, Christina Schnadt Poberaj, Thomas Schulthess, Cath Senior, Jagadish Shukla, Manmeet Singh, Julia Slingo, Adam Sobel, Silvina Solman, Jenna Spitzer, Philip Stier, Thomas Stocker, Sarah Strock, Hang Su, Petteri Taalas, John Taylor, Susann Tegtmeier, Georg Teutsch, Adrian Tompkins, Uwe Ulbrich, Pier-Luigi Vidale, Chien-Ming Wu, Hao Xu, Najibullah Zaki, Laure Zanna, Tianjun Zhou, and Florian Ziemen
Earth Syst. Sci. Data, 16, 2113–2122, https://doi.org/10.5194/essd-16-2113-2024, https://doi.org/10.5194/essd-16-2113-2024, 2024
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To manage Earth in the Anthropocene, new tools, new institutions, and new forms of international cooperation will be required. Earth Virtualization Engines is proposed as an international federation of centers of excellence to empower all people to respond to the immense and urgent challenges posed by climate change.
Daniel Zawada, Kimberlee Dubé, Taran Warnock, Adam Bourassa, Susann Tegtmeier, and Douglas Degenstein
Atmos. Meas. Tech., 17, 1995–2010, https://doi.org/10.5194/amt-17-1995-2024, https://doi.org/10.5194/amt-17-1995-2024, 2024
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There remain large uncertainties in long-term changes of stratospheric–atmospheric temperatures. We have produced a time series of more than 20 years of satellite-based temperature measurements from the OSIRIS instrument in the upper–middle stratosphere. The dataset is publicly available and intended to be used for a better understanding of changes in stratospheric temperatures.
Magdalena Pühl, Anke Roiger, Alina Fiehn, Alan M. Gorchov Negron, Eric A. Kort, Stefan Schwietzke, Ignacio Pisso, Amy Foulds, James Lee, James L. France, Anna E. Jones, Dave Lowry, Rebecca E. Fisher, Langwen Huang, Jacob Shaw, Prudence Bateson, Stephen Andrews, Stuart Young, Pamela Dominutti, Tom Lachlan-Cope, Alexandra Weiss, and Grant Allen
Atmos. Chem. Phys., 24, 1005–1024, https://doi.org/10.5194/acp-24-1005-2024, https://doi.org/10.5194/acp-24-1005-2024, 2024
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In April–May 2019 we carried out an airborne field campaign in the southern North Sea with the aim of studying methane emissions of offshore gas installations. We determined methane emissions from elevated methane measured downstream of the sampled installations. We compare our measured methane emissions with estimated methane emissions from national and global annual inventories. As a result, we find inconsistencies of inventories and large discrepancies between measurements and inventories.
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.
Rona L. Thompson and Ignacio Pisso
Atmos. Meas. Tech., 16, 235–246, https://doi.org/10.5194/amt-16-235-2023, https://doi.org/10.5194/amt-16-235-2023, 2023
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Atmospheric networks are used for monitoring air quality and greenhouse gases and can provide essential information about the sources and sinks. The design of the network, specifically where to place the observations, is a critical question in order to maximize the information provided while minimizing the cost. Here, a novel method of designing atmospheric networks is presented with two examples, one on monitoring sources of methane and the second on monitoring fossil fuel emissions of CO2.
Kristof Bognar, Susann Tegtmeier, Adam Bourassa, Chris Roth, Taran Warnock, Daniel Zawada, and Doug Degenstein
Atmos. Chem. Phys., 22, 9553–9569, https://doi.org/10.5194/acp-22-9553-2022, https://doi.org/10.5194/acp-22-9553-2022, 2022
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We quantify recent changes in stratospheric ozone (outside the polar regions) using a combination of three satellite datasets. We find that upper stratospheric ozone have increased significantly since 2000, although the recovery shows an unexpected pause in the Northern Hemisphere. Combined with the likely decrease in ozone in the lower stratosphere, this presents an interesting challenge for predicting the future of the ozone layer.
Susann Tegtmeier, Christa Marandino, Yue Jia, Birgit Quack, and Anoop S. Mahajan
Atmos. Chem. Phys., 22, 6625–6676, https://doi.org/10.5194/acp-22-6625-2022, https://doi.org/10.5194/acp-22-6625-2022, 2022
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In the atmosphere over the Indian Ocean, intense anthropogenic pollution from Southeast Asia mixes with pristine oceanic air. During the winter monsoon, high pollution levels are regularly observed over the entire northern Indian Ocean, while during the summer monsoon, clean air dominates. Here, we review current progress in detecting and understanding atmospheric gas-phase composition over the Indian Ocean and its impacts on the upper atmosphere, oceanic biogeochemistry, and marine ecosystems.
Amy Foulds, Grant Allen, Jacob T. Shaw, Prudence Bateson, Patrick A. Barker, Langwen Huang, Joseph R. Pitt, James D. Lee, Shona E. Wilde, Pamela Dominutti, Ruth M. Purvis, David Lowry, James L. France, Rebecca E. Fisher, Alina Fiehn, Magdalena Pühl, Stéphane J. B. Bauguitte, Stephen A. Conley, Mackenzie L. Smith, Tom Lachlan-Cope, Ignacio Pisso, and Stefan Schwietzke
Atmos. Chem. Phys., 22, 4303–4322, https://doi.org/10.5194/acp-22-4303-2022, https://doi.org/10.5194/acp-22-4303-2022, 2022
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We measured CH4 emissions from 21 offshore oil and gas facilities in the Norwegian Sea in 2019. Measurements compared well with operator-reported emissions but were greatly underestimated when compared with a 2016 global fossil fuel inventory. This study demonstrates the need for up-to-date and accurate inventories for use in research and policy and the important benefits of best-practice reporting methods by operators. Airborne measurements are an effective tool to validate such inventories.
Cited articles
Abbott, D. W., Aasen, I. M., Beauchemin, K. A., Grondahl, F., Gruninger, R.,
Hayes, M., Huws, S., Kenny, D. A., Krizsan, S. J., Kirwan, S. F., Lind, V.,
Meyer, U., Ramin, M., Theodoridou, K., von Soosten, D., Walsh, P. J.,
Waters, S., and Xing, X.: Seaweed and Seaweed Bioactives for Mitigation of
Enteric Methane: Challenges and Opportunities, Animals, 10, 2432,
https://doi.org/10.3390/ani10122432, 2020.
Aschmann, J., Sinnhuber, B.-M., Atlas, E. L., and Schauffler, S. M.: Modeling the transport of very short-lived substances into the tropical upper troposphere and lower stratosphere, Atmos. Chem. Phys., 9, 9237–9247, https://doi.org/10.5194/acp-9-9237-2009, 2009.
Battaglia, M.: CSIRO and FutureFeed Pty Ltd., Personal Communication,
https://www.csiro.au/ and https://www.future-feed.com/, last access: 15 June 2020.
Beauchemin, K. A., Ungerfeld, E. M., Eckard, R. J., and Wang, M.: Review:
Fifty years of research on rumen methanogenesis: lessons learned and future
challenges for mitigation, Animals, 14, 2–16,
https://doi.org/10.1017/S1751731119003100, 2020.
Black, J. L., Davison, T. M., and Box, I.: Methane Emissions from Ruminants in
Australia: Mitigation Potential and Applicability of Mitigation
Strategies, Animals, 11, 951,
https://doi.org/10.3390/ani11040951, 2021.
Brioude, J., Portmann, R. W., Daniel, J. S., Cooper, O. R., Frost, G. J.,
Rosenlof, K. H., Granier, C., Ravishankara, A. R., Montzka, S. A., and
Stohl, A.: Variations in ozone depletion potentials of very short-lived
substances with season and emission region, Geophys. Res. Lett.,
37, L19804, https://doi.org/10.1029/2010GL044856, 2010.
Burreson, B. J., Moore, R. E., and Roller, P. P.: Volatile halogen compounds
in the alga Asparagopsis taxiformis (Rhodophyta), J. Agr. Food Chem., 24, 856–861, https://doi.org/10.1021/jf60206a040, 1976.
Carpenter, L. J. and Liss, P. S.: On temperate sources of bromoform and
other reactive organic bromine gases, J. Geophys. Res.-Atmos., 105, 20539–20547, https://doi.org/10.1029/2000JD900242, 2000.
Carpenter, L. J., Reimann, S. (Lead Authors), Burkholder, J. B., Clerbaux,
C., Hall, B. D., and Hossaini, R.: Ozone-depleting substances (ODSs) and
other gases of interest to the Montreal Protocol, in: Scientific assessment
of ozone depletion: 2014, Global Ozone Research and Monitoring
Project-Report A., edited by: Engel, A. and Montzka, S. A., World Meteorological
Organization, Geneva, Switzerland, 2014.
Claxton, T., Hossaini, R., Wild, O., Chipperfield, M. P., and Wilson, C.: On the
regional and seasonal ozone depletion potential of chlorinated very
shortlived substances, Geophys. Res. Lett., 46, 5489–5498.
https://doi.org/10.1029/2018GL081455, 2019.
Dee, D. P., Uppala, S. M., Simmons, A. J., Berrisford, P., Poli, P.,
Kobayashi, S., Andrae, U., Balmaseda, M. A., Balsamo, G., Bauer, P.,
Bechtold, P., Beljaars, A. C. M., van de Berg, L., Bidlot, J., Bormann, N.,
Delsol, C., Dragani, R., Fuentes, M., Geer, A. J., Haimberger, L., Healy, S.
B., Hersbach, H., Holm, E. V., Isaksen, L., Kallberg, P., Kohler, M.,
Matricardi, M., McNally, A. P., Monge-Sanz, B. M., Morcrette, J. J., Park,
B. K., Peubey, C., de Rosnay, P., Tavolato, C., Thepaut, J. N., and Vitart,
F.: The ERA-Interim reanalysis: configuration and performance of the data
assimilation system, Q. J. Roy. Meteor. Soc., 137, 553–597,
https://doi.org/10.1002/qj.828, 2011.
Dunse, B. L., Derek, N., Fraser, P. J., Krummel, P. B., and Steele, L. P.:
Australian and Global Emissions of Ozone Depleting Substances, Report
prepared for the Australian Government Department of Agriculture, Water and
the Environment, CSIRO Oceans and Atmosphere, Climate Science Centre,
Melbourne, Australia, 58 pp., 2020.
Elsom, S.: Sea Forest Asparagopsis production, Personal Communication,
https://www.seaforest.com.au/, last access: 15 June 2020.
Engel, A., and Rigby, M. (Lead Authors), Burkholder, J. B., Fernandez, R.
P., Froidevaux, L., Hall, B. D., Hossaini, R., Saito, T., Vollmer, M. K.,
and Yao, B.: Update on Ozone-Depleting Substances (ODSs) and Other Gases of
Interest to the Montreal Protocol, Chapter 1 in Scientific Assessment of
Ozone Depletion: 2018, Global Ozone Research and Monitoring Project –
Report No. 58, World Meteorological Organization, Geneva, Switzerland, 2018.
Fernandez, R. P., Barrera, J. A., López-Noreña, A. I., Kinnison, D.
E., Nicely, J., Salawitch, R. J., Wales, P. A., Toselli, B. M., Tilmes, S.,
Lamarque, J.-F., Cuevas, C. A., and Saiz-Lopez, A.: Intercomparison between
surrogate, explicit and full treatments of VSL bromine chemistry within the
CAM-Chem chemistry-climate model, Geophys. Res. Lett., 48,
e2020GL091125, https://doi.org/10.1029/2020GL091125, 2021.
Forster, C., Stohl, A., and Seibert, P.: Parameterization of Convective
Transport in a Lagrangian Particle Dispersion Model and Its Evaluation,
J. Appl. Meteorol. Clim., 46, 403–422,
https://doi.org/10.1175/jam2470.1, 2007.
Gerber, P. J., Steinfeld, H., Henderson, B., Mottet, A., Opio, C., Dijkman,
J., Falcucci, A., and Tempio, G.: Tackling climate change through livestock
– A global assessment of emissions and mitigation opportunities, Food and
Agriculture Organization of the United Nations (FAO), Rome, 2013.
Hense, I. and Quack, B.: Modelling the vertical distribution of bromoform in the upper water column of the tropical Atlantic Ocean, Biogeosciences, 6, 535–544, https://doi.org/10.5194/bg-6-535-2009, 2009.
Herrero, M. and Thornton, P. K.: Livestock and global change: Emerging
issues for sustainable food systems, P. Natl. Acad. Sci. USA, 110, 20878–20881, https://doi.org/10.1073/pnas.1321844111, 2013.
Hossaini, R., Chipperfield, M. P., Monge-Sanz, B. M., Richards, N. A. D., Atlas, E., and Blake, D. R.: Bromoform and dibromomethane in the tropics: a 3-D model study of chemistry and transport, Atmos. Chem. Phys., 10, 719–735, https://doi.org/10.5194/acp-10-719-2010, 2010.
Hung, L. D., Hori, K., Nang, H. Q., Kha, T., and Hoa, L. T.: Seasonal
changes in growth rate, carrageenan yield and lectin content in the red alga
Kappaphycus alvarezii cultivated in Camranh Bay, Vietnam, J. Appl. Phycol., 21, 265–272, https://doi.org/10.1007/s10811-008-9360-2, 2009.
IPCC: Climate Change 2022: The Physical Science Basis. Contribution of
Working Groups I to the Sixth Assessment Report of the Intergovernmental
Panel on Climate Change IPCC, Geneva, Switzerland, 2021.
Kamra, D. N.: Rumen microbial ecosystem, Curr Sci India, 89, 124–135,
http://www.jstor.org/stable/24110438 (last access: 4 March 2022), 2005.
Kinley, R. D. and Fredeen, A. H.: In Vitro Evaluation of Feeding North
Atlantic Stormtoss Seaweeds on Ruminal Digestion, J. Appl. Phycol., 27, 2387–2393, https://doi.org/10.1007/s10811-014-0487-z, 2015.
Kinley, R., Vucko, M., Machado, L., and Tomkins, N.: In Vitro Evaluation of
the Antimethanogenic Potency and Effects on Fermentation of Individual and
Combinations of Marine Macroalgae, Am. J. Plant Sci., 7,
2038–2054, https://doi.org/10.4236/ajps.2016.714184, 2016a.
Kinley, R. D., de Nys, R., Vucko, M. J., Machado, L., and Tomkins, N. W.:
The red macroalgae Asparagopsis taxiformis is a potent natural antimethanogenic that reduces
methane production during in vitro fermentation with rumen fluid, Anim. Prod., 56, 282–289, https://doi.org/10.1071/AN15576, 2016b.
Kinley, R. D., Martinez-Fernandez, G., Matthews, M. K., de Nys, R.,
Magnusson, M., and Tomkins, N. W.: Mitigating the carbon footprint and
improving productivity of ruminant livestock agriculture using a red
seaweed, J. Clean. Prod., 259, 120836,
https://doi.org/10.1016/j.jclepro.2020.120836, 2020.
Leedham, E. C., Hughes, C., Keng, F. S. L., Phang, S.-M., Malin, G., and Sturges, W. T.: Emission of atmospherically significant halocarbons by naturally occurring and farmed tropical macroalgae, Biogeosciences, 10, 3615–3633, https://doi.org/10.5194/bg-10-3615-2013, 2013.
Li, X. X., Norman, H. C., Kinley, R. D., Laurence, M., Wilmot, M., Bender,
H., de Nys, R., and Tomkins, N.: Asparagopsis taxiformis decreases enteric
methane production from sheep, Anim. Prod., 58, 681–688,
https://doi.org/10.1071/AN15883, 2018.
Liang, Q., Stolarski, R. S., Kawa, S. R., Nielsen, J. E., Douglass, A. R., Rodriguez, J. M., Blake, D. R., Atlas, E. L., and Ott, L. E.: Finding the missing stratospheric Bry: a global modeling study of CHBr3 and CH2Br2, Atmos. Chem. Phys., 10, 2269–2286, https://doi.org/10.5194/acp-10-2269-2010, 2010.
Maas, J., Tegtmeier, S., Quack, B., Biastoch, A., Durgadoo, J. V., Rühs, S., Gollasch, S., and David, M.: Simulating the spread of disinfection by-products and anthropogenic bromoform emissions from ballast water discharge in Southeast Asia, Ocean Sci., 15, 891–904, https://doi.org/10.5194/os-15-891-2019, 2019.
Maas, J., Tegtmeier, S., Jia, Y., Quack, B., Durgadoo, J. V., and Biastoch, A.: Simulations of anthropogenic bromoform indicate high emissions at the coast of East Asia, Atmos. Chem. Phys., 21, 4103–4121, https://doi.org/10.5194/acp-21-4103-2021, 2021.
Machado, L., Magnusson, M., Paul, N. A., de Nys, R., and Tomkins, N.:
Effects of Marine and Freshwater Macroalgae on In Vitro Total Gas and
Methane Production, PLOS ONE, 9, e85289, https://doi.org/10.1371/journal.pone.0085289, 2014.
Machado, L., Magnusson, M., Paul, N. A., Kinley, R., de Nys, R., and
Tomkins, N. W.: Identification of bioactives from the red seaweed
Asparagopsis taxiformis that promote antimethanogenic activity in vitro, J.
Appl. Phycol., 28, 3117–3126,
https://doi.org/10.1007/s10811-016-0830-7, 2016.
Magnusson, M., Vucko, M. J., Neoh, T. L., and de Nys, R.: Using oil
immersion to deliver a naturally-derived, stable bromoform product from the
red seaweed Asparagopsis taxiformis, Algal Res., 51, 102065,
https://doi.org/10.1016/j.algal.2020.102065, 2020.
Marshall, R. A., Harper, D. B., McRoberts, W. C., and Dring, M. J.: Volatile
bromocarbons produced by Falkenbergia stages of Asparagopsis spp.
(Rhodophyta), Limnol. Oceanogr., 44, 1348–1352, https://doi.org/10.4319/lo.1999.44.5.1348, 1999.
Mata, L., Gaspar, H., and Santos, R.: Carbon/nutrient balance in relation to
biomass production and halogenated compound content in the red alga
asparagopsis taxiformis (bonnemaisoniaceae)1, J. Phycol., 48,
248–253, https://doi.org/10.1111/j.1529-8817.2011.01083.x, 2012.
Mata, L., Lawton, R. J., Magnusson, M., Andreakis, N., de Nys, R., and Paul,
N. A.: Within-species and temperature-related variation in the growth and
natural products of the red alga Asparagopsis taxiformis, J. Appl. Phycol., 29, 1437–1447, https://doi.org/10.1007/s10811-016-1017-y, 2017.
Mayberry, D., Bartlett, H., Moss, J., Davison, T., and Herrero, M.: Pathways
to carbon-neutrality for the Australian red meat sector, Agr. Syst., 175, 13–21, https://doi.org/10.1016/j.agsy.2019.05.009, 2019.
Moate, P. J., Deighton, M. H., Williams, S. R. O., Pryce, J. E., Hayes, B.
J., Jacobs, J. L., Eckard, R. J., Hannah, M. C., and Wales, W. J.: Reducing
the carbon footprint of Australian milk production by mitigation of enteric
methane emissions, Anim. Prod., 56, 1017–1034,
https://doi.org/10.1071/AN15222, 2016.
Moore, R. M., Geen, C. E., and Tait, V. K.: Determination of Henry's Law
constants for a suite of naturally occurring halogenated methanes in
seawater, Chemosphere, 30, 1183–1191,
https://doi.org/10.1016/0045-6535(95)00009-W, 1995a.
Moore, R. M., Tokarczyk, R., Tait, V. K., Poulin, M., and Geen, C.: Marine
phytoplankton as a natural source of volatile organohalogens, in:
Naturally-Produced Organohalogens, edited by: Grimvall, A. and de Leer, E. W. B., Springer Netherlands, Dordrecht, https://doi.org/10.1007/978-94-011-0061-8_26, 1995b.
Morgavi, D. P., Forano, E., Martin, C., and Newbold, C. J.: Microbial
ecosystem and methanogenesis in ruminants, Animal, 4, 1024–1036,
https://doi.org/10.1017/s1751731110000546, 2010.
Montzka, S., Reimannander, S., Engel, A., Kruger, K., Simon, O., Sturges, W., Blake, D., Dorf, M. , Fraser, P., Froidevaux, L., Jucks, K., Kreher, K., Kurylo III, M. , Mellouki, A., Miller, J., Nielsen, O., Orkin, V., Prinn, R., Rhew, R., Santee, M., Stohl, A., and Verdonik, D.: Ozone-depleting substances andrelated
chemicals, in Scientific Assessment of Ozone Depletion: 2010, Global Ozone
Research and Monitoring Project – Report No. 52, WMO, Geneva, Switzerland,
2011.
Nightingale, P. D., Malin, G., and Liss, P. S.: Production of chloroform and
other low molecular-weight halocarbons by some species of macroalgae,
Limnol. Oceanogr., 40, 680–689,
https://doi.org/10.4319/lo.1995.40.4.0680, 1995.
Nightingale, P. D., Malin, G., Law, C. S., Watson, A. J., Liss, P. S.,
Liddicoat, M. I., Boutin, J., and Upstill-Goddard, R. C.: In situ evaluation
of air-sea gas exchange parameterizations using novel conservative and
volatile tracers, Global Biogeochem. Cy., 14, 373–387,
https://doi.org/10.1029/1999GB900091, 2000.
Patra, A. K.: Enteric methane mitigation technologies for ruminant
livestock: a synthesis of current research and future directions, Environ.
Monit. Assess., 184, 1929–1952, https://doi.org/10.1007/s10661-011-2090-y, 2012.
Paul, N. A., de Nys, R., and Steinberg, P. D.: Chemical defence against
bacteria in the red alga Asparagopsis armata: linking structure with
function, Mar. Ecol. Prog. Ser., 306, 87–101, https://doi.org/10.3354/meps306087,
2006.
Pisso, I., Haynes, P. H., and Law, K. S.: Emission location dependent ozone depletion potentials for very short-lived halogenated species, Atmos. Chem. Phys., 10, 12025–12036, https://doi.org/10.5194/acp-10-12025-2010, 2010.
Pisso, I., Sollum, E., Grythe, H., Kristiansen, N. I., Cassiani, M., Eckhardt, S., Arnold, D., Morton, D., Thompson, R. L., Groot Zwaaftink, C. D., Evangeliou, N., Sodemann, H., Haimberger, L., Henne, S., Brunner, D., Burkhart, J. F., Fouilloux, A., Brioude, J., Philipp, A., Seibert, P., and Stohl, A.: The Lagrangian particle dispersion model FLEXPART version 10.4, Geosci. Model Dev., 12, 4955–4997, https://doi.org/10.5194/gmd-12-4955-2019, 2019.
Quack, B. and Wallace, D. W. R.: Air-sea flux of bromoform: Controls,
rates, and implications, Global Biogeochem. Cy., 17, 1023,
https://doi.org/10.1029/2002GB001890, 2003.
Roque, B. M., Venegas, M., Kinley, R. D., de Nys, R., Duarte, T. L., Yang,
X., and Kebreab, E.: Red seaweed (Asparagopsis taxiformis) supplementation
reduces enteric methane by over 80 percent in beef steers, PLOS ONE, 16,
e0247820, https://doi.org/10.1371/journal.pone.0247820, 2021.
Sinnhuber, B.-M. and Meul, S.: Simulating the impact of emissions of
brominated very short lived substances on past stratospheric ozone trends,
Geophys. Res. Lett., 42, 2449–2456,
https://doi.org/10.1002/2014GL062975, 2015.
Stohl, A., Hittenberger, M., and Wotawa, G.: Validation of the lagrangian
particle dispersion model FLEXPART against large-scale tracer experiment
data, Atmos. Environ., 32, 4245–4264,
https://doi.org/10.1016/S1352-2310(98)00184-8, 1998.
Stohl, A. and Thomson, D.: A density correction for Lagrangian particle
dispersion models, Bound.-Lay. Meteorol., 90, 155–167,
https://doi.org/10.1023/A:1001741110696, 1999.
Stohl, A. and Trickl, T.: A textbook example of long-range transport:
Simultaneous observation of ozone maxima of stratospheric and North American
origin in the free troposphere over Europe, J. Geophys. Res.-Atmos., 104, 30445–30462, https://doi.org/10.1029/1999JD900803, 1999.
Tegtmeier, S., Ziska, F., Pisso, I., Quack, B., Velders, G. J. M., Yang, X., and Krüger, K.: Oceanic bromoform emissions weighted by their ozone depletion potential, Atmos. Chem. Phys., 15, 13647–13663, https://doi.org/10.5194/acp-15-13647-2015, 2015.
Tegtmeier, S., Atlas, E., Quack, B., Ziska, F., and Krüger, K.: Variability and past long-term changes of brominated very short-lived substances at the tropical tropopause, Atmos. Chem. Phys., 20, 7103–7123, https://doi.org/10.5194/acp-20-7103-2020, 2020.
Vucko, M. J., Magnusson, M., Kinley, R. D., Villart, C., and de Nys, R.: The
effects of processing on the in vitro antimethanogenic capacity and
concentration of secondary metabolites of Asparagopsis taxiformis, J. Appl.
Phycol., 29, 1577–1586, https://doi.org/10.1007/s10811-016-1004-3, 2017.
Wuebbles, D. J.: Chlorocarbon Emission Scenarios – Potential Impact on
Stratospheric Ozone, J. Geophys. Res.-Oceans, 88, 1433–1443,
https://doi.org/10.1029/JC088iC02p01433, 1983.
Yang, X., Abraham, N. L., Archibald, A. T., Braesicke, P., Keeble, J., Telford, P. J., Warwick, N. J., and Pyle, J. A.: How sensitive is the recovery of stratospheric ozone to changes in concentrations of very short-lived bromocarbons?, Atmos. Chem. Phys., 14, 10431–10438, https://doi.org/10.5194/acp-14-10431-2014, 2014.
Yong, Y. S., Yong, W. T. L., and Anton, A.: Analysis of formulae for
determination of seaweed growth rate, J. Appl. Phycol., 25,
1831–1834, https://doi.org/10.1007/s10811-013-0022-7, 2013.
Zhang, J., Wuebbles, D. J., Kinnison, D. E., and Saiz-Lopez, A.: Revising
the ozone depletion potentials metric for short-lived chemicals such as CF3I
and CH3I, J. Geophys. Res.-Atmos., 125, e2020JD032414,
https://doi.org/10.1029/2020JD032414, 2020.
Ziska, F., Quack, B., Abrahamsson, K., Archer, S. D., Atlas, E., Bell, T., Butler, J. H., Carpenter, L. J., Jones, C. E., Harris, N. R. P., Hepach, H., Heumann, K. G., Hughes, C., Kuss, J., Krüger, K., Liss, P., Moore, R. M., Orlikowska, A., Raimund, S., Reeves, C. E., Reifenhäuser, W., Robinson, A. D., Schall, C., Tanhua, T., Tegtmeier, S., Turner, S., Wang, L., Wallace, D., Williams, J., Yamamoto, H., Yvon-Lewis, S., and Yokouchi, Y.: Global sea-to-air flux climatology for bromoform, dibromomethane and methyl iodide, Atmos. Chem. Phys., 13, 8915–8934, https://doi.org/10.5194/acp-13-8915-2013, 2013.
Short summary
In this study, we assessed the potential risks of bromoform released from Asparagopsis farming near Australia for the stratospheric ozone layer by analyzing different cultivation scenarios. We conclude that the intended operation of Asparagopsis seaweed cultivation farms with an annual yield to meet the needs of 50 % of feedlots and cattle in either open-ocean or terrestrial cultures in Australia will not impact the ozone layer under normal operating conditions.
In this study, we assessed the potential risks of bromoform released from Asparagopsis farming...
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