Interannual SAM modulation of Antarctic sea ice extent does not account for its long-term trends, pointing to a limited role for ozone depletion
The expansion of Antarctic sea ice since 1979 in the presence of increasing greenhouse gases remains one of the most puzzling features of current climate change. Some studies have proposed that the formation of the ozone hole, via the Southern Annular Mode, might explain that expansion, and a recent...
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ftunivtasmania:oai:eprints.utas.edu.au:38768 2023-05-15T13:43:28+02:00 Interannual SAM modulation of Antarctic sea ice extent does not account for its long-term trends, pointing to a limited role for ozone depletion Polvani, LM Banerjee, A Chemkee, R Doddridge, E Ferreira, D Gnanadesikan, A Holland, MA Kostov, Y Marshall, J Seviour, WJM Solomon, S Waugh, DW 2021 application/pdf https://eprints.utas.edu.au/38768/ https://eprints.utas.edu.au/38768/1/147619%20-%20Interannual%20SAM%20modulation%20of%20Antarctic%20sea%20ice.pdf en eng Amer Geophysical Union https://eprints.utas.edu.au/38768/1/147619%20-%20Interannual%20SAM%20modulation%20of%20Antarctic%20sea%20ice.pdf Polvani, LM, Banerjee, A, Chemkee, R, Doddridge, E orcid:0000-0002-6097-5729 , Ferreira, D, Gnanadesikan, A, Holland, MA, Kostov, Y, Marshall, J, Seviour, WJM, Solomon, S and Waugh, DW 2021 , 'Interannual SAM modulation of Antarctic sea ice extent does not account for its long-term trends, pointing to a limited role for ozone depletion' , Geophysical Research Letters, vol. 48, no. 21 , pp. 1-10 , doi:10.1029/2021GL094871 <http://dx.doi.org/10.1029/2021GL094871>. ice ozone Southern Ocean Article PeerReviewed 2021 ftunivtasmania https://doi.org/10.1029/2021GL094871 2022-06-06T22:16:37Z The expansion of Antarctic sea ice since 1979 in the presence of increasing greenhouse gases remains one of the most puzzling features of current climate change. Some studies have proposed that the formation of the ozone hole, via the Southern Annular Mode, might explain that expansion, and a recent paper highlighted a robust causal link between summertime Southern Annular Mode (SAM) anomalies and sea ice anomalies in the subsequent autumn. Here we show that many models are able to capture this relationship between the SAM and sea ice, but also emphasize that the SAM only explains a small fraction of the year-to-year variability. Finally, examining multidecadal trends, in models and in observations, we confirm the findings of several previous studies and conclude that the SAM–and thus the ozone hole–are not the primary drivers of the sea ice expansion around Antarctica in recent decades. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Southern Ocean University of Tasmania: UTas ePrints Antarctic Southern Ocean Geophysical Research Letters 48 21 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
ice ozone Southern Ocean |
spellingShingle |
ice ozone Southern Ocean Polvani, LM Banerjee, A Chemkee, R Doddridge, E Ferreira, D Gnanadesikan, A Holland, MA Kostov, Y Marshall, J Seviour, WJM Solomon, S Waugh, DW Interannual SAM modulation of Antarctic sea ice extent does not account for its long-term trends, pointing to a limited role for ozone depletion |
topic_facet |
ice ozone Southern Ocean |
description |
The expansion of Antarctic sea ice since 1979 in the presence of increasing greenhouse gases remains one of the most puzzling features of current climate change. Some studies have proposed that the formation of the ozone hole, via the Southern Annular Mode, might explain that expansion, and a recent paper highlighted a robust causal link between summertime Southern Annular Mode (SAM) anomalies and sea ice anomalies in the subsequent autumn. Here we show that many models are able to capture this relationship between the SAM and sea ice, but also emphasize that the SAM only explains a small fraction of the year-to-year variability. Finally, examining multidecadal trends, in models and in observations, we confirm the findings of several previous studies and conclude that the SAM–and thus the ozone hole–are not the primary drivers of the sea ice expansion around Antarctica in recent decades. |
format |
Article in Journal/Newspaper |
author |
Polvani, LM Banerjee, A Chemkee, R Doddridge, E Ferreira, D Gnanadesikan, A Holland, MA Kostov, Y Marshall, J Seviour, WJM Solomon, S Waugh, DW |
author_facet |
Polvani, LM Banerjee, A Chemkee, R Doddridge, E Ferreira, D Gnanadesikan, A Holland, MA Kostov, Y Marshall, J Seviour, WJM Solomon, S Waugh, DW |
author_sort |
Polvani, LM |
title |
Interannual SAM modulation of Antarctic sea ice extent does not account for its long-term trends, pointing to a limited role for ozone depletion |
title_short |
Interannual SAM modulation of Antarctic sea ice extent does not account for its long-term trends, pointing to a limited role for ozone depletion |
title_full |
Interannual SAM modulation of Antarctic sea ice extent does not account for its long-term trends, pointing to a limited role for ozone depletion |
title_fullStr |
Interannual SAM modulation of Antarctic sea ice extent does not account for its long-term trends, pointing to a limited role for ozone depletion |
title_full_unstemmed |
Interannual SAM modulation of Antarctic sea ice extent does not account for its long-term trends, pointing to a limited role for ozone depletion |
title_sort |
interannual sam modulation of antarctic sea ice extent does not account for its long-term trends, pointing to a limited role for ozone depletion |
publisher |
Amer Geophysical Union |
publishDate |
2021 |
url |
https://eprints.utas.edu.au/38768/ https://eprints.utas.edu.au/38768/1/147619%20-%20Interannual%20SAM%20modulation%20of%20Antarctic%20sea%20ice.pdf |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
op_relation |
https://eprints.utas.edu.au/38768/1/147619%20-%20Interannual%20SAM%20modulation%20of%20Antarctic%20sea%20ice.pdf Polvani, LM, Banerjee, A, Chemkee, R, Doddridge, E orcid:0000-0002-6097-5729 , Ferreira, D, Gnanadesikan, A, Holland, MA, Kostov, Y, Marshall, J, Seviour, WJM, Solomon, S and Waugh, DW 2021 , 'Interannual SAM modulation of Antarctic sea ice extent does not account for its long-term trends, pointing to a limited role for ozone depletion' , Geophysical Research Letters, vol. 48, no. 21 , pp. 1-10 , doi:10.1029/2021GL094871 <http://dx.doi.org/10.1029/2021GL094871>. |
op_doi |
https://doi.org/10.1029/2021GL094871 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
21 |
_version_ |
1766189242589904896 |