Impacts of Observed Extreme Antarctic Sea Ice Conditions on the Southern Hemisphere Atmosphere
The Antarctic sea ice has undergone dramatic changes in recent years, with the highest recorded sea ice extent in 2014 and the lowest in 2017. We investigated the impacts of the observed changes in these two extremes of Antarctic sea ice conditions on the atmospheric circulation in the Southern Hemi...
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ftmdpi:oai:mdpi.com:/2073-4433/14/1/36/ 2023-08-20T03:59:36+02:00 Impacts of Observed Extreme Antarctic Sea Ice Conditions on the Southern Hemisphere Atmosphere Zhu Zhu Mirong Song agris 2022-12-24 application/pdf https://doi.org/10.3390/atmos14010036 EN eng Multidisciplinary Digital Publishing Institute Atmospheric Techniques, Instruments, and Modeling https://dx.doi.org/10.3390/atmos14010036 https://creativecommons.org/licenses/by/4.0/ Atmosphere; Volume 14; Issue 1; Pages: 36 model simulations Antarctic sea ice Southern Hemisphere climate Text 2022 ftmdpi https://doi.org/10.3390/atmos14010036 2023-08-01T07:57:46Z The Antarctic sea ice has undergone dramatic changes in recent years, with the highest recorded sea ice extent in 2014 and the lowest in 2017. We investigated the impacts of the observed changes in these two extremes of Antarctic sea ice conditions on the atmospheric circulation in the Southern Hemisphere. We conducted three numerical simulations with different seasonal cycles of Antarctic sea ice forcings using the Community Atmosphere Model Version 5: the maximum sea ice extent in 2014 (ICE_14), the minimum sea ice extent in 2017 (ICE_17), and the average sea ice extent between 1981 and 2010 (ICE_clm, reference simulation). Our results suggest that the atmospheric response in the Southern Hemisphere showed strong seasonal variations and the atmospheric circulation in winter was more sensitive to the decreased Antarctic sea ice in 2017 than the increased sea ice in 2014. In ICE_14, the westerlies over the polar region were enhanced in summer, but there was no significant change in the zonal-averaged wind in winter. In contrast, in ICE_17, there was a clear equatorward shift in the subtropical jet in winter, but no significant change in summer. The temperature responses were limited to the Antarctic coast, where there were changes in the sea ice in ICE_14 and ICE_17. The warming on the coast of the Amundsen Sea in summer led to a slight increase in precipitation in both simulations. Text Amundsen Sea Antarc* Antarctic Sea ice MDPI Open Access Publishing Antarctic The Antarctic Amundsen Sea Atmosphere 14 1 36 |
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MDPI Open Access Publishing |
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English |
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model simulations Antarctic sea ice Southern Hemisphere climate |
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model simulations Antarctic sea ice Southern Hemisphere climate Zhu Zhu Mirong Song Impacts of Observed Extreme Antarctic Sea Ice Conditions on the Southern Hemisphere Atmosphere |
topic_facet |
model simulations Antarctic sea ice Southern Hemisphere climate |
description |
The Antarctic sea ice has undergone dramatic changes in recent years, with the highest recorded sea ice extent in 2014 and the lowest in 2017. We investigated the impacts of the observed changes in these two extremes of Antarctic sea ice conditions on the atmospheric circulation in the Southern Hemisphere. We conducted three numerical simulations with different seasonal cycles of Antarctic sea ice forcings using the Community Atmosphere Model Version 5: the maximum sea ice extent in 2014 (ICE_14), the minimum sea ice extent in 2017 (ICE_17), and the average sea ice extent between 1981 and 2010 (ICE_clm, reference simulation). Our results suggest that the atmospheric response in the Southern Hemisphere showed strong seasonal variations and the atmospheric circulation in winter was more sensitive to the decreased Antarctic sea ice in 2017 than the increased sea ice in 2014. In ICE_14, the westerlies over the polar region were enhanced in summer, but there was no significant change in the zonal-averaged wind in winter. In contrast, in ICE_17, there was a clear equatorward shift in the subtropical jet in winter, but no significant change in summer. The temperature responses were limited to the Antarctic coast, where there were changes in the sea ice in ICE_14 and ICE_17. The warming on the coast of the Amundsen Sea in summer led to a slight increase in precipitation in both simulations. |
format |
Text |
author |
Zhu Zhu Mirong Song |
author_facet |
Zhu Zhu Mirong Song |
author_sort |
Zhu Zhu |
title |
Impacts of Observed Extreme Antarctic Sea Ice Conditions on the Southern Hemisphere Atmosphere |
title_short |
Impacts of Observed Extreme Antarctic Sea Ice Conditions on the Southern Hemisphere Atmosphere |
title_full |
Impacts of Observed Extreme Antarctic Sea Ice Conditions on the Southern Hemisphere Atmosphere |
title_fullStr |
Impacts of Observed Extreme Antarctic Sea Ice Conditions on the Southern Hemisphere Atmosphere |
title_full_unstemmed |
Impacts of Observed Extreme Antarctic Sea Ice Conditions on the Southern Hemisphere Atmosphere |
title_sort |
impacts of observed extreme antarctic sea ice conditions on the southern hemisphere atmosphere |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/atmos14010036 |
op_coverage |
agris |
geographic |
Antarctic The Antarctic Amundsen Sea |
geographic_facet |
Antarctic The Antarctic Amundsen Sea |
genre |
Amundsen Sea Antarc* Antarctic Sea ice |
genre_facet |
Amundsen Sea Antarc* Antarctic Sea ice |
op_source |
Atmosphere; Volume 14; Issue 1; Pages: 36 |
op_relation |
Atmospheric Techniques, Instruments, and Modeling https://dx.doi.org/10.3390/atmos14010036 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/atmos14010036 |
container_title |
Atmosphere |
container_volume |
14 |
container_issue |
1 |
container_start_page |
36 |
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