The Influence of Antarctic Sea Ice Distribution on the Southern Ocean Overturning Circulation for the Past 20,000 Years
Changes in Southern Ocean physics are dynamically linked to westerly winds, ocean currents, and the distribution of Antarctic sea ice in the Southern Hemisphere. As a result, it is critical to comprehend the response of Southern Ocean physics to the distribution of Antarctic sea ice on a basin scale...
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2023
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Online Access: | https://doi.org/10.3390/IECG2022-14145 |
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ftmdpi:oai:mdpi.com:/2504-3900/87/1/9/ 2023-08-20T04:01:57+02:00 The Influence of Antarctic Sea Ice Distribution on the Southern Ocean Overturning Circulation for the Past 20,000 Years Gagan Mandal Jia-Yuh Yu Shih-Yu Lee 2023-03-13 application/pdf https://doi.org/10.3390/IECG2022-14145 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/IECG2022-14145 https://creativecommons.org/licenses/by/4.0/ Proceedings; Volume 87; Issue 1; Pages: 9 Southern Ocean 20,000 years before present buoyancy flux Antarctic sea ice Text 2023 ftmdpi https://doi.org/10.3390/IECG2022-14145 2023-08-01T10:11:43Z Changes in Southern Ocean physics are dynamically linked to westerly winds, ocean currents, and the distribution of Antarctic sea ice in the Southern Hemisphere. As a result, it is critical to comprehend the response of Southern Ocean physics to the distribution of Antarctic sea ice on a basin scale. This modeling study employs a fully coupled Earth system model to investigate the effect of Antarctic Sea ice distribution on Southern Ocean dynamics during the past 20,000 years. The findings show that the formation and melting of sea ice have an effect on the distribution of surface buoyancy flux over the Southern Ocean. The simulated sea ice edge (grid points in the ice model have a sea ice concentration above 5%) in the Southern Ocean almost demarcates the borderline between the lower and upper meridional overturning cells. The seemingly permanent Antarctic sea ice edge (grid points in the ice model with a sea ice concentration greater than 80%) coincides with the shift of buoyancy flux from positive (buoyancy gain) to negative (buoyancy loss). Furthermore, the negative surface buoyancy flux zone has shifted polewards for the past 20,000 years, with the exception of approximately 14.1 thousand years. Our findings show that Antarctic sea ice feedback affects the surface buoyancy flux, affecting the overturning circulation in the Southern Ocean. Text Antarc* Antarctic Sea ice Southern Ocean MDPI Open Access Publishing Antarctic Southern Ocean IECG 2022 9 |
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Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Southern Ocean 20,000 years before present buoyancy flux Antarctic sea ice |
spellingShingle |
Southern Ocean 20,000 years before present buoyancy flux Antarctic sea ice Gagan Mandal Jia-Yuh Yu Shih-Yu Lee The Influence of Antarctic Sea Ice Distribution on the Southern Ocean Overturning Circulation for the Past 20,000 Years |
topic_facet |
Southern Ocean 20,000 years before present buoyancy flux Antarctic sea ice |
description |
Changes in Southern Ocean physics are dynamically linked to westerly winds, ocean currents, and the distribution of Antarctic sea ice in the Southern Hemisphere. As a result, it is critical to comprehend the response of Southern Ocean physics to the distribution of Antarctic sea ice on a basin scale. This modeling study employs a fully coupled Earth system model to investigate the effect of Antarctic Sea ice distribution on Southern Ocean dynamics during the past 20,000 years. The findings show that the formation and melting of sea ice have an effect on the distribution of surface buoyancy flux over the Southern Ocean. The simulated sea ice edge (grid points in the ice model have a sea ice concentration above 5%) in the Southern Ocean almost demarcates the borderline between the lower and upper meridional overturning cells. The seemingly permanent Antarctic sea ice edge (grid points in the ice model with a sea ice concentration greater than 80%) coincides with the shift of buoyancy flux from positive (buoyancy gain) to negative (buoyancy loss). Furthermore, the negative surface buoyancy flux zone has shifted polewards for the past 20,000 years, with the exception of approximately 14.1 thousand years. Our findings show that Antarctic sea ice feedback affects the surface buoyancy flux, affecting the overturning circulation in the Southern Ocean. |
format |
Text |
author |
Gagan Mandal Jia-Yuh Yu Shih-Yu Lee |
author_facet |
Gagan Mandal Jia-Yuh Yu Shih-Yu Lee |
author_sort |
Gagan Mandal |
title |
The Influence of Antarctic Sea Ice Distribution on the Southern Ocean Overturning Circulation for the Past 20,000 Years |
title_short |
The Influence of Antarctic Sea Ice Distribution on the Southern Ocean Overturning Circulation for the Past 20,000 Years |
title_full |
The Influence of Antarctic Sea Ice Distribution on the Southern Ocean Overturning Circulation for the Past 20,000 Years |
title_fullStr |
The Influence of Antarctic Sea Ice Distribution on the Southern Ocean Overturning Circulation for the Past 20,000 Years |
title_full_unstemmed |
The Influence of Antarctic Sea Ice Distribution on the Southern Ocean Overturning Circulation for the Past 20,000 Years |
title_sort |
influence of antarctic sea ice distribution on the southern ocean overturning circulation for the past 20,000 years |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/IECG2022-14145 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_source |
Proceedings; Volume 87; Issue 1; Pages: 9 |
op_relation |
https://dx.doi.org/10.3390/IECG2022-14145 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/IECG2022-14145 |
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IECG 2022 |
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9 |
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