Antarctic Ice Sheet freshwater discharge drives substantial Southern Ocean changes over the 21$^{st}$ century
Multidecadal satellite observations indicate that the Antarctic Ice Sheet (AIS) is losing mass at an accelerating rate, potentially impacting many aspects of the coupled climate system. While previous studies have demonstrated the importance of AIS freshwater discharge for regional and global climat...
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2023
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Online Access: | http://dx.doi.org/10.22541/essoar.168771427.74160260/v1 |
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crwinnower:10.22541/essoar.168771427.74160260/v1 2024-06-02T07:56:19+00:00 Antarctic Ice Sheet freshwater discharge drives substantial Southern Ocean changes over the 21$^{st}$ century Gorte, Tessa Lovenduski, Nicole Suzanne Nissen, Cara Lenaerts, Jan Thérèse Maria 2023 http://dx.doi.org/10.22541/essoar.168771427.74160260/v1 unknown Authorea, Inc. posted-content 2023 crwinnower https://doi.org/10.22541/essoar.168771427.74160260/v1 2024-05-07T14:19:21Z Multidecadal satellite observations indicate that the Antarctic Ice Sheet (AIS) is losing mass at an accelerating rate, potentially impacting many aspects of the coupled climate system. While previous studies have demonstrated the importance of AIS freshwater discharge for regional and global climate processes using climate model experiments, many have applied unrealistic freshwater forcing. Here, we explore the potential Southern Ocean impacts of realistic AIS mass loss over the 21$^{st}$ century in the Community Earth System Model version 2 (CESM2) by applying observation-based historical and ice sheet model-based future AIS freshwater forcing. The added freshwater reduces wintertime deep convective area by 72\% while retaining 83\% more sea ice. Congruent with other studies, we find the increased freshwater discharge extensively impacts local and remote Southern Ocean surface and subsurface temperature and stratification. These results demonstrate the necessity of accounting for AIS mass loss in global climate models for projecting future climate. Other/Unknown Material Antarc* Antarctic Ice Sheet Sea ice Southern Ocean The Winnower Antarctic Southern Ocean The Antarctic |
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Open Polar |
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The Winnower |
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crwinnower |
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description |
Multidecadal satellite observations indicate that the Antarctic Ice Sheet (AIS) is losing mass at an accelerating rate, potentially impacting many aspects of the coupled climate system. While previous studies have demonstrated the importance of AIS freshwater discharge for regional and global climate processes using climate model experiments, many have applied unrealistic freshwater forcing. Here, we explore the potential Southern Ocean impacts of realistic AIS mass loss over the 21$^{st}$ century in the Community Earth System Model version 2 (CESM2) by applying observation-based historical and ice sheet model-based future AIS freshwater forcing. The added freshwater reduces wintertime deep convective area by 72\% while retaining 83\% more sea ice. Congruent with other studies, we find the increased freshwater discharge extensively impacts local and remote Southern Ocean surface and subsurface temperature and stratification. These results demonstrate the necessity of accounting for AIS mass loss in global climate models for projecting future climate. |
format |
Other/Unknown Material |
author |
Gorte, Tessa Lovenduski, Nicole Suzanne Nissen, Cara Lenaerts, Jan Thérèse Maria |
spellingShingle |
Gorte, Tessa Lovenduski, Nicole Suzanne Nissen, Cara Lenaerts, Jan Thérèse Maria Antarctic Ice Sheet freshwater discharge drives substantial Southern Ocean changes over the 21$^{st}$ century |
author_facet |
Gorte, Tessa Lovenduski, Nicole Suzanne Nissen, Cara Lenaerts, Jan Thérèse Maria |
author_sort |
Gorte, Tessa |
title |
Antarctic Ice Sheet freshwater discharge drives substantial Southern Ocean changes over the 21$^{st}$ century |
title_short |
Antarctic Ice Sheet freshwater discharge drives substantial Southern Ocean changes over the 21$^{st}$ century |
title_full |
Antarctic Ice Sheet freshwater discharge drives substantial Southern Ocean changes over the 21$^{st}$ century |
title_fullStr |
Antarctic Ice Sheet freshwater discharge drives substantial Southern Ocean changes over the 21$^{st}$ century |
title_full_unstemmed |
Antarctic Ice Sheet freshwater discharge drives substantial Southern Ocean changes over the 21$^{st}$ century |
title_sort |
antarctic ice sheet freshwater discharge drives substantial southern ocean changes over the 21$^{st}$ century |
publisher |
Authorea, Inc. |
publishDate |
2023 |
url |
http://dx.doi.org/10.22541/essoar.168771427.74160260/v1 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet Sea ice Southern Ocean |
op_doi |
https://doi.org/10.22541/essoar.168771427.74160260/v1 |
_version_ |
1800755165302620160 |