An Unprecedented Sea Ice Retreat in the Weddell Sea Driving an Overall Decrease of the Antarctic Seaâ€Ice Extent Over the 20th Century
Sea-ice extent is predicted to decrease in a warming climate. However, despite global warming over the past century, total Antarctic sea ice remained relatively stable from 1979 until 2015, before strongly melting. Here we explore the long-term sea ice variability by reconstructing Antarctic sea ice...
Published in: | Geophysical Research Letters |
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Language: | English |
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Wiley-Blackwell Publishing, Inc.
2023
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Online Access: | http://hdl.handle.net/2078.1/279271 https://doi.org/10.1029/2023gl104666 |
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ftunivlouvain:oai:dial.uclouvain.be:boreal:279271 2024-05-12T07:52:48+00:00 An Unprecedented Sea Ice Retreat in the Weddell Sea Driving an Overall Decrease of the Antarctic Seaâ€Ice Extent Over the 20th Century Dalaiden, Quentin Rezsöhazy, Jeanne Goosse, Hugues Thomas, Elizabeth R. Vladimirova, Diana O. Tetzner, Dieter UCL - SST/ELI/ELIC - Earth & Climate 2023 http://hdl.handle.net/2078.1/279271 https://doi.org/10.1029/2023gl104666 eng eng Wiley-Blackwell Publishing, Inc. boreal:279271 http://hdl.handle.net/2078.1/279271 doi:10.1029/2023gl104666 urn:ISSN:0094-8276 urn:EISSN:1944-8007 info:eu-repo/semantics/openAccess Geophysical Research Letters, Vol. 50, no.21, p. 12 (2023) General Earth and Planetary Sciences Geophysics info:eu-repo/semantics/article 2023 ftunivlouvain https://doi.org/10.1029/2023gl104666 2024-04-17T16:28:33Z Sea-ice extent is predicted to decrease in a warming climate. However, despite global warming over the past century, total Antarctic sea ice remained relatively stable from 1979 until 2015, before strongly melting. Here we explore the long-term sea ice variability by reconstructing Antarctic sea ice since 1700 CE, based on paleoclimate records and data assimilation. Our results indicate a decline in southern hemisphere sea-ice extent over the 20th century, driven by a reduction of 0.26 million km2 in the Weddell Sea that reached values at the end of the century lower than any other reconstructed period. The Ross Sea experienced an increasing sea-ice cover trend due to a low-pressure system located off the Amundsen Sea coast, offset by a decreasing trend in the Bellingshausen-Amundsen Sea. Models failed to account for the Ross Sea increase, resulting in an overly uniform estimate of Antarctic sea ice loss over the 20th century. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Ross Sea Sea ice Weddell Sea DIAL@UCLouvain (Université catholique de Louvain) Antarctic The Antarctic Weddell Sea Ross Sea Amundsen Sea Weddell Geophysical Research Letters 50 21 |
institution |
Open Polar |
collection |
DIAL@UCLouvain (Université catholique de Louvain) |
op_collection_id |
ftunivlouvain |
language |
English |
topic |
General Earth and Planetary Sciences Geophysics |
spellingShingle |
General Earth and Planetary Sciences Geophysics Dalaiden, Quentin Rezsöhazy, Jeanne Goosse, Hugues Thomas, Elizabeth R. Vladimirova, Diana O. Tetzner, Dieter An Unprecedented Sea Ice Retreat in the Weddell Sea Driving an Overall Decrease of the Antarctic Seaâ€Ice Extent Over the 20th Century |
topic_facet |
General Earth and Planetary Sciences Geophysics |
description |
Sea-ice extent is predicted to decrease in a warming climate. However, despite global warming over the past century, total Antarctic sea ice remained relatively stable from 1979 until 2015, before strongly melting. Here we explore the long-term sea ice variability by reconstructing Antarctic sea ice since 1700 CE, based on paleoclimate records and data assimilation. Our results indicate a decline in southern hemisphere sea-ice extent over the 20th century, driven by a reduction of 0.26 million km2 in the Weddell Sea that reached values at the end of the century lower than any other reconstructed period. The Ross Sea experienced an increasing sea-ice cover trend due to a low-pressure system located off the Amundsen Sea coast, offset by a decreasing trend in the Bellingshausen-Amundsen Sea. Models failed to account for the Ross Sea increase, resulting in an overly uniform estimate of Antarctic sea ice loss over the 20th century. |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Dalaiden, Quentin Rezsöhazy, Jeanne Goosse, Hugues Thomas, Elizabeth R. Vladimirova, Diana O. Tetzner, Dieter |
author_facet |
Dalaiden, Quentin Rezsöhazy, Jeanne Goosse, Hugues Thomas, Elizabeth R. Vladimirova, Diana O. Tetzner, Dieter |
author_sort |
Dalaiden, Quentin |
title |
An Unprecedented Sea Ice Retreat in the Weddell Sea Driving an Overall Decrease of the Antarctic Seaâ€Ice Extent Over the 20th Century |
title_short |
An Unprecedented Sea Ice Retreat in the Weddell Sea Driving an Overall Decrease of the Antarctic Seaâ€Ice Extent Over the 20th Century |
title_full |
An Unprecedented Sea Ice Retreat in the Weddell Sea Driving an Overall Decrease of the Antarctic Seaâ€Ice Extent Over the 20th Century |
title_fullStr |
An Unprecedented Sea Ice Retreat in the Weddell Sea Driving an Overall Decrease of the Antarctic Seaâ€Ice Extent Over the 20th Century |
title_full_unstemmed |
An Unprecedented Sea Ice Retreat in the Weddell Sea Driving an Overall Decrease of the Antarctic Seaâ€Ice Extent Over the 20th Century |
title_sort |
unprecedented sea ice retreat in the weddell sea driving an overall decrease of the antarctic seaâ€ice extent over the 20th century |
publisher |
Wiley-Blackwell Publishing, Inc. |
publishDate |
2023 |
url |
http://hdl.handle.net/2078.1/279271 https://doi.org/10.1029/2023gl104666 |
geographic |
Antarctic The Antarctic Weddell Sea Ross Sea Amundsen Sea Weddell |
geographic_facet |
Antarctic The Antarctic Weddell Sea Ross Sea Amundsen Sea Weddell |
genre |
Amundsen Sea Antarc* Antarctic Ross Sea Sea ice Weddell Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Ross Sea Sea ice Weddell Sea |
op_source |
Geophysical Research Letters, Vol. 50, no.21, p. 12 (2023) |
op_relation |
boreal:279271 http://hdl.handle.net/2078.1/279271 doi:10.1029/2023gl104666 urn:ISSN:0094-8276 urn:EISSN:1944-8007 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2023gl104666 |
container_title |
Geophysical Research Letters |
container_volume |
50 |
container_issue |
21 |
_version_ |
1798837933991526400 |