An unprecedented sea ice retreat in the Weddell Sea driving an overall decrease of the Antarctic sea-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 |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union
2023
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/534462/ https://nora.nerc.ac.uk/id/eprint/534462/1/Geophysical%20Research%20Letters%20-%202023%20-%20Dalaiden%20-%20An%20Unprecedented%20Sea%20Ice%20Retreat%20in%20the%20Weddell%20Sea%20Driving%20an%20Overall.pdf https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GL104666 |
id |
ftnerc:oai:nora.nerc.ac.uk:534462 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:534462 2023-12-10T09:39:34+01:00 An unprecedented sea ice retreat in the Weddell Sea driving an overall decrease of the Antarctic sea-ice extent over the 20th century Dalaiden, Quentin Rezsohazy, Jeanne Goosse, Hugues Thomas, Elizabeth R. Vladimirova, Diana O. Tetzner, Dieter 2023-11-16 text http://nora.nerc.ac.uk/id/eprint/534462/ https://nora.nerc.ac.uk/id/eprint/534462/1/Geophysical%20Research%20Letters%20-%202023%20-%20Dalaiden%20-%20An%20Unprecedented%20Sea%20Ice%20Retreat%20in%20the%20Weddell%20Sea%20Driving%20an%20Overall.pdf https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GL104666 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/534462/1/Geophysical%20Research%20Letters%20-%202023%20-%20Dalaiden%20-%20An%20Unprecedented%20Sea%20Ice%20Retreat%20in%20the%20Weddell%20Sea%20Driving%20an%20Overall.pdf Dalaiden, Quentin; Rezsohazy, Jeanne; Goosse, Hugues; Thomas, Elizabeth R. orcid:0000-0002-3010-6493 Vladimirova, Diana O. orcid:0000-0002-1678-0174 Tetzner, Dieter orcid:0000-0001-7659-8799 . 2023 An unprecedented sea ice retreat in the Weddell Sea driving an overall decrease of the Antarctic sea-ice extent over the 20th century. Geophysical Research Letters, 50 (21), e2023GL104666. 12, pp. https://doi.org/10.1029/2023GL104666 <https://doi.org/10.1029/2023GL104666> cc_by_nc_4 Publication - Article PeerReviewed 2023 ftnerc https://doi.org/10.1029/2023GL104666 2023-11-10T00:03:07Z 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 Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Weddell Sea Ross Sea Amundsen Sea Weddell Geophysical Research Letters 50 21 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
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. |
format |
Article in Journal/Newspaper |
author |
Dalaiden, Quentin Rezsohazy, Jeanne Goosse, Hugues Thomas, Elizabeth R. Vladimirova, Diana O. Tetzner, Dieter |
spellingShingle |
Dalaiden, Quentin Rezsohazy, 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 sea-ice extent over the 20th century |
author_facet |
Dalaiden, Quentin Rezsohazy, 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 sea-ice extent over the 20th century |
title_short |
An unprecedented sea ice retreat in the Weddell Sea driving an overall decrease of the Antarctic sea-ice extent over the 20th century |
title_full |
An unprecedented sea ice retreat in the Weddell Sea driving an overall decrease of the Antarctic sea-ice extent over the 20th century |
title_fullStr |
An unprecedented sea ice retreat in the Weddell Sea driving an overall decrease of the Antarctic sea-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 sea-ice extent over the 20th century |
title_sort |
unprecedented sea ice retreat in the weddell sea driving an overall decrease of the antarctic sea-ice extent over the 20th century |
publisher |
American Geophysical Union |
publishDate |
2023 |
url |
http://nora.nerc.ac.uk/id/eprint/534462/ https://nora.nerc.ac.uk/id/eprint/534462/1/Geophysical%20Research%20Letters%20-%202023%20-%20Dalaiden%20-%20An%20Unprecedented%20Sea%20Ice%20Retreat%20in%20the%20Weddell%20Sea%20Driving%20an%20Overall.pdf https://agupubs.onlinelibrary.wiley.com/doi/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_relation |
https://nora.nerc.ac.uk/id/eprint/534462/1/Geophysical%20Research%20Letters%20-%202023%20-%20Dalaiden%20-%20An%20Unprecedented%20Sea%20Ice%20Retreat%20in%20the%20Weddell%20Sea%20Driving%20an%20Overall.pdf Dalaiden, Quentin; Rezsohazy, Jeanne; Goosse, Hugues; Thomas, Elizabeth R. orcid:0000-0002-3010-6493 Vladimirova, Diana O. orcid:0000-0002-1678-0174 Tetzner, Dieter orcid:0000-0001-7659-8799 . 2023 An unprecedented sea ice retreat in the Weddell Sea driving an overall decrease of the Antarctic sea-ice extent over the 20th century. Geophysical Research Letters, 50 (21), e2023GL104666. 12, pp. https://doi.org/10.1029/2023GL104666 <https://doi.org/10.1029/2023GL104666> |
op_rights |
cc_by_nc_4 |
op_doi |
https://doi.org/10.1029/2023GL104666 |
container_title |
Geophysical Research Letters |
container_volume |
50 |
container_issue |
21 |
_version_ |
1784886887547142144 |