The circum-Antarctic ice-shelves respond to a more positive Southern Annular Mode with regionally varied melting
The Southern Hemisphere cryosphere has recently shown regionally-contrasted responses to climate change, in particular to the positive phases of the Southern Annular Mode. However, the understanding of the impacts of this mode on ice-shelf basal melt at a circum-Antarctic scale is still limited. Her...
Published in: | Communications Earth & Environment |
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Language: | English |
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2022
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Online Access: | http://hdl.handle.net/2078.1/262431 https://doi.org/10.1038/s43247-022-00458-x |
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ftunivlouvain:oai:dial.uclouvain.be:boreal:262431 2024-05-12T07:53:28+00:00 The circum-Antarctic ice-shelves respond to a more positive Southern Annular Mode with regionally varied melting Verfaillie, Deborah Pelletier, Charles Goosse, Hugues Jourdain, Nicolas C. Bull, Christopher Y. S. Dalaiden, Quentin Favier, Vincent Fichefet, Thierry Wille, Jonathan D. UCL - SST/ELI/ELIC - Earth & Climate 2022 http://hdl.handle.net/2078.1/262431 https://doi.org/10.1038/s43247-022-00458-x eng eng Springer Science and Business Media LLC boreal:262431 http://hdl.handle.net/2078.1/262431 doi:10.1038/s43247-022-00458-x urn:EISSN:2662-4435 info:eu-repo/semantics/openAccess Communications Earth & Environment, Vol. 3, no.1, p. 12 (2022) General Earth and Planetary Sciences General Environmental Science info:eu-repo/semantics/article 2022 ftunivlouvain https://doi.org/10.1038/s43247-022-00458-x 2024-04-17T16:34:35Z The Southern Hemisphere cryosphere has recently shown regionally-contrasted responses to climate change, in particular to the positive phases of the Southern Annular Mode. However, the understanding of the impacts of this mode on ice-shelf basal melt at a circum-Antarctic scale is still limited. Here, we performed idealized experiments with a pan-Antarctic regional ice-shelf cavity-resolving ocean—sea-ice model for different phases of the Southern Annular Mode. We show that positive phases lead to increased upwelling and subsurface ocean temperature and salinity close to ice shelves, while the opposite occurs for negative phases. A one-standard-deviation increase of the Southern Annular Mode leads to a net basal mass loss of 40 Gt yr−1, with strong regional contrasts: increased ice-shelf basal melt in the Bellingshausen and Western Pacific sectors and the opposite response in the Amundsen sector. Estimates of 1000–1200 and 2090–2100 ice-shelf basal melt changes due to the Southern Annular Mode are −86.6 Gt yr−1 and 55.0 to 164.9 Gt yr−1, respectively, compared to the present. Article in Journal/Newspaper Antarc* Antarctic Ice Shelf Ice Shelves Sea ice DIAL@UCLouvain (Université catholique de Louvain) Antarctic Pacific Communications Earth & Environment 3 1 |
institution |
Open Polar |
collection |
DIAL@UCLouvain (Université catholique de Louvain) |
op_collection_id |
ftunivlouvain |
language |
English |
topic |
General Earth and Planetary Sciences General Environmental Science |
spellingShingle |
General Earth and Planetary Sciences General Environmental Science Verfaillie, Deborah Pelletier, Charles Goosse, Hugues Jourdain, Nicolas C. Bull, Christopher Y. S. Dalaiden, Quentin Favier, Vincent Fichefet, Thierry Wille, Jonathan D. The circum-Antarctic ice-shelves respond to a more positive Southern Annular Mode with regionally varied melting |
topic_facet |
General Earth and Planetary Sciences General Environmental Science |
description |
The Southern Hemisphere cryosphere has recently shown regionally-contrasted responses to climate change, in particular to the positive phases of the Southern Annular Mode. However, the understanding of the impacts of this mode on ice-shelf basal melt at a circum-Antarctic scale is still limited. Here, we performed idealized experiments with a pan-Antarctic regional ice-shelf cavity-resolving ocean—sea-ice model for different phases of the Southern Annular Mode. We show that positive phases lead to increased upwelling and subsurface ocean temperature and salinity close to ice shelves, while the opposite occurs for negative phases. A one-standard-deviation increase of the Southern Annular Mode leads to a net basal mass loss of 40 Gt yr−1, with strong regional contrasts: increased ice-shelf basal melt in the Bellingshausen and Western Pacific sectors and the opposite response in the Amundsen sector. Estimates of 1000–1200 and 2090–2100 ice-shelf basal melt changes due to the Southern Annular Mode are −86.6 Gt yr−1 and 55.0 to 164.9 Gt yr−1, respectively, compared to the present. |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Verfaillie, Deborah Pelletier, Charles Goosse, Hugues Jourdain, Nicolas C. Bull, Christopher Y. S. Dalaiden, Quentin Favier, Vincent Fichefet, Thierry Wille, Jonathan D. |
author_facet |
Verfaillie, Deborah Pelletier, Charles Goosse, Hugues Jourdain, Nicolas C. Bull, Christopher Y. S. Dalaiden, Quentin Favier, Vincent Fichefet, Thierry Wille, Jonathan D. |
author_sort |
Verfaillie, Deborah |
title |
The circum-Antarctic ice-shelves respond to a more positive Southern Annular Mode with regionally varied melting |
title_short |
The circum-Antarctic ice-shelves respond to a more positive Southern Annular Mode with regionally varied melting |
title_full |
The circum-Antarctic ice-shelves respond to a more positive Southern Annular Mode with regionally varied melting |
title_fullStr |
The circum-Antarctic ice-shelves respond to a more positive Southern Annular Mode with regionally varied melting |
title_full_unstemmed |
The circum-Antarctic ice-shelves respond to a more positive Southern Annular Mode with regionally varied melting |
title_sort |
circum-antarctic ice-shelves respond to a more positive southern annular mode with regionally varied melting |
publisher |
Springer Science and Business Media LLC |
publishDate |
2022 |
url |
http://hdl.handle.net/2078.1/262431 https://doi.org/10.1038/s43247-022-00458-x |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic Ice Shelf Ice Shelves Sea ice |
genre_facet |
Antarc* Antarctic Ice Shelf Ice Shelves Sea ice |
op_source |
Communications Earth & Environment, Vol. 3, no.1, p. 12 (2022) |
op_relation |
boreal:262431 http://hdl.handle.net/2078.1/262431 doi:10.1038/s43247-022-00458-x urn:EISSN:2662-4435 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s43247-022-00458-x |
container_title |
Communications Earth & Environment |
container_volume |
3 |
container_issue |
1 |
_version_ |
1798842848516243456 |