Antarctic ice-sheet melting provides negative feedbacks on future climate warming
We show by using a three-dimensional climate model, which includes a comprehensive representation of polar ice sheets, that on centennial to millennial time scales Antarctic Ice Sheet (AIS) can melt and moderate warming in the Southern Hemisphere, by up to 10 degrees C regionally, in a 4 x CO2 scena...
Published in: | Geophysical Research Letters |
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Language: | English |
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Amer Geophysical Union
2008
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Online Access: | http://hdl.handle.net/2078.1/36376 https://doi.org/10.1029/2008GL034410 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:36376 2024-05-12T07:56:32+00:00 Antarctic ice-sheet melting provides negative feedbacks on future climate warming Swingedouw, Didier Fichefet, Thierry Huybrechts, P. Goosse, Hugues Driesschaert, Emmanuelle Loutre, Marie-France UCL - SC/PHYS - Département de physique UCL - SST/ELI/ELIC - Earth & Climate 2008 http://hdl.handle.net/2078.1/36376 https://doi.org/10.1029/2008GL034410 eng eng Amer Geophysical Union boreal:36376 http://hdl.handle.net/2078.1/36376 doi:10.1029/2008GL034410 urn:ISSN:0094-8276 urn:EISSN:1944-8007 Geophysical Research Letters, Vol. 35, no. 17 (2008) info:eu-repo/semantics/article 2008 ftunistlouisbrus https://doi.org/10.1029/2008GL034410 2024-04-18T18:15:50Z We show by using a three-dimensional climate model, which includes a comprehensive representation of polar ice sheets, that on centennial to millennial time scales Antarctic Ice Sheet (AIS) can melt and moderate warming in the Southern Hemisphere, by up to 10 degrees C regionally, in a 4 x CO2 scenario. This behaviour stems from the formation of a cold halocline in the Southern Ocean, which limits sea-ice cover retreat under global warming and increases surface albedo, reducing local surface warming. Furthermore, we show that AIS melting, by decreasing Antarctic Bottom Water formation, restrains the weakening of the Atlantic meridional overturning circulation, which is a new illustration of the effect of the bi-polar oceanic seesaw. Consequently, it appears that AIS melting strongly interacts with climate and ocean circulation globally. It is therefore necessary to account for this coupling in future climate and sea-level rise scenarios. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Sea ice Southern Ocean DIAL@USL-B (Université Saint-Louis, Bruxelles) Antarctic Southern Ocean Geophysical Research Letters 35 17 |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
description |
We show by using a three-dimensional climate model, which includes a comprehensive representation of polar ice sheets, that on centennial to millennial time scales Antarctic Ice Sheet (AIS) can melt and moderate warming in the Southern Hemisphere, by up to 10 degrees C regionally, in a 4 x CO2 scenario. This behaviour stems from the formation of a cold halocline in the Southern Ocean, which limits sea-ice cover retreat under global warming and increases surface albedo, reducing local surface warming. Furthermore, we show that AIS melting, by decreasing Antarctic Bottom Water formation, restrains the weakening of the Atlantic meridional overturning circulation, which is a new illustration of the effect of the bi-polar oceanic seesaw. Consequently, it appears that AIS melting strongly interacts with climate and ocean circulation globally. It is therefore necessary to account for this coupling in future climate and sea-level rise scenarios. |
author2 |
UCL - SC/PHYS - Département de physique UCL - SST/ELI/ELIC - Earth & Climate |
format |
Article in Journal/Newspaper |
author |
Swingedouw, Didier Fichefet, Thierry Huybrechts, P. Goosse, Hugues Driesschaert, Emmanuelle Loutre, Marie-France |
spellingShingle |
Swingedouw, Didier Fichefet, Thierry Huybrechts, P. Goosse, Hugues Driesschaert, Emmanuelle Loutre, Marie-France Antarctic ice-sheet melting provides negative feedbacks on future climate warming |
author_facet |
Swingedouw, Didier Fichefet, Thierry Huybrechts, P. Goosse, Hugues Driesschaert, Emmanuelle Loutre, Marie-France |
author_sort |
Swingedouw, Didier |
title |
Antarctic ice-sheet melting provides negative feedbacks on future climate warming |
title_short |
Antarctic ice-sheet melting provides negative feedbacks on future climate warming |
title_full |
Antarctic ice-sheet melting provides negative feedbacks on future climate warming |
title_fullStr |
Antarctic ice-sheet melting provides negative feedbacks on future climate warming |
title_full_unstemmed |
Antarctic ice-sheet melting provides negative feedbacks on future climate warming |
title_sort |
antarctic ice-sheet melting provides negative feedbacks on future climate warming |
publisher |
Amer Geophysical Union |
publishDate |
2008 |
url |
http://hdl.handle.net/2078.1/36376 https://doi.org/10.1029/2008GL034410 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Ice Sheet Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet Sea ice Southern Ocean |
op_source |
Geophysical Research Letters, Vol. 35, no. 17 (2008) |
op_relation |
boreal:36376 http://hdl.handle.net/2078.1/36376 doi:10.1029/2008GL034410 urn:ISSN:0094-8276 urn:EISSN:1944-8007 |
op_doi |
https://doi.org/10.1029/2008GL034410 |
container_title |
Geophysical Research Letters |
container_volume |
35 |
container_issue |
17 |
_version_ |
1798836635833466880 |