Future climate response to Antarctic Ice Sheet melt caused by anthropogenic warming
Meltwater and ice discharge from a retreating Antarctic Ice Sheet could have important impacts on future global climate. Here, we report on multi-century (present–2250) climate simulations performed using a coupled numerical model integrated under future greenhouse-gas emission scenarios IPCC RCP4.5...
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ftpubmed:oai:pubmedcentral.nih.gov:7531873 2023-05-15T13:55:57+02:00 Future climate response to Antarctic Ice Sheet melt caused by anthropogenic warming Sadai, Shaina Condron, Alan DeConto, Robert Pollard, David 2020-09-23 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7531873/ http://www.ncbi.nlm.nih.gov/pubmed/32967838 https://doi.org/10.1126/sciadv.aaz1169 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7531873/ http://www.ncbi.nlm.nih.gov/pubmed/32967838 http://dx.doi.org/10.1126/sciadv.aaz1169 Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. CC-BY-NC Sci Adv Research Articles Text 2020 ftpubmed https://doi.org/10.1126/sciadv.aaz1169 2020-10-18T00:23:32Z Meltwater and ice discharge from a retreating Antarctic Ice Sheet could have important impacts on future global climate. Here, we report on multi-century (present–2250) climate simulations performed using a coupled numerical model integrated under future greenhouse-gas emission scenarios IPCC RCP4.5 and RCP8.5, with meltwater and ice discharge provided by a dynamic-thermodynamic ice sheet model. Accounting for Antarctic discharge raises subsurface ocean temperatures by >1°C at the ice margin relative to simulations ignoring discharge. In contrast, expanded sea ice and 2° to 10°C cooler surface air and surface ocean temperatures in the Southern Ocean delay the increase of projected global mean anthropogenic warming through 2250. In addition, the projected loss of Arctic winter sea ice and weakening of the Atlantic Meridional Overturning Circulation are delayed by several decades. Our results demonstrate a need to accurately account for meltwater input from ice sheets in order to make confident climate predictions. Text Antarc* Antarctic Arctic Ice Sheet Sea ice Southern Ocean PubMed Central (PMC) Antarctic Arctic Southern Ocean Science Advances 6 39 eaaz1169 |
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Research Articles Sadai, Shaina Condron, Alan DeConto, Robert Pollard, David Future climate response to Antarctic Ice Sheet melt caused by anthropogenic warming |
topic_facet |
Research Articles |
description |
Meltwater and ice discharge from a retreating Antarctic Ice Sheet could have important impacts on future global climate. Here, we report on multi-century (present–2250) climate simulations performed using a coupled numerical model integrated under future greenhouse-gas emission scenarios IPCC RCP4.5 and RCP8.5, with meltwater and ice discharge provided by a dynamic-thermodynamic ice sheet model. Accounting for Antarctic discharge raises subsurface ocean temperatures by >1°C at the ice margin relative to simulations ignoring discharge. In contrast, expanded sea ice and 2° to 10°C cooler surface air and surface ocean temperatures in the Southern Ocean delay the increase of projected global mean anthropogenic warming through 2250. In addition, the projected loss of Arctic winter sea ice and weakening of the Atlantic Meridional Overturning Circulation are delayed by several decades. Our results demonstrate a need to accurately account for meltwater input from ice sheets in order to make confident climate predictions. |
format |
Text |
author |
Sadai, Shaina Condron, Alan DeConto, Robert Pollard, David |
author_facet |
Sadai, Shaina Condron, Alan DeConto, Robert Pollard, David |
author_sort |
Sadai, Shaina |
title |
Future climate response to Antarctic Ice Sheet melt caused by anthropogenic warming |
title_short |
Future climate response to Antarctic Ice Sheet melt caused by anthropogenic warming |
title_full |
Future climate response to Antarctic Ice Sheet melt caused by anthropogenic warming |
title_fullStr |
Future climate response to Antarctic Ice Sheet melt caused by anthropogenic warming |
title_full_unstemmed |
Future climate response to Antarctic Ice Sheet melt caused by anthropogenic warming |
title_sort |
future climate response to antarctic ice sheet melt caused by anthropogenic warming |
publisher |
American Association for the Advancement of Science |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7531873/ http://www.ncbi.nlm.nih.gov/pubmed/32967838 https://doi.org/10.1126/sciadv.aaz1169 |
geographic |
Antarctic Arctic Southern Ocean |
geographic_facet |
Antarctic Arctic Southern Ocean |
genre |
Antarc* Antarctic Arctic Ice Sheet Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Arctic Ice Sheet Sea ice Southern Ocean |
op_source |
Sci Adv |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7531873/ http://www.ncbi.nlm.nih.gov/pubmed/32967838 http://dx.doi.org/10.1126/sciadv.aaz1169 |
op_rights |
Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
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CC-BY-NC |
op_doi |
https://doi.org/10.1126/sciadv.aaz1169 |
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Science Advances |
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6 |
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39 |
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