Climate impacts of a weakened Atlantic Meridional Overturning Circulation in a warming climate
While the Atlantic Meridional Overturning Circulation (AMOC) is projected to slow down under anthropogenic warming, the exact role of the AMOC in future climate change has not been fully quantified. Here, we present a method to stabilize the AMOC intensity in anthropogenic warming experiments by rem...
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ftpubmed:oai:pubmedcentral.nih.gov:7319730 2023-05-15T14:55:05+02:00 Climate impacts of a weakened Atlantic Meridional Overturning Circulation in a warming climate Liu, Wei Fedorov, Alexey V. Xie, Shang-Ping Hu, Shineng 2020-06-26 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319730/ http://www.ncbi.nlm.nih.gov/pubmed/32637596 https://doi.org/10.1126/sciadv.aaz4876 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319730/ http://www.ncbi.nlm.nih.gov/pubmed/32637596 http://dx.doi.org/10.1126/sciadv.aaz4876 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). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://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.aaz4876 2020-07-12T00:20:42Z While the Atlantic Meridional Overturning Circulation (AMOC) is projected to slow down under anthropogenic warming, the exact role of the AMOC in future climate change has not been fully quantified. Here, we present a method to stabilize the AMOC intensity in anthropogenic warming experiments by removing fresh water from the subpolar North Atlantic. This method enables us to isolate the AMOC climatic impacts in experiments with a full-physics climate model. Our results show that a weakened AMOC can explain ocean cooling south of Greenland that resembles the North Atlantic warming hole and a reduced Arctic sea ice loss in all seasons with a delay of about 6 years in the emergence of an ice-free Arctic in boreal summer. In the troposphere, a weakened AMOC causes an anomalous cooling band stretching from the lower levels in high latitudes to the upper levels in the tropics and displaces the Northern Hemisphere midlatitude jets poleward. Text Arctic Climate change Greenland North Atlantic Sea ice PubMed Central (PMC) Arctic Greenland Science Advances 6 26 eaaz4876 |
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Research Articles Liu, Wei Fedorov, Alexey V. Xie, Shang-Ping Hu, Shineng Climate impacts of a weakened Atlantic Meridional Overturning Circulation in a warming climate |
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Research Articles |
description |
While the Atlantic Meridional Overturning Circulation (AMOC) is projected to slow down under anthropogenic warming, the exact role of the AMOC in future climate change has not been fully quantified. Here, we present a method to stabilize the AMOC intensity in anthropogenic warming experiments by removing fresh water from the subpolar North Atlantic. This method enables us to isolate the AMOC climatic impacts in experiments with a full-physics climate model. Our results show that a weakened AMOC can explain ocean cooling south of Greenland that resembles the North Atlantic warming hole and a reduced Arctic sea ice loss in all seasons with a delay of about 6 years in the emergence of an ice-free Arctic in boreal summer. In the troposphere, a weakened AMOC causes an anomalous cooling band stretching from the lower levels in high latitudes to the upper levels in the tropics and displaces the Northern Hemisphere midlatitude jets poleward. |
format |
Text |
author |
Liu, Wei Fedorov, Alexey V. Xie, Shang-Ping Hu, Shineng |
author_facet |
Liu, Wei Fedorov, Alexey V. Xie, Shang-Ping Hu, Shineng |
author_sort |
Liu, Wei |
title |
Climate impacts of a weakened Atlantic Meridional Overturning Circulation in a warming climate |
title_short |
Climate impacts of a weakened Atlantic Meridional Overturning Circulation in a warming climate |
title_full |
Climate impacts of a weakened Atlantic Meridional Overturning Circulation in a warming climate |
title_fullStr |
Climate impacts of a weakened Atlantic Meridional Overturning Circulation in a warming climate |
title_full_unstemmed |
Climate impacts of a weakened Atlantic Meridional Overturning Circulation in a warming climate |
title_sort |
climate impacts of a weakened atlantic meridional overturning circulation in a warming climate |
publisher |
American Association for the Advancement of Science |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319730/ http://www.ncbi.nlm.nih.gov/pubmed/32637596 https://doi.org/10.1126/sciadv.aaz4876 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Climate change Greenland North Atlantic Sea ice |
genre_facet |
Arctic Climate change Greenland North Atlantic Sea ice |
op_source |
Sci Adv |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319730/ http://www.ncbi.nlm.nih.gov/pubmed/32637596 http://dx.doi.org/10.1126/sciadv.aaz4876 |
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). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://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 |
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https://doi.org/10.1126/sciadv.aaz4876 |
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Science Advances |
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6 |
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26 |
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