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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Published in:Science Advances
Main Authors: Liu, Wei, Fedorov, Alexey V., Xie, Shang-Ping, Hu, Shineng
Format: Text
Language:English
Published: American Association for the Advancement of Science 2020
Subjects:
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7319730/
http://www.ncbi.nlm.nih.gov/pubmed/32637596
https://doi.org/10.1126/sciadv.aaz4876
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spelling 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
institution Open Polar
collection PubMed Central (PMC)
op_collection_id ftpubmed
language English
topic Research Articles
spellingShingle 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
topic_facet 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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