Slowdown and Recovery of the Atlantic Meridional Overturning Circulation and a Persistent North Atlantic Warming Hole Induced by Arctic Sea Ice Decline
International audience We investigate the impact of Arctic sea ice loss on the Atlantic meridional overturning circulation (AMOC) and North Atlantic climate in a coupled general circulation model (IPSL-CM5A2) perturbation experiment, wherein Arctic sea ice is reduced until reaching an equilibrium of...
Published in: | Geophysical Research Letters |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2022
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03778097 https://hal-insu.archives-ouvertes.fr/insu-03778097/document https://hal-insu.archives-ouvertes.fr/insu-03778097/file/Geophysical%20Research%20Letters%20-%202022%20-%20Ferster%20-%20Slowdown%20and%20Recovery%20of%20the%20Atlantic%20Meridional%20Overturning%20Circulation.pdf https://doi.org/10.1029/2022GL097967 |
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ftunivnantes:oai:HAL:insu-03778097v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Arctic sea ice AMOC subpolar North Atlantic NAO [SDU]Sciences of the Universe [physics] |
spellingShingle |
Arctic sea ice AMOC subpolar North Atlantic NAO [SDU]Sciences of the Universe [physics] Ferster, Brady Fedorov, Alexey V. Mignot, Juliette Guilyardi, Éric Simon, Amélie Slowdown and Recovery of the Atlantic Meridional Overturning Circulation and a Persistent North Atlantic Warming Hole Induced by Arctic Sea Ice Decline |
topic_facet |
Arctic sea ice AMOC subpolar North Atlantic NAO [SDU]Sciences of the Universe [physics] |
description |
International audience We investigate the impact of Arctic sea ice loss on the Atlantic meridional overturning circulation (AMOC) and North Atlantic climate in a coupled general circulation model (IPSL-CM5A2) perturbation experiment, wherein Arctic sea ice is reduced until reaching an equilibrium of an ice-free summer. After several decades we observe AMOC weakening caused by reduced dense water formation in the Iceland basin due to the warming of surface waters, and later compensated by intensification of dense water formation in the Western Subpolar North Atlantic. Consequently, AMOC slightly weakens in deep, dense waters but recovers through shallower, less dense waters overturning. In parallel, wind-driven intensification and southeastward expansion of the subpolar gyre cause a depth-extended cold anomaly ∼2°C around 50°N that resembles the North Atlantic "warming hole." We conclude that compensating dense water formations drive AMOC changes following sea ice retreat and that a warming hole can develop independently of the AMOC modulation. |
author2 |
Océan et variabilité du climat (VARCLIM) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Department of Earth and Planetary Sciences New Haven Yale University New Haven ANR-18-MPGA-0001,ARCHANGE,Changement climatique et Arctique et circulation océanique globale(2018) European Project: 727852,Blue-Action(2016) European Project: 776613,Fighting and adapting to climate change,H2020-EU.3.5.1,EUCP(2017) |
format |
Article in Journal/Newspaper |
author |
Ferster, Brady Fedorov, Alexey V. Mignot, Juliette Guilyardi, Éric Simon, Amélie |
author_facet |
Ferster, Brady Fedorov, Alexey V. Mignot, Juliette Guilyardi, Éric Simon, Amélie |
author_sort |
Ferster, Brady |
title |
Slowdown and Recovery of the Atlantic Meridional Overturning Circulation and a Persistent North Atlantic Warming Hole Induced by Arctic Sea Ice Decline |
title_short |
Slowdown and Recovery of the Atlantic Meridional Overturning Circulation and a Persistent North Atlantic Warming Hole Induced by Arctic Sea Ice Decline |
title_full |
Slowdown and Recovery of the Atlantic Meridional Overturning Circulation and a Persistent North Atlantic Warming Hole Induced by Arctic Sea Ice Decline |
title_fullStr |
Slowdown and Recovery of the Atlantic Meridional Overturning Circulation and a Persistent North Atlantic Warming Hole Induced by Arctic Sea Ice Decline |
title_full_unstemmed |
Slowdown and Recovery of the Atlantic Meridional Overturning Circulation and a Persistent North Atlantic Warming Hole Induced by Arctic Sea Ice Decline |
title_sort |
slowdown and recovery of the atlantic meridional overturning circulation and a persistent north atlantic warming hole induced by arctic sea ice decline |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03778097 https://hal-insu.archives-ouvertes.fr/insu-03778097/document https://hal-insu.archives-ouvertes.fr/insu-03778097/file/Geophysical%20Research%20Letters%20-%202022%20-%20Ferster%20-%20Slowdown%20and%20Recovery%20of%20the%20Atlantic%20Meridional%20Overturning%20Circulation.pdf https://doi.org/10.1029/2022GL097967 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Iceland North Atlantic Sea ice |
genre_facet |
Arctic Arctic Iceland North Atlantic Sea ice |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal-insu.archives-ouvertes.fr/insu-03778097 Geophysical Research Letters, 2022, 49 (16), pp.e2022GL097967. ⟨10.1029/2022GL097967⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2022GL097967 info:eu-repo/grantAgreement//727852/EU/Blue-Action: Arctic impact on weather and climat/Blue-Action info:eu-repo/grantAgreement//776613/EU/European Climate Prediction system/EUCP insu-03778097 https://hal-insu.archives-ouvertes.fr/insu-03778097 https://hal-insu.archives-ouvertes.fr/insu-03778097/document https://hal-insu.archives-ouvertes.fr/insu-03778097/file/Geophysical%20Research%20Letters%20-%202022%20-%20Ferster%20-%20Slowdown%20and%20Recovery%20of%20the%20Atlantic%20Meridional%20Overturning%20Circulation.pdf BIBCODE: 2022GeoRL.4997967F doi:10.1029/2022GL097967 IRD: fdi:010086025 WOS: 000846928600001 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2022GL097967 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
container_issue |
16 |
_version_ |
1766302095157231616 |
spelling |
ftunivnantes:oai:HAL:insu-03778097v1 2023-05-15T14:27:59+02:00 Slowdown and Recovery of the Atlantic Meridional Overturning Circulation and a Persistent North Atlantic Warming Hole Induced by Arctic Sea Ice Decline Ferster, Brady Fedorov, Alexey V. Mignot, Juliette Guilyardi, Éric Simon, Amélie Océan et variabilité du climat (VARCLIM) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Department of Earth and Planetary Sciences New Haven Yale University New Haven ANR-18-MPGA-0001,ARCHANGE,Changement climatique et Arctique et circulation océanique globale(2018) European Project: 727852,Blue-Action(2016) European Project: 776613,Fighting and adapting to climate change,H2020-EU.3.5.1,EUCP(2017) 2022 https://hal-insu.archives-ouvertes.fr/insu-03778097 https://hal-insu.archives-ouvertes.fr/insu-03778097/document https://hal-insu.archives-ouvertes.fr/insu-03778097/file/Geophysical%20Research%20Letters%20-%202022%20-%20Ferster%20-%20Slowdown%20and%20Recovery%20of%20the%20Atlantic%20Meridional%20Overturning%20Circulation.pdf https://doi.org/10.1029/2022GL097967 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2022GL097967 info:eu-repo/grantAgreement//727852/EU/Blue-Action: Arctic impact on weather and climat/Blue-Action info:eu-repo/grantAgreement//776613/EU/European Climate Prediction system/EUCP insu-03778097 https://hal-insu.archives-ouvertes.fr/insu-03778097 https://hal-insu.archives-ouvertes.fr/insu-03778097/document https://hal-insu.archives-ouvertes.fr/insu-03778097/file/Geophysical%20Research%20Letters%20-%202022%20-%20Ferster%20-%20Slowdown%20and%20Recovery%20of%20the%20Atlantic%20Meridional%20Overturning%20Circulation.pdf BIBCODE: 2022GeoRL.4997967F doi:10.1029/2022GL097967 IRD: fdi:010086025 WOS: 000846928600001 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal-insu.archives-ouvertes.fr/insu-03778097 Geophysical Research Letters, 2022, 49 (16), pp.e2022GL097967. ⟨10.1029/2022GL097967⟩ Arctic sea ice AMOC subpolar North Atlantic NAO [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.1029/2022GL097967 2023-02-08T01:34:29Z International audience We investigate the impact of Arctic sea ice loss on the Atlantic meridional overturning circulation (AMOC) and North Atlantic climate in a coupled general circulation model (IPSL-CM5A2) perturbation experiment, wherein Arctic sea ice is reduced until reaching an equilibrium of an ice-free summer. After several decades we observe AMOC weakening caused by reduced dense water formation in the Iceland basin due to the warming of surface waters, and later compensated by intensification of dense water formation in the Western Subpolar North Atlantic. Consequently, AMOC slightly weakens in deep, dense waters but recovers through shallower, less dense waters overturning. In parallel, wind-driven intensification and southeastward expansion of the subpolar gyre cause a depth-extended cold anomaly ∼2°C around 50°N that resembles the North Atlantic "warming hole." We conclude that compensating dense water formations drive AMOC changes following sea ice retreat and that a warming hole can develop independently of the AMOC modulation. Article in Journal/Newspaper Arctic Arctic Iceland North Atlantic Sea ice Université de Nantes: HAL-UNIV-NANTES Arctic Geophysical Research Letters 49 16 |