Indian Ocean warming as a driver of the North Atlantic warming hole
International audience Over the past century, the subpolar North Atlantic experienced slight cooling or suppressed warming, relative to the background positive temperature trends, often dubbed the North Atlantic warming hole (NAWH). The causes of the NAWH remain under debate. Here we conduct coupled...
Published in: | Nature Communications |
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Main Authors: | , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Online Access: | https://hal.sorbonne-universite.fr/hal-02968216 https://hal.sorbonne-universite.fr/hal-02968216/document https://hal.sorbonne-universite.fr/hal-02968216/file/s41467-020-18522-5.pdf https://doi.org/10.1038/s41467-020-18522-5 |
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ftunivnantes:oai:HAL:hal-02968216v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Atmospheric science Climate sciences Ocean sciences [SDV.EE]Life Sciences [q-bio]/Ecology environment |
spellingShingle |
Atmospheric science Climate sciences Ocean sciences [SDV.EE]Life Sciences [q-bio]/Ecology environment Hu, Shineng Fedorov, Alexey V. Indian Ocean warming as a driver of the North Atlantic warming hole |
topic_facet |
Atmospheric science Climate sciences Ocean sciences [SDV.EE]Life Sciences [q-bio]/Ecology environment |
description |
International audience Over the past century, the subpolar North Atlantic experienced slight cooling or suppressed warming, relative to the background positive temperature trends, often dubbed the North Atlantic warming hole (NAWH). The causes of the NAWH remain under debate. Here we conduct coupled ocean-atmosphere simulations to demonstrate that enhanced Indian Ocean warming, another salient feature of global warming, could increase local rainfall and through teleconnections strengthen surface westerly winds south of Greenland, cooling the subpolar North Atlantic. In decades to follow however, this cooling effect would gradually vanish as the Indian Ocean warming acts to strengthen the Atlantic meridional overturning circulation (AMOC). We argue that the historical NAWH can potentially be explained by such atmospheric mechanisms reliant on surface wind changes, while oceanic mechanisms related to AMOC changes become more important on longer timescales. Thus, explaining the North Atlantic temperature trends and particularly the NAWH requires considering both atmospheric and oceanic mechanisms. |
author2 |
Columbia University New York Duke University Durham Yale University New Haven 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) ANR-18-MPGA-0001,ARCHANGE,Changement climatique et Arctique et circulation océanique globale(2018) |
format |
Article in Journal/Newspaper |
author |
Hu, Shineng Fedorov, Alexey V. |
author_facet |
Hu, Shineng Fedorov, Alexey V. |
author_sort |
Hu, Shineng |
title |
Indian Ocean warming as a driver of the North Atlantic warming hole |
title_short |
Indian Ocean warming as a driver of the North Atlantic warming hole |
title_full |
Indian Ocean warming as a driver of the North Atlantic warming hole |
title_fullStr |
Indian Ocean warming as a driver of the North Atlantic warming hole |
title_full_unstemmed |
Indian Ocean warming as a driver of the North Atlantic warming hole |
title_sort |
indian ocean warming as a driver of the north atlantic warming hole |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.sorbonne-universite.fr/hal-02968216 https://hal.sorbonne-universite.fr/hal-02968216/document https://hal.sorbonne-universite.fr/hal-02968216/file/s41467-020-18522-5.pdf https://doi.org/10.1038/s41467-020-18522-5 |
geographic |
Greenland Indian |
geographic_facet |
Greenland Indian |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_source |
ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.sorbonne-universite.fr/hal-02968216 Nature Communications, 2020, 11 (1), ⟨10.1038/s41467-020-18522-5⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-020-18522-5 hal-02968216 https://hal.sorbonne-universite.fr/hal-02968216 https://hal.sorbonne-universite.fr/hal-02968216/document https://hal.sorbonne-universite.fr/hal-02968216/file/s41467-020-18522-5.pdf doi:10.1038/s41467-020-18522-5 WOS: 000573749000013 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41467-020-18522-5 |
container_title |
Nature Communications |
container_volume |
11 |
container_issue |
1 |
_version_ |
1766018703144517632 |
spelling |
ftunivnantes:oai:HAL:hal-02968216v1 2023-05-15T16:29:01+02:00 Indian Ocean warming as a driver of the North Atlantic warming hole Hu, Shineng Fedorov, Alexey V. Columbia University New York Duke University Durham Yale University New Haven 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) ANR-18-MPGA-0001,ARCHANGE,Changement climatique et Arctique et circulation océanique globale(2018) 2020-12 https://hal.sorbonne-universite.fr/hal-02968216 https://hal.sorbonne-universite.fr/hal-02968216/document https://hal.sorbonne-universite.fr/hal-02968216/file/s41467-020-18522-5.pdf https://doi.org/10.1038/s41467-020-18522-5 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-020-18522-5 hal-02968216 https://hal.sorbonne-universite.fr/hal-02968216 https://hal.sorbonne-universite.fr/hal-02968216/document https://hal.sorbonne-universite.fr/hal-02968216/file/s41467-020-18522-5.pdf doi:10.1038/s41467-020-18522-5 WOS: 000573749000013 info:eu-repo/semantics/OpenAccess ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.sorbonne-universite.fr/hal-02968216 Nature Communications, 2020, 11 (1), ⟨10.1038/s41467-020-18522-5⟩ Atmospheric science Climate sciences Ocean sciences [SDV.EE]Life Sciences [q-bio]/Ecology environment info:eu-repo/semantics/article Journal articles 2020 ftunivnantes https://doi.org/10.1038/s41467-020-18522-5 2023-01-18T00:34:24Z International audience Over the past century, the subpolar North Atlantic experienced slight cooling or suppressed warming, relative to the background positive temperature trends, often dubbed the North Atlantic warming hole (NAWH). The causes of the NAWH remain under debate. Here we conduct coupled ocean-atmosphere simulations to demonstrate that enhanced Indian Ocean warming, another salient feature of global warming, could increase local rainfall and through teleconnections strengthen surface westerly winds south of Greenland, cooling the subpolar North Atlantic. In decades to follow however, this cooling effect would gradually vanish as the Indian Ocean warming acts to strengthen the Atlantic meridional overturning circulation (AMOC). We argue that the historical NAWH can potentially be explained by such atmospheric mechanisms reliant on surface wind changes, while oceanic mechanisms related to AMOC changes become more important on longer timescales. Thus, explaining the North Atlantic temperature trends and particularly the NAWH requires considering both atmospheric and oceanic mechanisms. Article in Journal/Newspaper Greenland North Atlantic Université de Nantes: HAL-UNIV-NANTES Greenland Indian Nature Communications 11 1 |