Latitudinal shift of the Atlantic Meridional Overturning Circulation source regions under a warming climate
International audience The strength of the Atlantic Meridional Overturning Circulation, a key indicator of the climate state, is maintained by the subduction of dense water that feeds the deep southwards branch. At present, this subduction occurs almost entirely in the subpolar region, in the Labrad...
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ftccsdartic:oai:HAL:insu-03683064v1 2023-12-17T10:23:41+01:00 Latitudinal shift of the Atlantic Meridional Overturning Circulation source regions under a warming climate Lique, Camille Thomas, Matthew D. Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2018 https://insu.hal.science/insu-03683064 https://doi.org/10.1038/s41558-018-0316-5 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1038/s41558-018-0316-5 insu-03683064 https://insu.hal.science/insu-03683064 BIBCODE: 2018NatCC.8.1013L doi:10.1038/s41558-018-0316-5 Nature Climate Change https://insu.hal.science/insu-03683064 Nature Climate Change, 2018, 8, pp.1013-1020. ⟨10.1038/s41558-018-0316-5⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2018 ftccsdartic https://doi.org/10.1038/s41558-018-0316-5 2023-11-19T00:10:02Z International audience The strength of the Atlantic Meridional Overturning Circulation, a key indicator of the climate state, is maintained by the subduction of dense water that feeds the deep southwards branch. At present, this subduction occurs almost entirely in the subpolar region, in the Labrador, Irminger and Nordic seas; however, whether this will continue under climate change is unknown. Here we use a quantitative Lagrangian diagnostic applied to climate model output to show that, in response to warming, the main source regions of this mixed-layer subduction shift northwards to the Arctic Basin and southwards to the subtropical gyre. These shifts are explained by changes in background stratification, mixed-layer depth and ocean circulation, highlighting the need to consider the full three-dimensionality of the circulation and its changes to accurately predict the future climate state. Article in Journal/Newspaper Arctic Basin Arctic Climate change Nordic Seas Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Nature Climate Change 8 11 1013 1020 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
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[SDU]Sciences of the Universe [physics] Lique, Camille Thomas, Matthew D. Latitudinal shift of the Atlantic Meridional Overturning Circulation source regions under a warming climate |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience The strength of the Atlantic Meridional Overturning Circulation, a key indicator of the climate state, is maintained by the subduction of dense water that feeds the deep southwards branch. At present, this subduction occurs almost entirely in the subpolar region, in the Labrador, Irminger and Nordic seas; however, whether this will continue under climate change is unknown. Here we use a quantitative Lagrangian diagnostic applied to climate model output to show that, in response to warming, the main source regions of this mixed-layer subduction shift northwards to the Arctic Basin and southwards to the subtropical gyre. These shifts are explained by changes in background stratification, mixed-layer depth and ocean circulation, highlighting the need to consider the full three-dimensionality of the circulation and its changes to accurately predict the future climate state. |
author2 |
Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Lique, Camille Thomas, Matthew D. |
author_facet |
Lique, Camille Thomas, Matthew D. |
author_sort |
Lique, Camille |
title |
Latitudinal shift of the Atlantic Meridional Overturning Circulation source regions under a warming climate |
title_short |
Latitudinal shift of the Atlantic Meridional Overturning Circulation source regions under a warming climate |
title_full |
Latitudinal shift of the Atlantic Meridional Overturning Circulation source regions under a warming climate |
title_fullStr |
Latitudinal shift of the Atlantic Meridional Overturning Circulation source regions under a warming climate |
title_full_unstemmed |
Latitudinal shift of the Atlantic Meridional Overturning Circulation source regions under a warming climate |
title_sort |
latitudinal shift of the atlantic meridional overturning circulation source regions under a warming climate |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://insu.hal.science/insu-03683064 https://doi.org/10.1038/s41558-018-0316-5 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Basin Arctic Climate change Nordic Seas |
genre_facet |
Arctic Basin Arctic Climate change Nordic Seas |
op_source |
Nature Climate Change https://insu.hal.science/insu-03683064 Nature Climate Change, 2018, 8, pp.1013-1020. ⟨10.1038/s41558-018-0316-5⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41558-018-0316-5 insu-03683064 https://insu.hal.science/insu-03683064 BIBCODE: 2018NatCC.8.1013L doi:10.1038/s41558-018-0316-5 |
op_doi |
https://doi.org/10.1038/s41558-018-0316-5 |
container_title |
Nature Climate Change |
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8 |
container_issue |
11 |
container_start_page |
1013 |
op_container_end_page |
1020 |
_version_ |
1785559653257576448 |