The evolution of the North Atlantic Meridional Overturning Circulation since 1980
International audience The Atlantic Meridional Overturning Circulation (AMOC) is a key component of the climate through its transport of heat in the North Atlantic Ocean. Decadal changes in the AMOC, whether through internal variability or anthropogenically forced weakening, therefore have wide-rang...
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ftunivbrest:oai:HAL:insu-03683295v1 2024-04-21T08:07:19+00:00 The evolution of the North Atlantic Meridional Overturning Circulation since 1980 Jackson, Laura C. Biastoch, Arne Buckley, Martha W. Desbruyères, Damien G. Frajka-Williams, Eleanor Moat, Ben Robson, Jon 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) 2022 https://insu.hal.science/insu-03683295 https://doi.org/10.1038/s43017-022-00263-2 en eng HAL CCSD Nature info:eu-repo/semantics/altIdentifier/doi/10.1038/s43017-022-00263-2 insu-03683295 https://insu.hal.science/insu-03683295 BIBCODE: 2022NRvEE.3.241J doi:10.1038/s43017-022-00263-2 EISSN: 2662-138X Nature Reviews Earth & Environment https://insu.hal.science/insu-03683295 Nature Reviews Earth & Environment, 2022, 3, pp.241-254. ⟨10.1038/s43017-022-00263-2⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2022 ftunivbrest https://doi.org/10.1038/s43017-022-00263-2 2024-03-28T00:47:52Z International audience The Atlantic Meridional Overturning Circulation (AMOC) is a key component of the climate through its transport of heat in the North Atlantic Ocean. Decadal changes in the AMOC, whether through internal variability or anthropogenically forced weakening, therefore have wide-ranging impacts. In this Review, we synthesize the understanding of contemporary decadal variability in the AMOC, bringing together evidence from observations, ocean reanalyses, forced models and AMOC proxies. Since 1980, there is evidence for periods of strengthening and weakening, although the magnitudes of change (5-25%) are uncertain. In the subpolar North Atlantic, the AMOC strengthened until the mid-1990s and then weakened until the early 2010s, with some evidence of a strengthening thereafter; these changes are probably linked to buoyancy forcing related to the North Atlantic Oscillation. In the subtropics, there is some evidence of the AMOC strengthening from 2001 to 2005 and strong evidence of a weakening from 2005 to 2014. Such large interannual and decadal variability complicates the detection of ongoing long-term trends, but does not preclude a weakening associated with anthropogenic warming. Research priorities include developing robust and sustainable solutions for the long-term monitoring of the AMOC, observation-modelling collaborations to improve the representation of processes in the North Atlantic and better ways to distinguish anthropogenic weakening from internal variability. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Université de Bretagne Occidentale: HAL Nature Reviews Earth & Environment 3 4 241 254 |
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Université de Bretagne Occidentale: HAL |
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English |
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[SDU]Sciences of the Universe [physics] |
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[SDU]Sciences of the Universe [physics] Jackson, Laura C. Biastoch, Arne Buckley, Martha W. Desbruyères, Damien G. Frajka-Williams, Eleanor Moat, Ben Robson, Jon The evolution of the North Atlantic Meridional Overturning Circulation since 1980 |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience The Atlantic Meridional Overturning Circulation (AMOC) is a key component of the climate through its transport of heat in the North Atlantic Ocean. Decadal changes in the AMOC, whether through internal variability or anthropogenically forced weakening, therefore have wide-ranging impacts. In this Review, we synthesize the understanding of contemporary decadal variability in the AMOC, bringing together evidence from observations, ocean reanalyses, forced models and AMOC proxies. Since 1980, there is evidence for periods of strengthening and weakening, although the magnitudes of change (5-25%) are uncertain. In the subpolar North Atlantic, the AMOC strengthened until the mid-1990s and then weakened until the early 2010s, with some evidence of a strengthening thereafter; these changes are probably linked to buoyancy forcing related to the North Atlantic Oscillation. In the subtropics, there is some evidence of the AMOC strengthening from 2001 to 2005 and strong evidence of a weakening from 2005 to 2014. Such large interannual and decadal variability complicates the detection of ongoing long-term trends, but does not preclude a weakening associated with anthropogenic warming. Research priorities include developing robust and sustainable solutions for the long-term monitoring of the AMOC, observation-modelling collaborations to improve the representation of processes in the North Atlantic and better ways to distinguish anthropogenic weakening from internal variability. |
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 |
Jackson, Laura C. Biastoch, Arne Buckley, Martha W. Desbruyères, Damien G. Frajka-Williams, Eleanor Moat, Ben Robson, Jon |
author_facet |
Jackson, Laura C. Biastoch, Arne Buckley, Martha W. Desbruyères, Damien G. Frajka-Williams, Eleanor Moat, Ben Robson, Jon |
author_sort |
Jackson, Laura C. |
title |
The evolution of the North Atlantic Meridional Overturning Circulation since 1980 |
title_short |
The evolution of the North Atlantic Meridional Overturning Circulation since 1980 |
title_full |
The evolution of the North Atlantic Meridional Overturning Circulation since 1980 |
title_fullStr |
The evolution of the North Atlantic Meridional Overturning Circulation since 1980 |
title_full_unstemmed |
The evolution of the North Atlantic Meridional Overturning Circulation since 1980 |
title_sort |
evolution of the north atlantic meridional overturning circulation since 1980 |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-03683295 https://doi.org/10.1038/s43017-022-00263-2 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
EISSN: 2662-138X Nature Reviews Earth & Environment https://insu.hal.science/insu-03683295 Nature Reviews Earth & Environment, 2022, 3, pp.241-254. ⟨10.1038/s43017-022-00263-2⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s43017-022-00263-2 insu-03683295 https://insu.hal.science/insu-03683295 BIBCODE: 2022NRvEE.3.241J doi:10.1038/s43017-022-00263-2 |
op_doi |
https://doi.org/10.1038/s43017-022-00263-2 |
container_title |
Nature Reviews Earth & Environment |
container_volume |
3 |
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4 |
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241 |
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254 |
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