Climate Response to Atlantic Meridional Energy Transport Variations
International audience Abstract The climate responses to Atlantic meridional overturning circulation (AMOC) fluctuations are investigated in a hierarchy of sensitivity experiments. We modify the baroclinic component of the North Atlantic Ocean currents online in an atmosphere–ocean general circulati...
Published in: | Journal of Climate |
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2023
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Online Access: | https://hal.science/hal-04219891 https://hal.science/hal-04219891/document https://hal.science/hal-04219891/file/clim-JCLI-D-22-0608.1.pdf https://doi.org/10.1175/jcli-d-22-0608.1 |
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Open Polar |
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Université de Paris: Portail HAL |
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ftunivparis |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Jiang, Weimin Gastineau, Guillaume Codron, Francis Climate Response to Atlantic Meridional Energy Transport Variations |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Abstract The climate responses to Atlantic meridional overturning circulation (AMOC) fluctuations are investigated in a hierarchy of sensitivity experiments. We modify the baroclinic component of the North Atlantic Ocean currents online in an atmosphere–ocean general circulation model to reproduce typical AMOC multidecadal variability found in a preindustrial control simulation in the same model. An analogous experiment is also conducted using a slab-ocean experiment. The responses to a strong AMOC include a widespread warming in the Northern Hemisphere and a northward shift of the intertropical convergence zone over the Atlantic Ocean. The driving mechanism of climate responses is then investigated with the changes in the energy flows in the ocean and atmosphere. The large-scale atmospheric changes in the tropics are organized by an anomalous cross-equatorial Hadley circulation transporting energy southward and moisture and heat northward. Changes in the Indo-Pacific Ocean circulation and heat transport, driven by the wind stress associated with the abnormal Hadley cell, damp the atmospheric responses. The lack of Indo-Pacific transport and ocean heat storage leads to amplified atmospheric changes in the slab-ocean experiments, which are further amplified by a positive feedback due to the interhemispheric antisymmetric changes in low cloud cover. |
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) ANR-17-EURE-0006,IPSL-CGS,IPSL Climate graduate school(2017) ANR-19-JPOC-0003,ROADMAP,The Role of ocean dynamics and Ocean-Atmosphere interactions in Driving cliMAte variations and future Projections of impact-relevant extreme events(2019) |
format |
Article in Journal/Newspaper |
author |
Jiang, Weimin Gastineau, Guillaume Codron, Francis |
author_facet |
Jiang, Weimin Gastineau, Guillaume Codron, Francis |
author_sort |
Jiang, Weimin |
title |
Climate Response to Atlantic Meridional Energy Transport Variations |
title_short |
Climate Response to Atlantic Meridional Energy Transport Variations |
title_full |
Climate Response to Atlantic Meridional Energy Transport Variations |
title_fullStr |
Climate Response to Atlantic Meridional Energy Transport Variations |
title_full_unstemmed |
Climate Response to Atlantic Meridional Energy Transport Variations |
title_sort |
climate response to atlantic meridional energy transport variations |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04219891 https://hal.science/hal-04219891/document https://hal.science/hal-04219891/file/clim-JCLI-D-22-0608.1.pdf https://doi.org/10.1175/jcli-d-22-0608.1 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.science/hal-04219891 Journal of Climate, 2023, 36 (16), pp.5399-5416. ⟨10.1175/jcli-d-22-0608.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/jcli-d-22-0608.1 hal-04219891 https://hal.science/hal-04219891 https://hal.science/hal-04219891/document https://hal.science/hal-04219891/file/clim-JCLI-D-22-0608.1.pdf doi:10.1175/jcli-d-22-0608.1 WOS: 001032317700001 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/jcli-d-22-0608.1 |
container_title |
Journal of Climate |
container_volume |
36 |
container_issue |
16 |
container_start_page |
5399 |
op_container_end_page |
5416 |
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1799485108390985728 |
spelling |
ftunivparis:oai:HAL:hal-04219891v1 2024-05-19T07:45:09+00:00 Climate Response to Atlantic Meridional Energy Transport Variations Jiang, Weimin Gastineau, Guillaume Codron, Francis 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-17-EURE-0006,IPSL-CGS,IPSL Climate graduate school(2017) ANR-19-JPOC-0003,ROADMAP,The Role of ocean dynamics and Ocean-Atmosphere interactions in Driving cliMAte variations and future Projections of impact-relevant extreme events(2019) 2023-08-15 https://hal.science/hal-04219891 https://hal.science/hal-04219891/document https://hal.science/hal-04219891/file/clim-JCLI-D-22-0608.1.pdf https://doi.org/10.1175/jcli-d-22-0608.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/jcli-d-22-0608.1 hal-04219891 https://hal.science/hal-04219891 https://hal.science/hal-04219891/document https://hal.science/hal-04219891/file/clim-JCLI-D-22-0608.1.pdf doi:10.1175/jcli-d-22-0608.1 WOS: 001032317700001 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.science/hal-04219891 Journal of Climate, 2023, 36 (16), pp.5399-5416. ⟨10.1175/jcli-d-22-0608.1⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2023 ftunivparis https://doi.org/10.1175/jcli-d-22-0608.1 2024-04-23T03:31:14Z International audience Abstract The climate responses to Atlantic meridional overturning circulation (AMOC) fluctuations are investigated in a hierarchy of sensitivity experiments. We modify the baroclinic component of the North Atlantic Ocean currents online in an atmosphere–ocean general circulation model to reproduce typical AMOC multidecadal variability found in a preindustrial control simulation in the same model. An analogous experiment is also conducted using a slab-ocean experiment. The responses to a strong AMOC include a widespread warming in the Northern Hemisphere and a northward shift of the intertropical convergence zone over the Atlantic Ocean. The driving mechanism of climate responses is then investigated with the changes in the energy flows in the ocean and atmosphere. The large-scale atmospheric changes in the tropics are organized by an anomalous cross-equatorial Hadley circulation transporting energy southward and moisture and heat northward. Changes in the Indo-Pacific Ocean circulation and heat transport, driven by the wind stress associated with the abnormal Hadley cell, damp the atmospheric responses. The lack of Indo-Pacific transport and ocean heat storage leads to amplified atmospheric changes in the slab-ocean experiments, which are further amplified by a positive feedback due to the interhemispheric antisymmetric changes in low cloud cover. Article in Journal/Newspaper North Atlantic Université de Paris: Portail HAL Journal of Climate 36 16 5399 5416 |