Sensitivity of North Atlantic subpolar gyre and overturning to stratification-dependent mixing: response to global warming
International audience We use a reduced complexity climate model with a three-dimensional ocean component and realistic topography to investigate the effect of stratification-dependent mixing on the sensitivity of the North Atlantic subpolar gyre (SPG), and the Atlantic meridional overturning circul...
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ftunivparis:oai:HAL:hal-00760275v1 2024-05-19T07:44:22+00:00 Sensitivity of North Atlantic subpolar gyre and overturning to stratification-dependent mixing: response to global warming Marzeion, Ben Levermann, Anders Mignot, Juliette Potsdam Institute for Climate Impact Research (PIK) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2010-04 https://hal.science/hal-00760275 https://doi.org/10.1007/S00382-008-0521-4 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/S00382-008-0521-4 hal-00760275 https://hal.science/hal-00760275 BIBCODE: 2010ClDy.34.661M doi:10.1007/S00382-008-0521-4 IRD: fdi:010049385 ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-00760275 Climate Dynamics, 2010, 34, pp.661-668. ⟨10.1007/S00382-008-0521-4⟩ Subpolar gyre Global warming Atlantic overturning Ocean mixing [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2010 ftunivparis https://doi.org/10.1007/S00382-008-0521-4 2024-04-23T03:25:06Z International audience We use a reduced complexity climate model with a three-dimensional ocean component and realistic topography to investigate the effect of stratification-dependent mixing on the sensitivity of the North Atlantic subpolar gyre (SPG), and the Atlantic meridional overturning circulation (AMOC), to idealized CO 2 increase and peaking scenarios. The vertical diffusivity of the ocean interior is parameterized as κ ˜ N -α, where N is the local buoyancy frequency. For all parameter values 0 ≤ α ≤ 3, we find the SPG, and subsequently the AMOC, to weaken in response to increasing CO 2 concentrations. The weakening is significantly stronger for α ≥ αcr ≈ 1.5. Depending on the value of α, two separate model states develop. These states remain different after the CO 2 concentration is stabilized, and in some cases even after the CO 2 concentration has been decreased again to the pre-industrial level. This behaviour is explained by a positive feedback between stratification and mixing anomalies in the Nordic Seas, causing a persistent weakening of the SPG. Article in Journal/Newspaper Nordic Seas North Atlantic Université de Paris: Portail HAL Climate Dynamics 34 5 661 668 |
institution |
Open Polar |
collection |
Université de Paris: Portail HAL |
op_collection_id |
ftunivparis |
language |
English |
topic |
Subpolar gyre Global warming Atlantic overturning Ocean mixing [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
Subpolar gyre Global warming Atlantic overturning Ocean mixing [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Marzeion, Ben Levermann, Anders Mignot, Juliette Sensitivity of North Atlantic subpolar gyre and overturning to stratification-dependent mixing: response to global warming |
topic_facet |
Subpolar gyre Global warming Atlantic overturning Ocean mixing [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience We use a reduced complexity climate model with a three-dimensional ocean component and realistic topography to investigate the effect of stratification-dependent mixing on the sensitivity of the North Atlantic subpolar gyre (SPG), and the Atlantic meridional overturning circulation (AMOC), to idealized CO 2 increase and peaking scenarios. The vertical diffusivity of the ocean interior is parameterized as κ ˜ N -α, where N is the local buoyancy frequency. For all parameter values 0 ≤ α ≤ 3, we find the SPG, and subsequently the AMOC, to weaken in response to increasing CO 2 concentrations. The weakening is significantly stronger for α ≥ αcr ≈ 1.5. Depending on the value of α, two separate model states develop. These states remain different after the CO 2 concentration is stabilized, and in some cases even after the CO 2 concentration has been decreased again to the pre-industrial level. This behaviour is explained by a positive feedback between stratification and mixing anomalies in the Nordic Seas, causing a persistent weakening of the SPG. |
author2 |
Potsdam Institute for Climate Impact Research (PIK) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-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)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Marzeion, Ben Levermann, Anders Mignot, Juliette |
author_facet |
Marzeion, Ben Levermann, Anders Mignot, Juliette |
author_sort |
Marzeion, Ben |
title |
Sensitivity of North Atlantic subpolar gyre and overturning to stratification-dependent mixing: response to global warming |
title_short |
Sensitivity of North Atlantic subpolar gyre and overturning to stratification-dependent mixing: response to global warming |
title_full |
Sensitivity of North Atlantic subpolar gyre and overturning to stratification-dependent mixing: response to global warming |
title_fullStr |
Sensitivity of North Atlantic subpolar gyre and overturning to stratification-dependent mixing: response to global warming |
title_full_unstemmed |
Sensitivity of North Atlantic subpolar gyre and overturning to stratification-dependent mixing: response to global warming |
title_sort |
sensitivity of north atlantic subpolar gyre and overturning to stratification-dependent mixing: response to global warming |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00760275 https://doi.org/10.1007/S00382-008-0521-4 |
genre |
Nordic Seas North Atlantic |
genre_facet |
Nordic Seas North Atlantic |
op_source |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-00760275 Climate Dynamics, 2010, 34, pp.661-668. ⟨10.1007/S00382-008-0521-4⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/S00382-008-0521-4 hal-00760275 https://hal.science/hal-00760275 BIBCODE: 2010ClDy.34.661M doi:10.1007/S00382-008-0521-4 IRD: fdi:010049385 |
op_doi |
https://doi.org/10.1007/S00382-008-0521-4 |
container_title |
Climate Dynamics |
container_volume |
34 |
container_issue |
5 |
container_start_page |
661 |
op_container_end_page |
668 |
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1799484149343453184 |