Dynamics of decadal variability in the Atlantic subpolar gyre: a stochastically forced oscillator
International audience Internal variability of the Atlantic subpolar gyre is investigated in a 600 years control simulation of a comprehensive coupled climate model. The subpolar gyre shows irregular oscillations of decadal time scale with most spectral power between 15 and 20 years. Positive and ne...
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Online Access: | https://doi.org/10.1007/S00382-011-1180-4 https://hal.archives-ouvertes.fr/hal-00758313 |
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fttriple:oai:gotriple.eu:10670/1.6i00ni 2023-05-15T17:32:29+02:00 Dynamics of decadal variability in the Atlantic subpolar gyre: a stochastically forced oscillator Born, Andreas Mignot, Juliette Variabilité climatique tropicale et globale (VARCLIM) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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 Paris) 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)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-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)-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) 2012-07-01 https://doi.org/10.1007/S00382-011-1180-4 https://hal.archives-ouvertes.fr/hal-00758313 en eng HAL CCSD Springer Verlag hal-00758313 BIBCODE: 2012ClDy.39.461B doi:10.1007/S00382-011-1180-4 IRD: fdi:010055996 10670/1.6i00ni https://hal.archives-ouvertes.fr/hal-00758313 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics Climate Dynamics, Springer Verlag, 2012, 39, pp.461-474. ⟨10.1007/S00382-011-1180-4⟩ North Atlantic Subpolar gyre Ocean circulation Decadal variability geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2012 fttriple https://doi.org/10.1007/S00382-011-1180-4 2023-01-22T17:00:32Z International audience Internal variability of the Atlantic subpolar gyre is investigated in a 600 years control simulation of a comprehensive coupled climate model. The subpolar gyre shows irregular oscillations of decadal time scale with most spectral power between 15 and 20 years. Positive and negative feedback mechanisms act successively on the circulation leading to an internal oscillation. This involves periodically enhanced deep convection in the subpolar gyre center and intermittently enhanced air-sea thermal coupling. As a result, anomalies of the large-scale atmospheric circulation can be transferred to the ocean on the ocean's intrinsic time scale, exciting the oscillator stochastically. A detailed understanding of oscillatory mechanisms of the ocean and their sensitivity to atmospheric forcing holds considerable potential for decadal predictions as well as for the interpretation of proxy data records. Article in Journal/Newspaper North Atlantic Unknown Climate Dynamics 39 1-2 461 474 |
institution |
Open Polar |
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Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
North Atlantic Subpolar gyre Ocean circulation Decadal variability geo envir |
spellingShingle |
North Atlantic Subpolar gyre Ocean circulation Decadal variability geo envir Born, Andreas Mignot, Juliette Dynamics of decadal variability in the Atlantic subpolar gyre: a stochastically forced oscillator |
topic_facet |
North Atlantic Subpolar gyre Ocean circulation Decadal variability geo envir |
description |
International audience Internal variability of the Atlantic subpolar gyre is investigated in a 600 years control simulation of a comprehensive coupled climate model. The subpolar gyre shows irregular oscillations of decadal time scale with most spectral power between 15 and 20 years. Positive and negative feedback mechanisms act successively on the circulation leading to an internal oscillation. This involves periodically enhanced deep convection in the subpolar gyre center and intermittently enhanced air-sea thermal coupling. As a result, anomalies of the large-scale atmospheric circulation can be transferred to the ocean on the ocean's intrinsic time scale, exciting the oscillator stochastically. A detailed understanding of oscillatory mechanisms of the ocean and their sensitivity to atmospheric forcing holds considerable potential for decadal predictions as well as for the interpretation of proxy data records. |
author2 |
Variabilité climatique tropicale et globale (VARCLIM) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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 Paris) 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)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-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)-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 |
Born, Andreas Mignot, Juliette |
author_facet |
Born, Andreas Mignot, Juliette |
author_sort |
Born, Andreas |
title |
Dynamics of decadal variability in the Atlantic subpolar gyre: a stochastically forced oscillator |
title_short |
Dynamics of decadal variability in the Atlantic subpolar gyre: a stochastically forced oscillator |
title_full |
Dynamics of decadal variability in the Atlantic subpolar gyre: a stochastically forced oscillator |
title_fullStr |
Dynamics of decadal variability in the Atlantic subpolar gyre: a stochastically forced oscillator |
title_full_unstemmed |
Dynamics of decadal variability in the Atlantic subpolar gyre: a stochastically forced oscillator |
title_sort |
dynamics of decadal variability in the atlantic subpolar gyre: a stochastically forced oscillator |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://doi.org/10.1007/S00382-011-1180-4 https://hal.archives-ouvertes.fr/hal-00758313 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics Climate Dynamics, Springer Verlag, 2012, 39, pp.461-474. ⟨10.1007/S00382-011-1180-4⟩ |
op_relation |
hal-00758313 BIBCODE: 2012ClDy.39.461B doi:10.1007/S00382-011-1180-4 IRD: fdi:010055996 10670/1.6i00ni https://hal.archives-ouvertes.fr/hal-00758313 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1007/S00382-011-1180-4 |
container_title |
Climate Dynamics |
container_volume |
39 |
container_issue |
1-2 |
container_start_page |
461 |
op_container_end_page |
474 |
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1766130653664903168 |