Influence of the North Atlantic SST Variability on the Atmospheric Circulation during the Twentieth Century
International audience The ocean–atmosphere coupling in the North Atlantic is investigated during the twentieth century using maximum covariance analysis of sea surface temperature (SST) and 500-hPa geopotential height analyses and performing regressions on dynamical diagnostics such as Eady growth...
Published in: | Journal of Climate |
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Main Authors: | , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2015
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Online Access: | https://hal.sorbonne-universite.fr/hal-01122524 https://hal.sorbonne-universite.fr/hal-01122524/document https://hal.sorbonne-universite.fr/hal-01122524/file/Gastineau_2014_Influence_of_the.pdf https://doi.org/10.1175/JCLI-D-14-00424.1 |
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openpolar |
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Open Polar |
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Université de Paris: Portail HAL |
op_collection_id |
ftunivparis |
language |
English |
topic |
Multidecadal variability Climate variability North Atlantic Oscillation Atmosphere-ocean interaction Teleconnections [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
Multidecadal variability Climate variability North Atlantic Oscillation Atmosphere-ocean interaction Teleconnections [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Gastineau, Guillaume Frankignoul, Claude Influence of the North Atlantic SST Variability on the Atmospheric Circulation during the Twentieth Century |
topic_facet |
Multidecadal variability Climate variability North Atlantic Oscillation Atmosphere-ocean interaction Teleconnections [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
International audience The ocean–atmosphere coupling in the North Atlantic is investigated during the twentieth century using maximum covariance analysis of sea surface temperature (SST) and 500-hPa geopotential height analyses and performing regressions on dynamical diagnostics such as Eady growth rate, wave activity flux, and velocity potential. The North Atlantic Oscillation (NAO) generates the so-called SST anomaly tripole. A rather similar SST anomaly tripole, with the subpolar anomaly displaced to the east and a more contracted subtropical anomaly, which is referred to as the North Atlantic horseshoe pattern, in turn influences the atmosphere. In the fall and early winter, the response is NAO like and primarily results from subpolar forcing centered over the Labrador Sea and off Newfoundland. In summer, the largest atmospheric response to SST resembles the east Atlantic pattern and results from a combination of subpolar and tropical forcing. To emphasize the interannual to multidecadal variability, the same analysis is repeated after low-pass filtering. The SST influence is dominated by the Atlantic multidecadal oscillation (AMO), which also has a horseshoe shape, but with larger amplitude in the subpolar basin. A warm AMO phase leads to an atmospheric warming limited to the lower troposphere in summer, while it leads to a negative phase of the NAO in winter. The winter influence of the AMO is suggested to be primarily forced by the Atlantic SSTs in the northern sub-tropics. Such influence of the AMO is found in winter instead of early winter because the winter SST anomalies have a larger persistence, presumably because of SST reemergence. |
author2 |
Processus de la variabilité climatique tropicale et impacts (PARVATI) 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)-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)) 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 |
Gastineau, Guillaume Frankignoul, Claude |
author_facet |
Gastineau, Guillaume Frankignoul, Claude |
author_sort |
Gastineau, Guillaume |
title |
Influence of the North Atlantic SST Variability on the Atmospheric Circulation during the Twentieth Century |
title_short |
Influence of the North Atlantic SST Variability on the Atmospheric Circulation during the Twentieth Century |
title_full |
Influence of the North Atlantic SST Variability on the Atmospheric Circulation during the Twentieth Century |
title_fullStr |
Influence of the North Atlantic SST Variability on the Atmospheric Circulation during the Twentieth Century |
title_full_unstemmed |
Influence of the North Atlantic SST Variability on the Atmospheric Circulation during the Twentieth Century |
title_sort |
influence of the north atlantic sst variability on the atmospheric circulation during the twentieth century |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.sorbonne-universite.fr/hal-01122524 https://hal.sorbonne-universite.fr/hal-01122524/document https://hal.sorbonne-universite.fr/hal-01122524/file/Gastineau_2014_Influence_of_the.pdf https://doi.org/10.1175/JCLI-D-14-00424.1 |
genre |
Labrador Sea Newfoundland North Atlantic North Atlantic oscillation |
genre_facet |
Labrador Sea Newfoundland North Atlantic North Atlantic oscillation |
op_source |
ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.sorbonne-universite.fr/hal-01122524 Journal of Climate, 2015, 28 (4), pp.1396-1416. ⟨10.1175/JCLI-D-14-00424.1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1175/JCLI-D-14-00424.1 hal-01122524 https://hal.sorbonne-universite.fr/hal-01122524 https://hal.sorbonne-universite.fr/hal-01122524/document https://hal.sorbonne-universite.fr/hal-01122524/file/Gastineau_2014_Influence_of_the.pdf doi:10.1175/JCLI-D-14-00424.1 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1175/JCLI-D-14-00424.1 |
container_title |
Journal of Climate |
container_volume |
28 |
container_issue |
4 |
container_start_page |
1396 |
op_container_end_page |
1416 |
_version_ |
1799483327063785472 |
spelling |
ftunivparis:oai:HAL:hal-01122524v1 2024-05-19T07:43:36+00:00 Influence of the North Atlantic SST Variability on the Atmospheric Circulation during the Twentieth Century Gastineau, Guillaume Frankignoul, Claude Processus de la variabilité climatique tropicale et impacts (PARVATI) 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)-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)) 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) 2015-02-01 https://hal.sorbonne-universite.fr/hal-01122524 https://hal.sorbonne-universite.fr/hal-01122524/document https://hal.sorbonne-universite.fr/hal-01122524/file/Gastineau_2014_Influence_of_the.pdf https://doi.org/10.1175/JCLI-D-14-00424.1 en eng HAL CCSD American Meteorological Society info:eu-repo/semantics/altIdentifier/doi/10.1175/JCLI-D-14-00424.1 hal-01122524 https://hal.sorbonne-universite.fr/hal-01122524 https://hal.sorbonne-universite.fr/hal-01122524/document https://hal.sorbonne-universite.fr/hal-01122524/file/Gastineau_2014_Influence_of_the.pdf doi:10.1175/JCLI-D-14-00424.1 info:eu-repo/semantics/OpenAccess ISSN: 0894-8755 EISSN: 1520-0442 Journal of Climate https://hal.sorbonne-universite.fr/hal-01122524 Journal of Climate, 2015, 28 (4), pp.1396-1416. ⟨10.1175/JCLI-D-14-00424.1⟩ Multidecadal variability Climate variability North Atlantic Oscillation Atmosphere-ocean interaction Teleconnections [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2015 ftunivparis https://doi.org/10.1175/JCLI-D-14-00424.1 2024-04-23T03:53:53Z International audience The ocean–atmosphere coupling in the North Atlantic is investigated during the twentieth century using maximum covariance analysis of sea surface temperature (SST) and 500-hPa geopotential height analyses and performing regressions on dynamical diagnostics such as Eady growth rate, wave activity flux, and velocity potential. The North Atlantic Oscillation (NAO) generates the so-called SST anomaly tripole. A rather similar SST anomaly tripole, with the subpolar anomaly displaced to the east and a more contracted subtropical anomaly, which is referred to as the North Atlantic horseshoe pattern, in turn influences the atmosphere. In the fall and early winter, the response is NAO like and primarily results from subpolar forcing centered over the Labrador Sea and off Newfoundland. In summer, the largest atmospheric response to SST resembles the east Atlantic pattern and results from a combination of subpolar and tropical forcing. To emphasize the interannual to multidecadal variability, the same analysis is repeated after low-pass filtering. The SST influence is dominated by the Atlantic multidecadal oscillation (AMO), which also has a horseshoe shape, but with larger amplitude in the subpolar basin. A warm AMO phase leads to an atmospheric warming limited to the lower troposphere in summer, while it leads to a negative phase of the NAO in winter. The winter influence of the AMO is suggested to be primarily forced by the Atlantic SSTs in the northern sub-tropics. Such influence of the AMO is found in winter instead of early winter because the winter SST anomalies have a larger persistence, presumably because of SST reemergence. Article in Journal/Newspaper Labrador Sea Newfoundland North Atlantic North Atlantic oscillation Université de Paris: Portail HAL Journal of Climate 28 4 1396 1416 |