Reconciling the Relationship Between the AMOC and Labrador Sea in OSNAP Observations and Climate Models
International audience The AMOC (Atlantic Meridional Overturning Circulation) is a key driver of climate variability. Our understanding, based largely on climate models, is that the Labrador Sea has an important role in shaping the evolution of the AMOC. However, a recent high‐profile observational...
Published in: | Geophysical Research Letters |
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Main Authors: | , , |
Other Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2020
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Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-02978297 https://hal.sorbonne-universite.fr/hal-02978297/document https://hal.sorbonne-universite.fr/hal-02978297/file/2020GL089793.pdf https://doi.org/10.1029/2020GL089793 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Menary, Matthew, Jackson, Laura, Lozier, M. Susan Reconciling the Relationship Between the AMOC and Labrador Sea in OSNAP Observations and Climate Models |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The AMOC (Atlantic Meridional Overturning Circulation) is a key driver of climate variability. Our understanding, based largely on climate models, is that the Labrador Sea has an important role in shaping the evolution of the AMOC. However, a recent high‐profile observational campaign (Overturning in the Subpolar North Atlantic, OSNAP) has called into question the importance of the Labrador Sea, and hence the credibility of the AMOC representation in climate models. Here, we attempt to reconcile these viewpoints by making the first direct comparison between OSNAP and a coupled climate model. The model compares well to the observations, demonstrating a more prominent role for overturning in the eastern than western subpolar gyre. Density anomalies generated by surface forcing in the Irminger Sea propagate into the Labrador Sea, where they dominate the density variability. Thus, the Labrador Sea may not be the origin of AMOC variability despite correlations with densities there. |
author2 |
Océan et variabilité du climat (VARCLIM) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-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)-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 de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU) Met Office Hadley Centre for Climate Change (MOHC) United Kingdom Met Office Exeter Georgia Institute of Technology Atlanta |
format |
Article in Journal/Newspaper |
author |
Menary, Matthew, Jackson, Laura, Lozier, M. Susan |
author_facet |
Menary, Matthew, Jackson, Laura, Lozier, M. Susan |
author_sort |
Menary, Matthew, |
title |
Reconciling the Relationship Between the AMOC and Labrador Sea in OSNAP Observations and Climate Models |
title_short |
Reconciling the Relationship Between the AMOC and Labrador Sea in OSNAP Observations and Climate Models |
title_full |
Reconciling the Relationship Between the AMOC and Labrador Sea in OSNAP Observations and Climate Models |
title_fullStr |
Reconciling the Relationship Between the AMOC and Labrador Sea in OSNAP Observations and Climate Models |
title_full_unstemmed |
Reconciling the Relationship Between the AMOC and Labrador Sea in OSNAP Observations and Climate Models |
title_sort |
reconciling the relationship between the amoc and labrador sea in osnap observations and climate models |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.sorbonne-universite.fr/hal-02978297 https://hal.sorbonne-universite.fr/hal-02978297/document https://hal.sorbonne-universite.fr/hal-02978297/file/2020GL089793.pdf https://doi.org/10.1029/2020GL089793 |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Irminger Sea |
geographic_facet |
Irminger Sea |
genre |
Labrador Sea North Atlantic |
genre_facet |
Labrador Sea North Atlantic |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.sorbonne-universite.fr/hal-02978297 Geophysical Research Letters, American Geophysical Union, 2020, 47 (18), pp.e2020GL089793. ⟨10.1029/2020GL089793⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2020GL089793 hal-02978297 https://hal.sorbonne-universite.fr/hal-02978297 https://hal.sorbonne-universite.fr/hal-02978297/document https://hal.sorbonne-universite.fr/hal-02978297/file/2020GL089793.pdf doi:10.1029/2020GL089793 WOS: 000576634400042 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2020GL089793 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
18 |
_version_ |
1766060814409662464 |
spelling |
ftccsdartic:oai:HAL:hal-02978297v1 2023-05-15T17:05:56+02:00 Reconciling the Relationship Between the AMOC and Labrador Sea in OSNAP Observations and Climate Models Menary, Matthew, Jackson, Laura, Lozier, M. Susan Océan et variabilité du climat (VARCLIM) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-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)-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 de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU) Met Office Hadley Centre for Climate Change (MOHC) United Kingdom Met Office Exeter Georgia Institute of Technology Atlanta 2020 https://hal.sorbonne-universite.fr/hal-02978297 https://hal.sorbonne-universite.fr/hal-02978297/document https://hal.sorbonne-universite.fr/hal-02978297/file/2020GL089793.pdf https://doi.org/10.1029/2020GL089793 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2020GL089793 hal-02978297 https://hal.sorbonne-universite.fr/hal-02978297 https://hal.sorbonne-universite.fr/hal-02978297/document https://hal.sorbonne-universite.fr/hal-02978297/file/2020GL089793.pdf doi:10.1029/2020GL089793 WOS: 000576634400042 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.sorbonne-universite.fr/hal-02978297 Geophysical Research Letters, American Geophysical Union, 2020, 47 (18), pp.e2020GL089793. ⟨10.1029/2020GL089793⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2020 ftccsdartic https://doi.org/10.1029/2020GL089793 2021-12-19T00:50:31Z International audience The AMOC (Atlantic Meridional Overturning Circulation) is a key driver of climate variability. Our understanding, based largely on climate models, is that the Labrador Sea has an important role in shaping the evolution of the AMOC. However, a recent high‐profile observational campaign (Overturning in the Subpolar North Atlantic, OSNAP) has called into question the importance of the Labrador Sea, and hence the credibility of the AMOC representation in climate models. Here, we attempt to reconcile these viewpoints by making the first direct comparison between OSNAP and a coupled climate model. The model compares well to the observations, demonstrating a more prominent role for overturning in the eastern than western subpolar gyre. Density anomalies generated by surface forcing in the Irminger Sea propagate into the Labrador Sea, where they dominate the density variability. Thus, the Labrador Sea may not be the origin of AMOC variability despite correlations with densities there. Article in Journal/Newspaper Labrador Sea North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Geophysical Research Letters 47 18 |