Advances in reconstructing the AMOC using sea surface observations of salinity
International audience The Atlantic meridional overturning circulation (AMOC) is one of the main drivers of climate variability at decadal and longer time scales. As there are no direct multi-decadal observations of this key circulation, the reconstruction of past AMOC variations is essential. This...
Published in: | Climate Dynamics |
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Language: | English |
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HAL CCSD
2020
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Online Access: | https://hal.sorbonne-universite.fr/hal-02883317 https://hal.sorbonne-universite.fr/hal-02883317/document https://hal.sorbonne-universite.fr/hal-02883317/file/Estella-Perez2020_Article_AdvancesInReconstructingTheAMO.pdf https://doi.org/10.1007/s00382-020-05304-4 |
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[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Estella-Perez, Victor Mignot, Juliette Guilyardi, Éric Swingedouw, Didier Reverdin, Gilles Advances in reconstructing the AMOC using sea surface observations of salinity |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The Atlantic meridional overturning circulation (AMOC) is one of the main drivers of climate variability at decadal and longer time scales. As there are no direct multi-decadal observations of this key circulation, the reconstruction of past AMOC variations is essential. This work presents a step forward in reconstructing the AMOC using climate models and time-varying surface nudging of salinity and temperature data, for which independent multi-decadal observed series are available. A number of nudging protocols are explored in a perfect model framework to best reproduce the AMOC variability accommodating to the characteristics of SST and SSS available products. As reference SST products with sufficient space and time coverage are available, we here choose to focus on the limitations associated to SSS products with the goal of providing protocols using independent salinity products. We consider a global gridded dataset and, additionally, a coarser SSS dataset restricted to the Atlantic and with a quite low spatial resolution (order of 10 degrees vs. 2 for the model grid). We show how, using the latter, we can improve the efficiency of the nudging on the AMOC reconstruction by adding a high-resolution annual cycle to the coarse resolution SSS product as well as a spatial downscaling to account for SSS gradient. The final protocol retained for the coarse SSS data is able to reconstruct a 100-year long AMOC period (average of 10.18 Sv and a standard deviation of 1.39 Sv), with a correlation of 0.76 to the target and a RMSE of 0.99 Sv. These values can be respectively compared to 0.85 and 0.75 Sv when using the global salinity surface observations. This work provides a first step towards understanding the limitations and prospects of historical AMOC reconstructions using different sea surface salinity datasets for the surface nudging. |
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) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Processus et interactions de fine échelle océanique (PROTEO) ANR-18-MPGA-0001,ARCHANGE,Changement climatique et Arctique et circulation océanique globale(2018) ANR-17-EURE-0006,IPSL-CGS,IPSL Climate graduate school(2017) European Project: 727852,Blue-Action(2016) |
format |
Article in Journal/Newspaper |
author |
Estella-Perez, Victor Mignot, Juliette Guilyardi, Éric Swingedouw, Didier Reverdin, Gilles |
author_facet |
Estella-Perez, Victor Mignot, Juliette Guilyardi, Éric Swingedouw, Didier Reverdin, Gilles |
author_sort |
Estella-Perez, Victor |
title |
Advances in reconstructing the AMOC using sea surface observations of salinity |
title_short |
Advances in reconstructing the AMOC using sea surface observations of salinity |
title_full |
Advances in reconstructing the AMOC using sea surface observations of salinity |
title_fullStr |
Advances in reconstructing the AMOC using sea surface observations of salinity |
title_full_unstemmed |
Advances in reconstructing the AMOC using sea surface observations of salinity |
title_sort |
advances in reconstructing the amoc using sea surface observations of salinity |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.sorbonne-universite.fr/hal-02883317 https://hal.sorbonne-universite.fr/hal-02883317/document https://hal.sorbonne-universite.fr/hal-02883317/file/Estella-Perez2020_Article_AdvancesInReconstructingTheAMO.pdf https://doi.org/10.1007/s00382-020-05304-4 |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.sorbonne-universite.fr/hal-02883317 Climate Dynamics, 2020, 1, ⟨10.1007/s00382-020-05304-4⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-020-05304-4 info:eu-repo/grantAgreement//727852/EU/Blue-Action: Arctic impact on weather and climat/Blue-Action hal-02883317 https://hal.sorbonne-universite.fr/hal-02883317 https://hal.sorbonne-universite.fr/hal-02883317/document https://hal.sorbonne-universite.fr/hal-02883317/file/Estella-Perez2020_Article_AdvancesInReconstructingTheAMO.pdf doi:10.1007/s00382-020-05304-4 IRD: fdi:010078188 WOS: 000539985000002 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1007/s00382-020-05304-4 |
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Climate Dynamics |
container_volume |
55 |
container_issue |
3-4 |
container_start_page |
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op_container_end_page |
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ftceafr:oai:HAL:hal-02883317v1 2024-05-19T07:33:24+00:00 Advances in reconstructing the AMOC using sea surface observations of salinity Estella-Perez, Victor Mignot, Juliette Guilyardi, Éric Swingedouw, Didier Reverdin, Gilles 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) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Processus et interactions de fine échelle océanique (PROTEO) ANR-18-MPGA-0001,ARCHANGE,Changement climatique et Arctique et circulation océanique globale(2018) ANR-17-EURE-0006,IPSL-CGS,IPSL Climate graduate school(2017) European Project: 727852,Blue-Action(2016) 2020-06 https://hal.sorbonne-universite.fr/hal-02883317 https://hal.sorbonne-universite.fr/hal-02883317/document https://hal.sorbonne-universite.fr/hal-02883317/file/Estella-Perez2020_Article_AdvancesInReconstructingTheAMO.pdf https://doi.org/10.1007/s00382-020-05304-4 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-020-05304-4 info:eu-repo/grantAgreement//727852/EU/Blue-Action: Arctic impact on weather and climat/Blue-Action hal-02883317 https://hal.sorbonne-universite.fr/hal-02883317 https://hal.sorbonne-universite.fr/hal-02883317/document https://hal.sorbonne-universite.fr/hal-02883317/file/Estella-Perez2020_Article_AdvancesInReconstructingTheAMO.pdf doi:10.1007/s00382-020-05304-4 IRD: fdi:010078188 WOS: 000539985000002 info:eu-repo/semantics/OpenAccess ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.sorbonne-universite.fr/hal-02883317 Climate Dynamics, 2020, 1, ⟨10.1007/s00382-020-05304-4⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2020 ftceafr https://doi.org/10.1007/s00382-020-05304-4 2024-04-25T01:49:18Z International audience The Atlantic meridional overturning circulation (AMOC) is one of the main drivers of climate variability at decadal and longer time scales. As there are no direct multi-decadal observations of this key circulation, the reconstruction of past AMOC variations is essential. This work presents a step forward in reconstructing the AMOC using climate models and time-varying surface nudging of salinity and temperature data, for which independent multi-decadal observed series are available. A number of nudging protocols are explored in a perfect model framework to best reproduce the AMOC variability accommodating to the characteristics of SST and SSS available products. As reference SST products with sufficient space and time coverage are available, we here choose to focus on the limitations associated to SSS products with the goal of providing protocols using independent salinity products. We consider a global gridded dataset and, additionally, a coarser SSS dataset restricted to the Atlantic and with a quite low spatial resolution (order of 10 degrees vs. 2 for the model grid). We show how, using the latter, we can improve the efficiency of the nudging on the AMOC reconstruction by adding a high-resolution annual cycle to the coarse resolution SSS product as well as a spatial downscaling to account for SSS gradient. The final protocol retained for the coarse SSS data is able to reconstruct a 100-year long AMOC period (average of 10.18 Sv and a standard deviation of 1.39 Sv), with a correlation of 0.76 to the target and a RMSE of 0.99 Sv. These values can be respectively compared to 0.85 and 0.75 Sv when using the global salinity surface observations. This work provides a first step towards understanding the limitations and prospects of historical AMOC reconstructions using different sea surface salinity datasets for the surface nudging. Article in Journal/Newspaper Arctic HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Climate Dynamics 55 3-4 975 992 |