Disentangling internal and external contributions to Atlantic multidecadal variability over the past millennium
International audience The Atlantic multidecadal variability (AMV) modulates the North Atlantic surface ocean variability and affects decadal climates over the globe; its underlying mechanisms remain, however, under debate. In this study, we use a multi-model ensemble of transient past-millennium (8...
Published in: | Geophysical Research Letters |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2021
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Online Access: | https://hal.science/hal-03530833 https://hal.science/hal-03530833/document https://hal.science/hal-03530833/file/Geophysical%20Research%20Letters%20-%202021%20-%20Fang%20-%20Disentangling%20Internal%20and%20External%20Contributions%20to%20Atlantic%20Multidecadal.pdf https://doi.org/10.1029/2021gl095990 |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[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 |
[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] Fang, Shih‐wei Khodri, Myriam Timmreck, Claudia Zanchettin, Davide Jungclaus, Johann Disentangling internal and external contributions to Atlantic multidecadal variability over the past millennium |
topic_facet |
[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 The Atlantic multidecadal variability (AMV) modulates the North Atlantic surface ocean variability and affects decadal climates over the globe; its underlying mechanisms remain, however, under debate. In this study, we use a multi-model ensemble of transient past-millennium (850–1849) and unperturbed preindustrial control simulations contributing to the paleoclimate modeling intercomparison project—phase 4 (PMIP4) to decompose the AMV signal into the internal AMV and the external signal. The internal component of AMV exhibits no robust behavior across simulations during periods of major forcing such as strong volcanic eruptions, whereas the external forced temperature responds to volcanic eruptions with an immediate radiative cooling followed, in some simulations, by a sequence of damped multidecadal oscillations. The internal component tightly relates with the Atlantic meridional overturning circulation (AMOC) and dominates the fluctuations of AMV; whereas the external signal has limited impacts on AMOC and explains ∼25% of the AMV variance over the past millennium. |
author2 |
Max-Planck-Institut für Meteorologie (MPI-M) Max-Planck-Gesellschaft 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) University of Ca’ Foscari Venice, Italy |
format |
Article in Journal/Newspaper |
author |
Fang, Shih‐wei Khodri, Myriam Timmreck, Claudia Zanchettin, Davide Jungclaus, Johann |
author_facet |
Fang, Shih‐wei Khodri, Myriam Timmreck, Claudia Zanchettin, Davide Jungclaus, Johann |
author_sort |
Fang, Shih‐wei |
title |
Disentangling internal and external contributions to Atlantic multidecadal variability over the past millennium |
title_short |
Disentangling internal and external contributions to Atlantic multidecadal variability over the past millennium |
title_full |
Disentangling internal and external contributions to Atlantic multidecadal variability over the past millennium |
title_fullStr |
Disentangling internal and external contributions to Atlantic multidecadal variability over the past millennium |
title_full_unstemmed |
Disentangling internal and external contributions to Atlantic multidecadal variability over the past millennium |
title_sort |
disentangling internal and external contributions to atlantic multidecadal variability over the past millennium |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03530833 https://hal.science/hal-03530833/document https://hal.science/hal-03530833/file/Geophysical%20Research%20Letters%20-%202021%20-%20Fang%20-%20Disentangling%20Internal%20and%20External%20Contributions%20to%20Atlantic%20Multidecadal.pdf https://doi.org/10.1029/2021gl095990 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-03530833 Geophysical Research Letters, 2021, 48 (23), ⟨10.1029/2021gl095990⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2021gl095990 hal-03530833 https://hal.science/hal-03530833 https://hal.science/hal-03530833/document https://hal.science/hal-03530833/file/Geophysical%20Research%20Letters%20-%202021%20-%20Fang%20-%20Disentangling%20Internal%20and%20External%20Contributions%20to%20Atlantic%20Multidecadal.pdf doi:10.1029/2021gl095990 IRD: fdi:010083850 WOS: 000730019700071 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2021gl095990 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
23 |
_version_ |
1766131508604567552 |
spelling |
ftunivnantes:oai:HAL:hal-03530833v1 2023-05-15T17:33:07+02:00 Disentangling internal and external contributions to Atlantic multidecadal variability over the past millennium Fang, Shih‐wei Khodri, Myriam Timmreck, Claudia Zanchettin, Davide Jungclaus, Johann Max-Planck-Institut für Meteorologie (MPI-M) Max-Planck-Gesellschaft 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) University of Ca’ Foscari Venice, Italy 2021-12-16 https://hal.science/hal-03530833 https://hal.science/hal-03530833/document https://hal.science/hal-03530833/file/Geophysical%20Research%20Letters%20-%202021%20-%20Fang%20-%20Disentangling%20Internal%20and%20External%20Contributions%20to%20Atlantic%20Multidecadal.pdf https://doi.org/10.1029/2021gl095990 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2021gl095990 hal-03530833 https://hal.science/hal-03530833 https://hal.science/hal-03530833/document https://hal.science/hal-03530833/file/Geophysical%20Research%20Letters%20-%202021%20-%20Fang%20-%20Disentangling%20Internal%20and%20External%20Contributions%20to%20Atlantic%20Multidecadal.pdf doi:10.1029/2021gl095990 IRD: fdi:010083850 WOS: 000730019700071 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.science/hal-03530833 Geophysical Research Letters, 2021, 48 (23), ⟨10.1029/2021gl095990⟩ [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 2021 ftunivnantes https://doi.org/10.1029/2021gl095990 2023-01-18T00:18:46Z International audience The Atlantic multidecadal variability (AMV) modulates the North Atlantic surface ocean variability and affects decadal climates over the globe; its underlying mechanisms remain, however, under debate. In this study, we use a multi-model ensemble of transient past-millennium (850–1849) and unperturbed preindustrial control simulations contributing to the paleoclimate modeling intercomparison project—phase 4 (PMIP4) to decompose the AMV signal into the internal AMV and the external signal. The internal component of AMV exhibits no robust behavior across simulations during periods of major forcing such as strong volcanic eruptions, whereas the external forced temperature responds to volcanic eruptions with an immediate radiative cooling followed, in some simulations, by a sequence of damped multidecadal oscillations. The internal component tightly relates with the Atlantic meridional overturning circulation (AMOC) and dominates the fluctuations of AMV; whereas the external signal has limited impacts on AMOC and explains ∼25% of the AMV variance over the past millennium. Article in Journal/Newspaper North Atlantic Université de Nantes: HAL-UNIV-NANTES Geophysical Research Letters 48 23 |