Dynamics of Spontaneous (Multi) Centennial‐Scale Variations of the Atlantic Meridional Overturning Circulation Strength During the Last Interglacial
International audience Recent reconstructions of bottom water δ 13 C during the last interglacial (LIG) suggest short-lived variability in the Atlantic meridional overturning circulation (AMOC). Spontaneous (multi) centennial-scale variability of the AMOC simulated in the Earth system model of inter...
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://hal.science/hal-02936233 https://hal.science/hal-02936233/document https://hal.science/hal-02936233/file/2020PA003913.pdf https://doi.org/10.1029/2020PA003913 |
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ftuniversailles:oai:HAL:hal-02936233v1 2024-04-28T08:21:59+00:00 Dynamics of Spontaneous (Multi) Centennial‐Scale Variations of the Atlantic Meridional Overturning Circulation Strength During the Last Interglacial Kessler, A. Bouttes, N. Roche, Didier M. Ninnemann, U. Tjiputra, J. Bjerknes Centre for Climate Research (BCCR) Department of Biological Sciences Bergen (BIO / UiB) University of Bergen (UiB)-University of Bergen (UiB) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Modélisation du climat (CLIM) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Vrije Universiteit Amsterdam Amsterdam (VU) Department of Earth Science Bergen (UiB) University of Bergen (UiB) 2020 https://hal.science/hal-02936233 https://hal.science/hal-02936233/document https://hal.science/hal-02936233/file/2020PA003913.pdf https://doi.org/10.1029/2020PA003913 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2020PA003913 hal-02936233 https://hal.science/hal-02936233 https://hal.science/hal-02936233/document https://hal.science/hal-02936233/file/2020PA003913.pdf doi:10.1029/2020PA003913 info:eu-repo/semantics/OpenAccess ISSN: 2572-4525 EISSN: 1944-9186 Paleoceanography and Paleoclimatology https://hal.science/hal-02936233 Paleoceanography and Paleoclimatology, 2020, 35 (8), pp.e2020PA003913. ⟨10.1029/2020PA003913⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2020 ftuniversailles https://doi.org/10.1029/2020PA003913 2024-04-04T17:36:17Z International audience Recent reconstructions of bottom water δ 13 C during the last interglacial (LIG) suggest short-lived variability in the Atlantic meridional overturning circulation (AMOC). Spontaneous (multi) centennial-scale variability of the AMOC simulated in the Earth system model of intermediate complexity iLOVECLIM are investigated for that period. The model simulates abrupt AMOC transitions occurring at 300 years frequency and correspond to a switch of the AMOC vigor between a strong (∼17 Sv) and a weak (∼11 Sv) state. The onset of these abrupt transitions is associated with changes in orbital forcings resulting in the decline of summer insolation in the high latitudes of the North Atlantic and affecting the sea ice cover in two key deep convection regions: (1) the northern Nordic Seas (NNS) and (2) the northwest North Atlantic (NWNA). Northward inflow of Atlantic surface water increases the convection depth in (1) and strengthens the Greenland Iceland Norway (GIN) Seas overturning circulation. Subsequent ocean-atmosphere interactions involving sea ice, ocean heat release, anomalies of evaporation-precipitation, and wind stress over the Nordic Seas lead also to an increase in deep convection in (2), followed by increase in the AMOC strength. Article in Journal/Newspaper Greenland Iceland Nordic Seas North Atlantic Sea ice Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Paleoceanography and Paleoclimatology 35 8 |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Kessler, A. Bouttes, N. Roche, Didier M. Ninnemann, U. Tjiputra, J. Dynamics of Spontaneous (Multi) Centennial‐Scale Variations of the Atlantic Meridional Overturning Circulation Strength During the Last Interglacial |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Recent reconstructions of bottom water δ 13 C during the last interglacial (LIG) suggest short-lived variability in the Atlantic meridional overturning circulation (AMOC). Spontaneous (multi) centennial-scale variability of the AMOC simulated in the Earth system model of intermediate complexity iLOVECLIM are investigated for that period. The model simulates abrupt AMOC transitions occurring at 300 years frequency and correspond to a switch of the AMOC vigor between a strong (∼17 Sv) and a weak (∼11 Sv) state. The onset of these abrupt transitions is associated with changes in orbital forcings resulting in the decline of summer insolation in the high latitudes of the North Atlantic and affecting the sea ice cover in two key deep convection regions: (1) the northern Nordic Seas (NNS) and (2) the northwest North Atlantic (NWNA). Northward inflow of Atlantic surface water increases the convection depth in (1) and strengthens the Greenland Iceland Norway (GIN) Seas overturning circulation. Subsequent ocean-atmosphere interactions involving sea ice, ocean heat release, anomalies of evaporation-precipitation, and wind stress over the Nordic Seas lead also to an increase in deep convection in (2), followed by increase in the AMOC strength. |
author2 |
Bjerknes Centre for Climate Research (BCCR) Department of Biological Sciences Bergen (BIO / UiB) University of Bergen (UiB)-University of Bergen (UiB) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Modélisation du climat (CLIM) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Vrije Universiteit Amsterdam Amsterdam (VU) Department of Earth Science Bergen (UiB) University of Bergen (UiB) |
format |
Article in Journal/Newspaper |
author |
Kessler, A. Bouttes, N. Roche, Didier M. Ninnemann, U. Tjiputra, J. |
author_facet |
Kessler, A. Bouttes, N. Roche, Didier M. Ninnemann, U. Tjiputra, J. |
author_sort |
Kessler, A. |
title |
Dynamics of Spontaneous (Multi) Centennial‐Scale Variations of the Atlantic Meridional Overturning Circulation Strength During the Last Interglacial |
title_short |
Dynamics of Spontaneous (Multi) Centennial‐Scale Variations of the Atlantic Meridional Overturning Circulation Strength During the Last Interglacial |
title_full |
Dynamics of Spontaneous (Multi) Centennial‐Scale Variations of the Atlantic Meridional Overturning Circulation Strength During the Last Interglacial |
title_fullStr |
Dynamics of Spontaneous (Multi) Centennial‐Scale Variations of the Atlantic Meridional Overturning Circulation Strength During the Last Interglacial |
title_full_unstemmed |
Dynamics of Spontaneous (Multi) Centennial‐Scale Variations of the Atlantic Meridional Overturning Circulation Strength During the Last Interglacial |
title_sort |
dynamics of spontaneous (multi) centennial‐scale variations of the atlantic meridional overturning circulation strength during the last interglacial |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02936233 https://hal.science/hal-02936233/document https://hal.science/hal-02936233/file/2020PA003913.pdf https://doi.org/10.1029/2020PA003913 |
genre |
Greenland Iceland Nordic Seas North Atlantic Sea ice |
genre_facet |
Greenland Iceland Nordic Seas North Atlantic Sea ice |
op_source |
ISSN: 2572-4525 EISSN: 1944-9186 Paleoceanography and Paleoclimatology https://hal.science/hal-02936233 Paleoceanography and Paleoclimatology, 2020, 35 (8), pp.e2020PA003913. ⟨10.1029/2020PA003913⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2020PA003913 hal-02936233 https://hal.science/hal-02936233 https://hal.science/hal-02936233/document https://hal.science/hal-02936233/file/2020PA003913.pdf doi:10.1029/2020PA003913 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2020PA003913 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
35 |
container_issue |
8 |
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1797583954702761984 |