The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity
International audience The mechanism triggering centennial-tomillennial-scale variability of the Atlantic Meridional Overturning Circulation (AMOC) in the earth system model of intermediate complexity LOVECLIM is investigated. It is found that for several climate boundary conditions such as low obli...
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Online Access: | https://hal.science/hal-03200226 https://hal.science/hal-03200226/document https://hal.science/hal-03200226/file/gmd-3-377-2010.pdf https://doi.org/10.5194/gmd-3-377-2010 |
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ftuniversailles:oai:HAL:hal-03200226v1 2024-04-28T08:23:15+00:00 The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity Friedrich, T. Timmermann, A. Menviel, L. Elison Timm, O. Mouchet, A. Roche, Didier M. University of Hawaii Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) Université de Liège 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)) 2010 https://hal.science/hal-03200226 https://hal.science/hal-03200226/document https://hal.science/hal-03200226/file/gmd-3-377-2010.pdf https://doi.org/10.5194/gmd-3-377-2010 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/gmd-3-377-2010 hal-03200226 https://hal.science/hal-03200226 https://hal.science/hal-03200226/document https://hal.science/hal-03200226/file/gmd-3-377-2010.pdf doi:10.5194/gmd-3-377-2010 info:eu-repo/semantics/OpenAccess ISSN: 1991-9603 EISSN: 1991-959X Geoscientific Model Development https://hal.science/hal-03200226 Geoscientific Model Development, 2010, 3 (2), pp.377-389. ⟨10.5194/gmd-3-377-2010⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2010 ftuniversailles https://doi.org/10.5194/gmd-3-377-2010 2024-04-04T17:34:31Z International audience The mechanism triggering centennial-tomillennial-scale variability of the Atlantic Meridional Overturning Circulation (AMOC) in the earth system model of intermediate complexity LOVECLIM is investigated. It is found that for several climate boundary conditions such as low obliquity values (∼22.1 •) or LGM-albedo, internally generated centennial-to-millennial-scale variability occurs in the North Atlantic region. Stochastic excitations of the density-driven overturning circulation in the Nordic Seas can create regional sea-ice anomalies and a subsequent reorganization of the atmospheric circulation. The resulting remote atmospheric anomalies over the Hudson Bay can release freshwater pulses into the Labrador Sea and significantly increase snow fall in this region leading to a subsequent reduction of convective activity. The millennial-scale AMOC oscillations disappear if LGM bathymetry (with closed Hudson Bay) is prescribed or if freshwater pulses are suppressed artificially. Furthermore, our study documents the process of the AMOC recovery as well as the global marine and terrestrial carbon cycle response to centennial-to-millennial-scale AMOC variability. Article in Journal/Newspaper Hudson Bay Labrador Sea Nordic Seas North Atlantic Sea ice Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Geoscientific Model Development 3 2 377 389 |
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.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Friedrich, T. Timmermann, A. Menviel, L. Elison Timm, O. Mouchet, A. Roche, Didier M. The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The mechanism triggering centennial-tomillennial-scale variability of the Atlantic Meridional Overturning Circulation (AMOC) in the earth system model of intermediate complexity LOVECLIM is investigated. It is found that for several climate boundary conditions such as low obliquity values (∼22.1 •) or LGM-albedo, internally generated centennial-to-millennial-scale variability occurs in the North Atlantic region. Stochastic excitations of the density-driven overturning circulation in the Nordic Seas can create regional sea-ice anomalies and a subsequent reorganization of the atmospheric circulation. The resulting remote atmospheric anomalies over the Hudson Bay can release freshwater pulses into the Labrador Sea and significantly increase snow fall in this region leading to a subsequent reduction of convective activity. The millennial-scale AMOC oscillations disappear if LGM bathymetry (with closed Hudson Bay) is prescribed or if freshwater pulses are suppressed artificially. Furthermore, our study documents the process of the AMOC recovery as well as the global marine and terrestrial carbon cycle response to centennial-to-millennial-scale AMOC variability. |
author2 |
University of Hawaii Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) Université de Liège 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)) |
format |
Article in Journal/Newspaper |
author |
Friedrich, T. Timmermann, A. Menviel, L. Elison Timm, O. Mouchet, A. Roche, Didier M. |
author_facet |
Friedrich, T. Timmermann, A. Menviel, L. Elison Timm, O. Mouchet, A. Roche, Didier M. |
author_sort |
Friedrich, T. |
title |
The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
title_short |
The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
title_full |
The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
title_fullStr |
The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
title_full_unstemmed |
The mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
title_sort |
mechanism behind internally generated centennial-to-millennial scale climate variability in an earth system model of intermediate complexity |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-03200226 https://hal.science/hal-03200226/document https://hal.science/hal-03200226/file/gmd-3-377-2010.pdf https://doi.org/10.5194/gmd-3-377-2010 |
genre |
Hudson Bay Labrador Sea Nordic Seas North Atlantic Sea ice |
genre_facet |
Hudson Bay Labrador Sea Nordic Seas North Atlantic Sea ice |
op_source |
ISSN: 1991-9603 EISSN: 1991-959X Geoscientific Model Development https://hal.science/hal-03200226 Geoscientific Model Development, 2010, 3 (2), pp.377-389. ⟨10.5194/gmd-3-377-2010⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/gmd-3-377-2010 hal-03200226 https://hal.science/hal-03200226 https://hal.science/hal-03200226/document https://hal.science/hal-03200226/file/gmd-3-377-2010.pdf doi:10.5194/gmd-3-377-2010 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/gmd-3-377-2010 |
container_title |
Geoscientific Model Development |
container_volume |
3 |
container_issue |
2 |
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377 |
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389 |
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1797584324670783488 |