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...
Published in: | Geoscientific Model Development |
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Online Access: | https://hal.archives-ouvertes.fr/hal-03200226 https://hal.archives-ouvertes.fr/hal-03200226/document https://hal.archives-ouvertes.fr/hal-03200226/file/gmd-3-377-2010.pdf https://doi.org/10.5194/gmd-3-377-2010 |
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ftccsdartic:oai:HAL:hal-03200226v1 2023-05-15T16:35:21+02:00 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. Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Modélisation du climat (CLIM) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) 2010 https://hal.archives-ouvertes.fr/hal-03200226 https://hal.archives-ouvertes.fr/hal-03200226/document https://hal.archives-ouvertes.fr/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.archives-ouvertes.fr/hal-03200226 https://hal.archives-ouvertes.fr/hal-03200226/document https://hal.archives-ouvertes.fr/hal-03200226/file/gmd-3-377-2010.pdf doi:10.5194/gmd-3-377-2010 info:eu-repo/semantics/OpenAccess ISSN: 1991-959X Geoscientific Model Development https://hal.archives-ouvertes.fr/hal-03200226 Geoscientific Model Development, European Geosciences Union, 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 ftccsdartic https://doi.org/10.5194/gmd-3-377-2010 2021-12-19T00:16:27Z 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Hudson Hudson Bay Geoscientific Model Development 3 2 377 389 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
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 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Modélisation du climat (CLIM) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-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)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) |
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.archives-ouvertes.fr/hal-03200226 https://hal.archives-ouvertes.fr/hal-03200226/document https://hal.archives-ouvertes.fr/hal-03200226/file/gmd-3-377-2010.pdf https://doi.org/10.5194/gmd-3-377-2010 |
geographic |
Hudson Hudson Bay |
geographic_facet |
Hudson Hudson Bay |
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: 1991-959X Geoscientific Model Development https://hal.archives-ouvertes.fr/hal-03200226 Geoscientific Model Development, European Geosciences Union, 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.archives-ouvertes.fr/hal-03200226 https://hal.archives-ouvertes.fr/hal-03200226/document https://hal.archives-ouvertes.fr/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 |
container_start_page |
377 |
op_container_end_page |
389 |
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1766025572202315776 |