Sensitivity of paleonutrient tracer distributions and deep-sea circulation to glacial boundary conditions
International audience We use a carbon cycle model coupled to an ocean general circulation model to explore the links between sea surface boundary conditions, the deep-sea circulation, and the distribution of paleonutrient tracers (51•C and Cd/Ca) from Last Glacial Maximum (21,000 B.P.) sediments. A...
Published in: | Paleoceanography |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://hal.archives-ouvertes.fr/hal-02957951 https://hal.archives-ouvertes.fr/hal-02957951/document https://hal.archives-ouvertes.fr/hal-02957951/file/1999PA900002.pdf https://doi.org/10.1029/1999PA900002 |
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ftccsdartic:oai:HAL:hal-02957951v1 2023-05-15T17:30:23+02:00 Sensitivity of paleonutrient tracer distributions and deep-sea circulation to glacial boundary conditions Winguth, A. Archer, D. Duplessy, J.-C. Maier-Reimer, E. Mikolajewicz, U. 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) Paléocéanographie (PALEOCEAN) 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) 1999-06 https://hal.archives-ouvertes.fr/hal-02957951 https://hal.archives-ouvertes.fr/hal-02957951/document https://hal.archives-ouvertes.fr/hal-02957951/file/1999PA900002.pdf https://doi.org/10.1029/1999PA900002 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/1999PA900002 hal-02957951 https://hal.archives-ouvertes.fr/hal-02957951 https://hal.archives-ouvertes.fr/hal-02957951/document https://hal.archives-ouvertes.fr/hal-02957951/file/1999PA900002.pdf doi:10.1029/1999PA900002 info:eu-repo/semantics/OpenAccess ISSN: 0883-8305 Paleoceanography https://hal.archives-ouvertes.fr/hal-02957951 Paleoceanography, American Geophysical Union, 1999, 14 (3), pp.304-323. ⟨10.1029/1999PA900002⟩ [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 1999 ftccsdartic https://doi.org/10.1029/1999PA900002 2021-12-19T00:52:11Z International audience We use a carbon cycle model coupled to an ocean general circulation model to explore the links between sea surface boundary conditions, the deep-sea circulation, and the distribution of paleonutrient tracers (51•C and Cd/Ca) from Last Glacial Maximum (21,000 B.P.) sediments. A glacial flow field with a shallower and 50% reduced North Atlantic overturning circulation generally reproduces the tracer data but cannot explain the strong glacial-interglacial shift in 51•C in the Southern Ocean. Sensitivity experiments with changes of +1 in salinity in the glacial salinity boundary fields show circulation patterns ranging from even stronger than the present day one to nearly a shutdown of the Atlantic deep-sea circulation. Our model results indicate that the overturning in the North Atlantic is linearly related to the zonal wind forcing in the Southern Ocean but with half of the sensitivity of Toggweiler and Samuels [1993]. Atmospheric pCO: appears to be insensitive to changing circulation and sea surface forcing; a tropical cooling of 4øC can only explain 8% of the glacial-interglacial pCO: change documented in ice cores. Article in Journal/Newspaper North Atlantic Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Southern Ocean Paleoceanography 14 3 304 323 |
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 Winguth, A. Archer, D. Duplessy, J.-C. Maier-Reimer, E. Mikolajewicz, U. Sensitivity of paleonutrient tracer distributions and deep-sea circulation to glacial boundary conditions |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience We use a carbon cycle model coupled to an ocean general circulation model to explore the links between sea surface boundary conditions, the deep-sea circulation, and the distribution of paleonutrient tracers (51•C and Cd/Ca) from Last Glacial Maximum (21,000 B.P.) sediments. A glacial flow field with a shallower and 50% reduced North Atlantic overturning circulation generally reproduces the tracer data but cannot explain the strong glacial-interglacial shift in 51•C in the Southern Ocean. Sensitivity experiments with changes of +1 in salinity in the glacial salinity boundary fields show circulation patterns ranging from even stronger than the present day one to nearly a shutdown of the Atlantic deep-sea circulation. Our model results indicate that the overturning in the North Atlantic is linearly related to the zonal wind forcing in the Southern Ocean but with half of the sensitivity of Toggweiler and Samuels [1993]. Atmospheric pCO: appears to be insensitive to changing circulation and sea surface forcing; a tropical cooling of 4øC can only explain 8% of the glacial-interglacial pCO: change documented in ice cores. |
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) Paléocéanographie (PALEOCEAN) 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 |
Winguth, A. Archer, D. Duplessy, J.-C. Maier-Reimer, E. Mikolajewicz, U. |
author_facet |
Winguth, A. Archer, D. Duplessy, J.-C. Maier-Reimer, E. Mikolajewicz, U. |
author_sort |
Winguth, A. |
title |
Sensitivity of paleonutrient tracer distributions and deep-sea circulation to glacial boundary conditions |
title_short |
Sensitivity of paleonutrient tracer distributions and deep-sea circulation to glacial boundary conditions |
title_full |
Sensitivity of paleonutrient tracer distributions and deep-sea circulation to glacial boundary conditions |
title_fullStr |
Sensitivity of paleonutrient tracer distributions and deep-sea circulation to glacial boundary conditions |
title_full_unstemmed |
Sensitivity of paleonutrient tracer distributions and deep-sea circulation to glacial boundary conditions |
title_sort |
sensitivity of paleonutrient tracer distributions and deep-sea circulation to glacial boundary conditions |
publisher |
HAL CCSD |
publishDate |
1999 |
url |
https://hal.archives-ouvertes.fr/hal-02957951 https://hal.archives-ouvertes.fr/hal-02957951/document https://hal.archives-ouvertes.fr/hal-02957951/file/1999PA900002.pdf https://doi.org/10.1029/1999PA900002 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
ISSN: 0883-8305 Paleoceanography https://hal.archives-ouvertes.fr/hal-02957951 Paleoceanography, American Geophysical Union, 1999, 14 (3), pp.304-323. ⟨10.1029/1999PA900002⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/1999PA900002 hal-02957951 https://hal.archives-ouvertes.fr/hal-02957951 https://hal.archives-ouvertes.fr/hal-02957951/document https://hal.archives-ouvertes.fr/hal-02957951/file/1999PA900002.pdf doi:10.1029/1999PA900002 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/1999PA900002 |
container_title |
Paleoceanography |
container_volume |
14 |
container_issue |
3 |
container_start_page |
304 |
op_container_end_page |
323 |
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1766126748096790528 |