Could deep subantarctic convection feed the world deep basins during the Last Glacial Maximum?
International audience Simple box model calculations are used to simulate the oceanic circulation during the last glacial maximum (LGM). These experiments show that the main features of the 1513C and A14C distributions and of the lysocline depth may be explained by a circulation pattern very differe...
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1995
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Online Access: | https://hal.science/hal-02913417 https://hal.science/hal-02913417/document https://hal.science/hal-02913417/file/ark%20_67375_WNG-DR09514G-H.pdf https://doi.org/10.1029/95PA00978 |
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ftunivnantes:oai:HAL:hal-02913417v1 2023-05-15T17:32:24+02:00 Could deep subantarctic convection feed the world deep basins during the Last Glacial Maximum? Michel, Elisabeth Labeyrie, Laurent Duplessy, Jean-Claude Gorfti, Nabila Labracherie, Monique Turon, Jean-Louis Centre des Faibles Radioactivités Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) 1995-10 https://hal.science/hal-02913417 https://hal.science/hal-02913417/document https://hal.science/hal-02913417/file/ark%20_67375_WNG-DR09514G-H.pdf https://doi.org/10.1029/95PA00978 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/95PA00978 hal-02913417 https://hal.science/hal-02913417 https://hal.science/hal-02913417/document https://hal.science/hal-02913417/file/ark%20_67375_WNG-DR09514G-H.pdf doi:10.1029/95PA00978 info:eu-repo/semantics/OpenAccess ISSN: 0883-8305 Paleoceanography https://hal.science/hal-02913417 Paleoceanography, 1995, 10 (5), pp.927-941. ⟨10.1029/95PA00978⟩ [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 1995 ftunivnantes https://doi.org/10.1029/95PA00978 2023-02-08T04:52:35Z International audience Simple box model calculations are used to simulate the oceanic circulation during the last glacial maximum (LGM). These experiments show that the main features of the 1513C and A14C distributions and of the lysocline depth may be explained by a circulation pattern very different from the modem one. Intermediate and upper deep waters were produced in the North Atlantic Ocean, whereas deep waters of Subantarctic Mode type, forming at the northern edge of the Subantarctic convergence, invaded the main oceanic basins. The Southern Ocean, mainly self ventilated, had a reduced deep component that flew southward along the East Pacific Ridge and the Australian west cost. The thermodynamic fractionation that occurs during air-sea exchange has only contributed slightly to the glacial deep 1513C distribution through surface water temperature variations. Article in Journal/Newspaper North Atlantic Southern Ocean Université de Nantes: HAL-UNIV-NANTES Pacific Southern Ocean Paleoceanography 10 5 927 941 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
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 Michel, Elisabeth Labeyrie, Laurent Duplessy, Jean-Claude Gorfti, Nabila Labracherie, Monique Turon, Jean-Louis Could deep subantarctic convection feed the world deep basins during the Last Glacial Maximum? |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Simple box model calculations are used to simulate the oceanic circulation during the last glacial maximum (LGM). These experiments show that the main features of the 1513C and A14C distributions and of the lysocline depth may be explained by a circulation pattern very different from the modem one. Intermediate and upper deep waters were produced in the North Atlantic Ocean, whereas deep waters of Subantarctic Mode type, forming at the northern edge of the Subantarctic convergence, invaded the main oceanic basins. The Southern Ocean, mainly self ventilated, had a reduced deep component that flew southward along the East Pacific Ridge and the Australian west cost. The thermodynamic fractionation that occurs during air-sea exchange has only contributed slightly to the glacial deep 1513C distribution through surface water temperature variations. |
author2 |
Centre des Faibles Radioactivités Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Michel, Elisabeth Labeyrie, Laurent Duplessy, Jean-Claude Gorfti, Nabila Labracherie, Monique Turon, Jean-Louis |
author_facet |
Michel, Elisabeth Labeyrie, Laurent Duplessy, Jean-Claude Gorfti, Nabila Labracherie, Monique Turon, Jean-Louis |
author_sort |
Michel, Elisabeth |
title |
Could deep subantarctic convection feed the world deep basins during the Last Glacial Maximum? |
title_short |
Could deep subantarctic convection feed the world deep basins during the Last Glacial Maximum? |
title_full |
Could deep subantarctic convection feed the world deep basins during the Last Glacial Maximum? |
title_fullStr |
Could deep subantarctic convection feed the world deep basins during the Last Glacial Maximum? |
title_full_unstemmed |
Could deep subantarctic convection feed the world deep basins during the Last Glacial Maximum? |
title_sort |
could deep subantarctic convection feed the world deep basins during the last glacial maximum? |
publisher |
HAL CCSD |
publishDate |
1995 |
url |
https://hal.science/hal-02913417 https://hal.science/hal-02913417/document https://hal.science/hal-02913417/file/ark%20_67375_WNG-DR09514G-H.pdf https://doi.org/10.1029/95PA00978 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
ISSN: 0883-8305 Paleoceanography https://hal.science/hal-02913417 Paleoceanography, 1995, 10 (5), pp.927-941. ⟨10.1029/95PA00978⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/95PA00978 hal-02913417 https://hal.science/hal-02913417 https://hal.science/hal-02913417/document https://hal.science/hal-02913417/file/ark%20_67375_WNG-DR09514G-H.pdf doi:10.1029/95PA00978 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/95PA00978 |
container_title |
Paleoceanography |
container_volume |
10 |
container_issue |
5 |
container_start_page |
927 |
op_container_end_page |
941 |
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1766130501781815296 |