Variations of the Antarctic Circumpolar Current intensity during the past 500 ka
International audience [1] We examine the past variations of the Antarctic Circumpolar Current (ACC) by using variations in size and abundance of the magnetic grains deposited by this current at a site east the Kerguelen-Crozet plateau. Core MD00-2375G was taken at a midlatitude site during the ANTA...
Published in: | Geochemistry, Geophysics, Geosystems |
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Main Authors: | , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2010
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-02913796 https://hal.archives-ouvertes.fr/hal-02913796/document https://hal.archives-ouvertes.fr/hal-02913796/file/2010GC003033.pdf https://doi.org/10.1029/2010GC003033 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
Components: 4200 words 7 figures Keywords: Antarctic current past cycles Index Terms: 1512 Geomagnetism and Paleomagnetism: Environmental magnetism 1635 Global Change: Oceans (1616 3305 4215 4513) [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
Components: 4200 words 7 figures Keywords: Antarctic current past cycles Index Terms: 1512 Geomagnetism and Paleomagnetism: Environmental magnetism 1635 Global Change: Oceans (1616 3305 4215 4513) [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Mazaud, A. Michel, E. Dewilde, F. TURON, J. Variations of the Antarctic Circumpolar Current intensity during the past 500 ka |
topic_facet |
Components: 4200 words 7 figures Keywords: Antarctic current past cycles Index Terms: 1512 Geomagnetism and Paleomagnetism: Environmental magnetism 1635 Global Change: Oceans (1616 3305 4215 4513) [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience [1] We examine the past variations of the Antarctic Circumpolar Current (ACC) by using variations in size and abundance of the magnetic grains deposited by this current at a site east the Kerguelen-Crozet plateau. Core MD00-2375G was taken at a midlatitude site during the ANTAUS cruise conducted in 2000 by the French R/V Marion Dufresne. Marine isotope stages (MIS) down to MIS 13 are identified, and an age model is derived from a correlation to the ice core isotopic record obtained from EPICA in Antarctica. Continuous records of abundance and size of the magnetic grains were obtained using environmental magnetism methods. Results show a strong modulation of the ACC flow intensity in response to glacial and interglacial cycles. The low abundance and the small size of magnetic grains indicate that the ACC was weak during warm stages and strong during glacial epochs. A large modulation is also observed at the sub-stage scale during the interglacials. A minimum in concentration and grain size occurs at the onset of MIS 11. At the MIS 6-5, 10-9, and possibly 12-11 transitions, observed variations suggest a mechanism involving both rapid and progressive variations of the ACC flow at deglaciations. |
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) Climat et Magnétisme (CLIMAG) 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) Paléocéanographie (PALEOCEAN) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-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 |
Mazaud, A. Michel, E. Dewilde, F. TURON, J. |
author_facet |
Mazaud, A. Michel, E. Dewilde, F. TURON, J. |
author_sort |
Mazaud, A. |
title |
Variations of the Antarctic Circumpolar Current intensity during the past 500 ka |
title_short |
Variations of the Antarctic Circumpolar Current intensity during the past 500 ka |
title_full |
Variations of the Antarctic Circumpolar Current intensity during the past 500 ka |
title_fullStr |
Variations of the Antarctic Circumpolar Current intensity during the past 500 ka |
title_full_unstemmed |
Variations of the Antarctic Circumpolar Current intensity during the past 500 ka |
title_sort |
variations of the antarctic circumpolar current intensity during the past 500 ka |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.archives-ouvertes.fr/hal-02913796 https://hal.archives-ouvertes.fr/hal-02913796/document https://hal.archives-ouvertes.fr/hal-02913796/file/2010GC003033.pdf https://doi.org/10.1029/2010GC003033 |
geographic |
Antarctic Kerguelen The Antarctic |
geographic_facet |
Antarctic Kerguelen The Antarctic |
genre |
Antarc* Antarctic Antarctica EPICA ice core |
genre_facet |
Antarc* Antarctic Antarctica EPICA ice core |
op_source |
ISSN: 1525-2027 EISSN: 1525-2027 Geochemistry, Geophysics, Geosystems https://hal.archives-ouvertes.fr/hal-02913796 Geochemistry, Geophysics, Geosystems, AGU and the Geochemical Society, 2010, 11 (8), pp.n/a-n/a. ⟨10.1029/2010GC003033⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2010GC003033 hal-02913796 https://hal.archives-ouvertes.fr/hal-02913796 https://hal.archives-ouvertes.fr/hal-02913796/document https://hal.archives-ouvertes.fr/hal-02913796/file/2010GC003033.pdf doi:10.1029/2010GC003033 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2010GC003033 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
11 |
container_issue |
8 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1766261139486801920 |
spelling |
ftccsdartic:oai:HAL:hal-02913796v1 2023-05-15T13:54:56+02:00 Variations of the Antarctic Circumpolar Current intensity during the past 500 ka Mazaud, A. Michel, E. Dewilde, F. TURON, J. 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) Climat et Magnétisme (CLIMAG) 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) Paléocéanographie (PALEOCEAN) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-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) 2010-08 https://hal.archives-ouvertes.fr/hal-02913796 https://hal.archives-ouvertes.fr/hal-02913796/document https://hal.archives-ouvertes.fr/hal-02913796/file/2010GC003033.pdf https://doi.org/10.1029/2010GC003033 en eng HAL CCSD AGU and the Geochemical Society info:eu-repo/semantics/altIdentifier/doi/10.1029/2010GC003033 hal-02913796 https://hal.archives-ouvertes.fr/hal-02913796 https://hal.archives-ouvertes.fr/hal-02913796/document https://hal.archives-ouvertes.fr/hal-02913796/file/2010GC003033.pdf doi:10.1029/2010GC003033 info:eu-repo/semantics/OpenAccess ISSN: 1525-2027 EISSN: 1525-2027 Geochemistry, Geophysics, Geosystems https://hal.archives-ouvertes.fr/hal-02913796 Geochemistry, Geophysics, Geosystems, AGU and the Geochemical Society, 2010, 11 (8), pp.n/a-n/a. ⟨10.1029/2010GC003033⟩ Components: 4200 words 7 figures Keywords: Antarctic current past cycles Index Terms: 1512 Geomagnetism and Paleomagnetism: Environmental magnetism 1635 Global Change: Oceans (1616 3305 4215 4513) [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/10.1029/2010GC003033 2021-12-19T00:52:16Z International audience [1] We examine the past variations of the Antarctic Circumpolar Current (ACC) by using variations in size and abundance of the magnetic grains deposited by this current at a site east the Kerguelen-Crozet plateau. Core MD00-2375G was taken at a midlatitude site during the ANTAUS cruise conducted in 2000 by the French R/V Marion Dufresne. Marine isotope stages (MIS) down to MIS 13 are identified, and an age model is derived from a correlation to the ice core isotopic record obtained from EPICA in Antarctica. Continuous records of abundance and size of the magnetic grains were obtained using environmental magnetism methods. Results show a strong modulation of the ACC flow intensity in response to glacial and interglacial cycles. The low abundance and the small size of magnetic grains indicate that the ACC was weak during warm stages and strong during glacial epochs. A large modulation is also observed at the sub-stage scale during the interglacials. A minimum in concentration and grain size occurs at the onset of MIS 11. At the MIS 6-5, 10-9, and possibly 12-11 transitions, observed variations suggest a mechanism involving both rapid and progressive variations of the ACC flow at deglaciations. Article in Journal/Newspaper Antarc* Antarctic Antarctica EPICA ice core Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Kerguelen The Antarctic Geochemistry, Geophysics, Geosystems 11 8 n/a n/a |