Late Quaternary sea ice history in the Indian sector of the Southern Ocean as recorded by diatom assemblages
International audience A Modern Analog Technique (MAT 5 201/31) has been applied to fossil diatom assemblages to provide down-core estimates of February sea-surface temperatures (SSTs) and of sea ice duration over the past 220 000 years at 56 ‡40PS, 160 ‡14PE. At the core location, sea ice progressi...
Published in: | Marine Micropaleontology |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal.science/hal-02105703 https://doi.org/10.1016/S0377-8398(03)00072-0 |
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ftunivnantes:oai:HAL:hal-02105703v1 2023-05-15T13:40:19+02:00 Late Quaternary sea ice history in the Indian sector of the Southern Ocean as recorded by diatom assemblages Crosta, Xavier Sturm, Arne Armand, Leanne Pichon, Jean-Jacques 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) Department of Biological Sciences North Ryde Macquarie University 2004-02 https://hal.science/hal-02105703 https://doi.org/10.1016/S0377-8398(03)00072-0 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/S0377-8398(03)00072-0 hal-02105703 https://hal.science/hal-02105703 doi:10.1016/S0377-8398(03)00072-0 ISSN: 0377-8398 Marine Micropaleontology https://hal.science/hal-02105703 Marine Micropaleontology, 2004, 50 (3-4), pp.209-223. ⟨10.1016/S0377-8398(03)00072-0⟩ Antarctic Ocean Paleoceanography diatoms sea ice [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2004 ftunivnantes https://doi.org/10.1016/S0377-8398(03)00072-0 2023-02-08T07:43:57Z International audience A Modern Analog Technique (MAT 5 201/31) has been applied to fossil diatom assemblages to provide down-core estimates of February sea-surface temperatures (SSTs) and of sea ice duration over the past 220 000 years at 56 ‡40PS, 160 ‡14PE. At the core location, sea ice progression lagged the SST drop by V1 ka at interglacial^glacial transitions, and sea ice retreat was almost synchronous to the SST increase at glacial^interglacial terminations. Sea ice increased continuously during glacial periods to reach its maximum extent at the end of glacial times, although SSTs were almost constant during glacials. This indicates that SSTs are the major parameter determining the advance and retreat of sea ice at transitions, but that the sea ice advance during glacial conditions may be related to positive feedbacks of the ice on albedo, air temperature and meridional wind stress. The strong correlation (r = 0.75) between sea ice duration at the core location and the Vostok CO 2 record argues for a control of Antarctic sea ice extent on atmospheric CO 2 concentration via the modification of the ocean-to-atmosphere gas balance. ß Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Sea ice Southern Ocean Université de Nantes: HAL-UNIV-NANTES Antarctic Antarctic Ocean Indian Southern Ocean Marine Micropaleontology 50 3-4 209 223 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Antarctic Ocean Paleoceanography diatoms sea ice [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
Antarctic Ocean Paleoceanography diatoms sea ice [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Crosta, Xavier Sturm, Arne Armand, Leanne Pichon, Jean-Jacques Late Quaternary sea ice history in the Indian sector of the Southern Ocean as recorded by diatom assemblages |
topic_facet |
Antarctic Ocean Paleoceanography diatoms sea ice [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience A Modern Analog Technique (MAT 5 201/31) has been applied to fossil diatom assemblages to provide down-core estimates of February sea-surface temperatures (SSTs) and of sea ice duration over the past 220 000 years at 56 ‡40PS, 160 ‡14PE. At the core location, sea ice progression lagged the SST drop by V1 ka at interglacial^glacial transitions, and sea ice retreat was almost synchronous to the SST increase at glacial^interglacial terminations. Sea ice increased continuously during glacial periods to reach its maximum extent at the end of glacial times, although SSTs were almost constant during glacials. This indicates that SSTs are the major parameter determining the advance and retreat of sea ice at transitions, but that the sea ice advance during glacial conditions may be related to positive feedbacks of the ice on albedo, air temperature and meridional wind stress. The strong correlation (r = 0.75) between sea ice duration at the core location and the Vostok CO 2 record argues for a control of Antarctic sea ice extent on atmospheric CO 2 concentration via the modification of the ocean-to-atmosphere gas balance. ß |
author2 |
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) Department of Biological Sciences North Ryde Macquarie University |
format |
Article in Journal/Newspaper |
author |
Crosta, Xavier Sturm, Arne Armand, Leanne Pichon, Jean-Jacques |
author_facet |
Crosta, Xavier Sturm, Arne Armand, Leanne Pichon, Jean-Jacques |
author_sort |
Crosta, Xavier |
title |
Late Quaternary sea ice history in the Indian sector of the Southern Ocean as recorded by diatom assemblages |
title_short |
Late Quaternary sea ice history in the Indian sector of the Southern Ocean as recorded by diatom assemblages |
title_full |
Late Quaternary sea ice history in the Indian sector of the Southern Ocean as recorded by diatom assemblages |
title_fullStr |
Late Quaternary sea ice history in the Indian sector of the Southern Ocean as recorded by diatom assemblages |
title_full_unstemmed |
Late Quaternary sea ice history in the Indian sector of the Southern Ocean as recorded by diatom assemblages |
title_sort |
late quaternary sea ice history in the indian sector of the southern ocean as recorded by diatom assemblages |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-02105703 https://doi.org/10.1016/S0377-8398(03)00072-0 |
geographic |
Antarctic Antarctic Ocean Indian Southern Ocean |
geographic_facet |
Antarctic Antarctic Ocean Indian Southern Ocean |
genre |
Antarc* Antarctic Antarctic Ocean Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Ocean Sea ice Southern Ocean |
op_source |
ISSN: 0377-8398 Marine Micropaleontology https://hal.science/hal-02105703 Marine Micropaleontology, 2004, 50 (3-4), pp.209-223. ⟨10.1016/S0377-8398(03)00072-0⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/S0377-8398(03)00072-0 hal-02105703 https://hal.science/hal-02105703 doi:10.1016/S0377-8398(03)00072-0 |
op_doi |
https://doi.org/10.1016/S0377-8398(03)00072-0 |
container_title |
Marine Micropaleontology |
container_volume |
50 |
container_issue |
3-4 |
container_start_page |
209 |
op_container_end_page |
223 |
_version_ |
1766132322030059520 |