Geomagnetic-assisted stratigraphy and sea surface temperature changes in core MD94-103 (Southern Indian Ocean): possible implications for North-South climatic relationships around H4
International audience New records of past sea surface temperatures (SSTs) were derived in the 30-50 kyr B.P. time interval from a core located at 45° S in the Southern Indian Ocean, MD94-103. To investigate the climatic phasing between the Southern Indian Ocean, the Greenland and the Antarctic ice,...
Published in: | Earth and Planetary Science Letters |
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Main Authors: | , , , , , , , , , |
Other Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2002
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Subjects: | |
Online Access: | https://hal.science/hal-01460386 https://doi.org/10.1016/S0012-821X(02)00662-3 |
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ftunivnantes:oai:HAL:hal-01460386v1 |
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openpolar |
institution |
Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
sea-surface temperature climate temperature magnetic properties correlation [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
sea-surface temperature climate temperature magnetic properties correlation [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Mazaud, A. Sicre, Marie-Alexandrine Ezat, Ullah Pichon, J.-J. Duprat, J. Laj, C. Kissel, C. Beaufort, Luc, Michel, E. Turon, Jean-Louis Geomagnetic-assisted stratigraphy and sea surface temperature changes in core MD94-103 (Southern Indian Ocean): possible implications for North-South climatic relationships around H4 |
topic_facet |
sea-surface temperature climate temperature magnetic properties correlation [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience New records of past sea surface temperatures (SSTs) were derived in the 30-50 kyr B.P. time interval from a core located at 45° S in the Southern Indian Ocean, MD94-103. To investigate the climatic phasing between the Southern Indian Ocean, the Greenland and the Antarctic ice, the magnetic signal of core MD94-103 was synchronized at better than millennial accuracy in the vicinity of the Laschamp geomagnetic to a reference record, NAPIS-75, already placed on the GISP2 age model. Coccolithophorid and diatom species abundances both point to a cooling of surface waters during H4. Specific diatoms also indicate lower salinity waters during the same time interval. These observations do not support the idea that the South hemisphere warmed 1.5-2 kyr before the North hemisphere (Nature 394 (1998) 739). Rather, alkenone-derived SSTs suggest that cold conditions have characterized the surface waters in the south latitudes during H4 and H5, and that temperature at evaporation sites contributed to the isotopic events A1 and A2 visible in the isotopic records of central Antarctica (Earth Planet. Sci. Lett. 177 (2000) 219). SSTs obtained from foraminifera assemblages depict somewhat different temperature patterns, possibly indicative of water stratification. |
author2 |
Climat et Magnétisme (CLIMAG) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Paléocéanographie (PALEOCEAN) 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) Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Mazaud, A. Sicre, Marie-Alexandrine Ezat, Ullah Pichon, J.-J. Duprat, J. Laj, C. Kissel, C. Beaufort, Luc, Michel, E. Turon, Jean-Louis |
author_facet |
Mazaud, A. Sicre, Marie-Alexandrine Ezat, Ullah Pichon, J.-J. Duprat, J. Laj, C. Kissel, C. Beaufort, Luc, Michel, E. Turon, Jean-Louis |
author_sort |
Mazaud, A. |
title |
Geomagnetic-assisted stratigraphy and sea surface temperature changes in core MD94-103 (Southern Indian Ocean): possible implications for North-South climatic relationships around H4 |
title_short |
Geomagnetic-assisted stratigraphy and sea surface temperature changes in core MD94-103 (Southern Indian Ocean): possible implications for North-South climatic relationships around H4 |
title_full |
Geomagnetic-assisted stratigraphy and sea surface temperature changes in core MD94-103 (Southern Indian Ocean): possible implications for North-South climatic relationships around H4 |
title_fullStr |
Geomagnetic-assisted stratigraphy and sea surface temperature changes in core MD94-103 (Southern Indian Ocean): possible implications for North-South climatic relationships around H4 |
title_full_unstemmed |
Geomagnetic-assisted stratigraphy and sea surface temperature changes in core MD94-103 (Southern Indian Ocean): possible implications for North-South climatic relationships around H4 |
title_sort |
geomagnetic-assisted stratigraphy and sea surface temperature changes in core md94-103 (southern indian ocean): possible implications for north-south climatic relationships around h4 |
publisher |
HAL CCSD |
publishDate |
2002 |
url |
https://hal.science/hal-01460386 https://doi.org/10.1016/S0012-821X(02)00662-3 |
geographic |
Antarctic Greenland Indian The Antarctic |
geographic_facet |
Antarctic Greenland Indian The Antarctic |
genre |
Antarc* Antarctic Antarctica Greenland |
genre_facet |
Antarc* Antarctic Antarctica Greenland |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-01460386 Earth and Planetary Science Letters, 2002, 201 (1), pp.159-170. ⟨10.1016/S0012-821X(02)00662-3⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/S0012-821X(02)00662-3 hal-01460386 https://hal.science/hal-01460386 doi:10.1016/S0012-821X(02)00662-3 WOS: WOS:000176782800013 |
op_doi |
https://doi.org/10.1016/S0012-821X(02)00662-3 |
container_title |
Earth and Planetary Science Letters |
container_volume |
201 |
container_issue |
1 |
container_start_page |
159 |
op_container_end_page |
170 |
_version_ |
1766259413519171584 |
spelling |
ftunivnantes:oai:HAL:hal-01460386v1 2023-05-15T13:53:56+02:00 Geomagnetic-assisted stratigraphy and sea surface temperature changes in core MD94-103 (Southern Indian Ocean): possible implications for North-South climatic relationships around H4 Mazaud, A. Sicre, Marie-Alexandrine Ezat, Ullah Pichon, J.-J. Duprat, J. Laj, C. Kissel, C. Beaufort, Luc, Michel, E. Turon, Jean-Louis Climat et Magnétisme (CLIMAG) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Paléocéanographie (PALEOCEAN) 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) Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2002-07 https://hal.science/hal-01460386 https://doi.org/10.1016/S0012-821X(02)00662-3 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/S0012-821X(02)00662-3 hal-01460386 https://hal.science/hal-01460386 doi:10.1016/S0012-821X(02)00662-3 WOS: WOS:000176782800013 ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-01460386 Earth and Planetary Science Letters, 2002, 201 (1), pp.159-170. ⟨10.1016/S0012-821X(02)00662-3⟩ sea-surface temperature climate temperature magnetic properties correlation [SDU.STU]Sciences of the Universe [physics]/Earth Sciences [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2002 ftunivnantes https://doi.org/10.1016/S0012-821X(02)00662-3 2023-02-08T09:45:47Z International audience New records of past sea surface temperatures (SSTs) were derived in the 30-50 kyr B.P. time interval from a core located at 45° S in the Southern Indian Ocean, MD94-103. To investigate the climatic phasing between the Southern Indian Ocean, the Greenland and the Antarctic ice, the magnetic signal of core MD94-103 was synchronized at better than millennial accuracy in the vicinity of the Laschamp geomagnetic to a reference record, NAPIS-75, already placed on the GISP2 age model. Coccolithophorid and diatom species abundances both point to a cooling of surface waters during H4. Specific diatoms also indicate lower salinity waters during the same time interval. These observations do not support the idea that the South hemisphere warmed 1.5-2 kyr before the North hemisphere (Nature 394 (1998) 739). Rather, alkenone-derived SSTs suggest that cold conditions have characterized the surface waters in the south latitudes during H4 and H5, and that temperature at evaporation sites contributed to the isotopic events A1 and A2 visible in the isotopic records of central Antarctica (Earth Planet. Sci. Lett. 177 (2000) 219). SSTs obtained from foraminifera assemblages depict somewhat different temperature patterns, possibly indicative of water stratification. Article in Journal/Newspaper Antarc* Antarctic Antarctica Greenland Université de Nantes: HAL-UNIV-NANTES Antarctic Greenland Indian The Antarctic Earth and Planetary Science Letters 201 1 159 170 |