Mid-latitude Southern Indian Ocean response to Northern Hemisphere Heinrich events
International audience The lack of temporal resolution and accurate chronology of Southern Ocean marine cores has hampered comparison of glacial millennial-scale oscillations between the Southern Ocean, Antarctic ice and other records from both hemispheres. In this study, glacial climate variability...
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
2005
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Subjects: | |
Online Access: | https://hal.science/hal-03427303 https://hal.science/hal-03427303/document https://hal.science/hal-03427303/file/Sicre-EPSL%23419-annotated.pdf https://doi.org/10.1016/j.epsl.2005.09.032 |
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EPHE (Ecole pratique des hautes études, Paris): HAL |
op_collection_id |
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language |
English |
topic |
glacial climate Southern Indian Ocean alkenones foraminifera [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
spellingShingle |
glacial climate Southern Indian Ocean alkenones foraminifera [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Sicre, Marie-Alexandrine Labeyrie, Laurent Ezat, Ullah Duprat, Josette Turon, Jean-Louis Schmidt, Sabine Michel, Elisabeth Mazaud, Alain Mid-latitude Southern Indian Ocean response to Northern Hemisphere Heinrich events |
topic_facet |
glacial climate Southern Indian Ocean alkenones foraminifera [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
description |
International audience The lack of temporal resolution and accurate chronology of Southern Ocean marine cores has hampered comparison of glacial millennial-scale oscillations between the Southern Ocean, Antarctic ice and other records from both hemispheres. In this study, glacial climate variability is investigated over the last 50 ka using a multi-proxy approach. A precise chrono-stratigraphy was developed on the high-sedimentation rate core MD94-103 (Indian Southern Ocean, 45°35′S 86°31′E, 3560 m water depth) by geomagnetic synchronization between the later core and NAPIS75, and 14C dates. High-resolution time-series of δ18O in planktonic foraminifera Globigerina bulloides and Neogloboquadrina pachyderma, and sea surface temperatures (SSTs) estimated from the alkenone UK′37 index and foraminifera assemblages have been generated. Temporal evolution of the two temperature proxy records is notably different during the last glacial period. While foraminifera data indicate a consistent cooling towards the last glacial maximum, anomalous warm glacial alkenone temperatures suggest a strong advection of 〈warm〉 “detrital” alkenones by surface waters of the Agulhas current. Superimposed to this general trend, during Heinrich events, foraminiferal SSTs point to warmer surface waters, while concurrent alkenone SSTs exhibit apparent coolings probably caused by enhanced local alkenone production. By analogy to modern observations, possible influence of ENSO-like conditions on the subantarctic Southern Ocean SSTs is discussed. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) 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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) 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) Climat et Magnétisme (CLIMAG) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) |
format |
Article in Journal/Newspaper |
author |
Sicre, Marie-Alexandrine Labeyrie, Laurent Ezat, Ullah Duprat, Josette Turon, Jean-Louis Schmidt, Sabine Michel, Elisabeth Mazaud, Alain |
author_facet |
Sicre, Marie-Alexandrine Labeyrie, Laurent Ezat, Ullah Duprat, Josette Turon, Jean-Louis Schmidt, Sabine Michel, Elisabeth Mazaud, Alain |
author_sort |
Sicre, Marie-Alexandrine |
title |
Mid-latitude Southern Indian Ocean response to Northern Hemisphere Heinrich events |
title_short |
Mid-latitude Southern Indian Ocean response to Northern Hemisphere Heinrich events |
title_full |
Mid-latitude Southern Indian Ocean response to Northern Hemisphere Heinrich events |
title_fullStr |
Mid-latitude Southern Indian Ocean response to Northern Hemisphere Heinrich events |
title_full_unstemmed |
Mid-latitude Southern Indian Ocean response to Northern Hemisphere Heinrich events |
title_sort |
mid-latitude southern indian ocean response to northern hemisphere heinrich events |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-03427303 https://hal.science/hal-03427303/document https://hal.science/hal-03427303/file/Sicre-EPSL%23419-annotated.pdf https://doi.org/10.1016/j.epsl.2005.09.032 |
geographic |
Antarctic Indian Southern Ocean |
geographic_facet |
Antarctic Indian Southern Ocean |
genre |
Antarc* Antarctic Neogloboquadrina pachyderma Planktonic foraminifera Southern Ocean |
genre_facet |
Antarc* Antarctic Neogloboquadrina pachyderma Planktonic foraminifera Southern Ocean |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-03427303 Earth and Planetary Science Letters, 2005, 240 (3-4), pp.724-731. ⟨10.1016/j.epsl.2005.09.032⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2005.09.032 hal-03427303 https://hal.science/hal-03427303 https://hal.science/hal-03427303/document https://hal.science/hal-03427303/file/Sicre-EPSL%23419-annotated.pdf doi:10.1016/j.epsl.2005.09.032 WOS: 000234132000014 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2005.09.032 |
container_title |
Earth and Planetary Science Letters |
container_volume |
240 |
container_issue |
3-4 |
container_start_page |
724 |
op_container_end_page |
731 |
_version_ |
1801383528654438400 |
spelling |
ftecolephe:oai:HAL:hal-03427303v1 2024-06-09T07:40:01+00:00 Mid-latitude Southern Indian Ocean response to Northern Hemisphere Heinrich events Sicre, Marie-Alexandrine Labeyrie, Laurent Ezat, Ullah Duprat, Josette Turon, Jean-Louis Schmidt, Sabine Michel, Elisabeth Mazaud, Alain Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) 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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) 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) Climat et Magnétisme (CLIMAG) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) 2005 https://hal.science/hal-03427303 https://hal.science/hal-03427303/document https://hal.science/hal-03427303/file/Sicre-EPSL%23419-annotated.pdf https://doi.org/10.1016/j.epsl.2005.09.032 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2005.09.032 hal-03427303 https://hal.science/hal-03427303 https://hal.science/hal-03427303/document https://hal.science/hal-03427303/file/Sicre-EPSL%23419-annotated.pdf doi:10.1016/j.epsl.2005.09.032 WOS: 000234132000014 info:eu-repo/semantics/OpenAccess ISSN: 0012-821X Earth and Planetary Science Letters https://hal.science/hal-03427303 Earth and Planetary Science Letters, 2005, 240 (3-4), pp.724-731. ⟨10.1016/j.epsl.2005.09.032⟩ glacial climate Southern Indian Ocean alkenones foraminifera [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry info:eu-repo/semantics/article Journal articles 2005 ftecolephe https://doi.org/10.1016/j.epsl.2005.09.032 2024-05-16T10:56:29Z International audience The lack of temporal resolution and accurate chronology of Southern Ocean marine cores has hampered comparison of glacial millennial-scale oscillations between the Southern Ocean, Antarctic ice and other records from both hemispheres. In this study, glacial climate variability is investigated over the last 50 ka using a multi-proxy approach. A precise chrono-stratigraphy was developed on the high-sedimentation rate core MD94-103 (Indian Southern Ocean, 45°35′S 86°31′E, 3560 m water depth) by geomagnetic synchronization between the later core and NAPIS75, and 14C dates. High-resolution time-series of δ18O in planktonic foraminifera Globigerina bulloides and Neogloboquadrina pachyderma, and sea surface temperatures (SSTs) estimated from the alkenone UK′37 index and foraminifera assemblages have been generated. Temporal evolution of the two temperature proxy records is notably different during the last glacial period. While foraminifera data indicate a consistent cooling towards the last glacial maximum, anomalous warm glacial alkenone temperatures suggest a strong advection of 〈warm〉 “detrital” alkenones by surface waters of the Agulhas current. Superimposed to this general trend, during Heinrich events, foraminiferal SSTs point to warmer surface waters, while concurrent alkenone SSTs exhibit apparent coolings probably caused by enhanced local alkenone production. By analogy to modern observations, possible influence of ENSO-like conditions on the subantarctic Southern Ocean SSTs is discussed. Article in Journal/Newspaper Antarc* Antarctic Neogloboquadrina pachyderma Planktonic foraminifera Southern Ocean EPHE (Ecole pratique des hautes études, Paris): HAL Antarctic Indian Southern Ocean Earth and Planetary Science Letters 240 3-4 724 731 |