Equatorial heat accumulation as a long-term trigger of permanent Antarctic ice sheets during the Cenozoic
International audience The long-term cooling trend of the Cenozoic is punctuated by shorter-term climatic events, such as the inception of permanent ice sheets on Antarctica at the Eocene−Oligocene Transition (∼33.7 Ma). Taking advantage of the excellent state of preservation of coccolith calcite in...
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ftsorbonneuniv:oai:HAL:hal-01376097v1 2023-06-11T04:06:01+02:00 Equatorial heat accumulation as a long-term trigger of permanent Antarctic ice sheets during the Cenozoic Tremblin, Maxime Hermoso, Michaël Minoletti, Fabrice Institut des Sciences de la Terre de Paris (iSTeP) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Department of Earth Sciences Oxford University of Oxford 2016 https://hal.science/hal-01376097 https://hal.science/hal-01376097/document https://hal.science/hal-01376097/file/Tremblin_2016_Equatorial_heat.pdf https://doi.org/10.1073/pnas.1608100113 en eng HAL CCSD National Academy of Sciences info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.1608100113 hal-01376097 https://hal.science/hal-01376097 https://hal.science/hal-01376097/document https://hal.science/hal-01376097/file/Tremblin_2016_Equatorial_heat.pdf doi:10.1073/pnas.1608100113 info:eu-repo/semantics/OpenAccess ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America https://hal.science/hal-01376097 Proceedings of the National Academy of Sciences of the United States of America, 2016, 113 (42), pp.11782-11787. ⟨10.1073/pnas.1608100113⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2016 ftsorbonneuniv https://doi.org/10.1073/pnas.1608100113 2023-05-29T23:48:08Z International audience The long-term cooling trend of the Cenozoic is punctuated by shorter-term climatic events, such as the inception of permanent ice sheets on Antarctica at the Eocene−Oligocene Transition (∼33.7 Ma). Taking advantage of the excellent state of preservation of coccolith calcite in equatorial Atlantic deep-sea cores, we unveil progressive tropical warming in the Atlantic Ocean initiated 4 million years prior to Antarctic glaciation. Warming preceding glaciation may appear counterintuitive, but we argue that this long-term climatic precursor to the EOT reinforced cooling of austral high latitudes via the redistribution of heat at the surface of the oceans. We discuss this new prominent paleoceanographic and climatic feature in the context of overarching pCO2 decline and the establishment of an Antarctic circumpolar current. Article in Journal/Newspaper Antarc* Antarctic Antarctica HAL Sorbonne Université Antarctic Austral Proceedings of the National Academy of Sciences 113 42 11782 11787 |
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Open Polar |
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HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
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[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Tremblin, Maxime Hermoso, Michaël Minoletti, Fabrice Equatorial heat accumulation as a long-term trigger of permanent Antarctic ice sheets during the Cenozoic |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience The long-term cooling trend of the Cenozoic is punctuated by shorter-term climatic events, such as the inception of permanent ice sheets on Antarctica at the Eocene−Oligocene Transition (∼33.7 Ma). Taking advantage of the excellent state of preservation of coccolith calcite in equatorial Atlantic deep-sea cores, we unveil progressive tropical warming in the Atlantic Ocean initiated 4 million years prior to Antarctic glaciation. Warming preceding glaciation may appear counterintuitive, but we argue that this long-term climatic precursor to the EOT reinforced cooling of austral high latitudes via the redistribution of heat at the surface of the oceans. We discuss this new prominent paleoceanographic and climatic feature in the context of overarching pCO2 decline and the establishment of an Antarctic circumpolar current. |
author2 |
Institut des Sciences de la Terre de Paris (iSTeP) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Department of Earth Sciences Oxford University of Oxford |
format |
Article in Journal/Newspaper |
author |
Tremblin, Maxime Hermoso, Michaël Minoletti, Fabrice |
author_facet |
Tremblin, Maxime Hermoso, Michaël Minoletti, Fabrice |
author_sort |
Tremblin, Maxime |
title |
Equatorial heat accumulation as a long-term trigger of permanent Antarctic ice sheets during the Cenozoic |
title_short |
Equatorial heat accumulation as a long-term trigger of permanent Antarctic ice sheets during the Cenozoic |
title_full |
Equatorial heat accumulation as a long-term trigger of permanent Antarctic ice sheets during the Cenozoic |
title_fullStr |
Equatorial heat accumulation as a long-term trigger of permanent Antarctic ice sheets during the Cenozoic |
title_full_unstemmed |
Equatorial heat accumulation as a long-term trigger of permanent Antarctic ice sheets during the Cenozoic |
title_sort |
equatorial heat accumulation as a long-term trigger of permanent antarctic ice sheets during the cenozoic |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-01376097 https://hal.science/hal-01376097/document https://hal.science/hal-01376097/file/Tremblin_2016_Equatorial_heat.pdf https://doi.org/10.1073/pnas.1608100113 |
geographic |
Antarctic Austral |
geographic_facet |
Antarctic Austral |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
ISSN: 0027-8424 EISSN: 1091-6490 Proceedings of the National Academy of Sciences of the United States of America https://hal.science/hal-01376097 Proceedings of the National Academy of Sciences of the United States of America, 2016, 113 (42), pp.11782-11787. ⟨10.1073/pnas.1608100113⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1073/pnas.1608100113 hal-01376097 https://hal.science/hal-01376097 https://hal.science/hal-01376097/document https://hal.science/hal-01376097/file/Tremblin_2016_Equatorial_heat.pdf doi:10.1073/pnas.1608100113 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1073/pnas.1608100113 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
113 |
container_issue |
42 |
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11782 |
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11787 |
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