Modelling evidence for late Eocene Antarctic glaciations
It is generally believed that a large scale Antarctic ice sheet formed at the Eocene-Oligocene transition (34.44-33.65 Ma). However, oxygen isotope excursions during the late Eocene (38-34 Ma) and geomorphic evidence of glacial erosion suggest that there were ephemeral continental scale glaciations...
Published in: | Earth and Planetary Science Letters |
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Online Access: | https://www.vliz.be/imisdocs/publications/381743.pdf |
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ftvliz:oai:oma.vliz.be:355847 2023-05-15T13:42:51+02:00 Modelling evidence for late Eocene Antarctic glaciations Van Breedam, J. Huybrechts, P. Crucifix, M. 2022 application/pdf https://www.vliz.be/imisdocs/publications/381743.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000819924200002 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.epsl.2022.117532 https://www.vliz.be/imisdocs/publications/381743.pdf info:eu-repo/semantics/openAccess %3Ci%3EEarth+Planet.+Sci.+Lett.+586%3C%2Fi%3E%3A+117532.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.epsl.2022.117532%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.epsl.2022.117532%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2022 ftvliz https://doi.org/10.1016/j.epsl.2022.117532 2022-10-05T22:24:42Z It is generally believed that a large scale Antarctic ice sheet formed at the Eocene-Oligocene transition (34.44-33.65 Ma). However, oxygen isotope excursions during the late Eocene (38-34 Ma) and geomorphic evidence of glacial erosion suggest that there were ephemeral continental scale glaciations before the Oi-1 event. Here, we investigate the Antarctic ice sheet evolution over a multi-million year timescale during the late Eocene up to the early Oligocene with the most recent estimates of carbon dioxide evolution over this time period and different bedrock elevation reconstructions. A novel ice sheet-climate modelling approach is applied where the Antarctic ice sheet model VUB-AISMPALEO is coupled to the emulated climate from HadSM3 using the coupler CLISEMv1.0. Our modelling results show that short-lived continental scale Antarctic glaciation might have occurred during the late Eocene when austral summer insolation reached a minimum in a narrow range of carbon dioxide concentrations. The Antarctic ice sheet first reached the coast in Prydz Bay and later in the Weddell Sea region, supporting the glaciomarine sediments dated prior to the EOT. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Prydz Bay Weddell Sea Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Antarctic The Antarctic Weddell Sea Austral Prydz Bay Weddell Earth and Planetary Science Letters 586 117532 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
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ftvliz |
language |
English |
description |
It is generally believed that a large scale Antarctic ice sheet formed at the Eocene-Oligocene transition (34.44-33.65 Ma). However, oxygen isotope excursions during the late Eocene (38-34 Ma) and geomorphic evidence of glacial erosion suggest that there were ephemeral continental scale glaciations before the Oi-1 event. Here, we investigate the Antarctic ice sheet evolution over a multi-million year timescale during the late Eocene up to the early Oligocene with the most recent estimates of carbon dioxide evolution over this time period and different bedrock elevation reconstructions. A novel ice sheet-climate modelling approach is applied where the Antarctic ice sheet model VUB-AISMPALEO is coupled to the emulated climate from HadSM3 using the coupler CLISEMv1.0. Our modelling results show that short-lived continental scale Antarctic glaciation might have occurred during the late Eocene when austral summer insolation reached a minimum in a narrow range of carbon dioxide concentrations. The Antarctic ice sheet first reached the coast in Prydz Bay and later in the Weddell Sea region, supporting the glaciomarine sediments dated prior to the EOT. |
format |
Article in Journal/Newspaper |
author |
Van Breedam, J. Huybrechts, P. Crucifix, M. |
spellingShingle |
Van Breedam, J. Huybrechts, P. Crucifix, M. Modelling evidence for late Eocene Antarctic glaciations |
author_facet |
Van Breedam, J. Huybrechts, P. Crucifix, M. |
author_sort |
Van Breedam, J. |
title |
Modelling evidence for late Eocene Antarctic glaciations |
title_short |
Modelling evidence for late Eocene Antarctic glaciations |
title_full |
Modelling evidence for late Eocene Antarctic glaciations |
title_fullStr |
Modelling evidence for late Eocene Antarctic glaciations |
title_full_unstemmed |
Modelling evidence for late Eocene Antarctic glaciations |
title_sort |
modelling evidence for late eocene antarctic glaciations |
publishDate |
2022 |
url |
https://www.vliz.be/imisdocs/publications/381743.pdf |
geographic |
Antarctic The Antarctic Weddell Sea Austral Prydz Bay Weddell |
geographic_facet |
Antarctic The Antarctic Weddell Sea Austral Prydz Bay Weddell |
genre |
Antarc* Antarctic Ice Sheet Prydz Bay Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Sheet Prydz Bay Weddell Sea |
op_source |
%3Ci%3EEarth+Planet.+Sci.+Lett.+586%3C%2Fi%3E%3A+117532.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.epsl.2022.117532%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.epsl.2022.117532%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000819924200002 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.epsl.2022.117532 https://www.vliz.be/imisdocs/publications/381743.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2022.117532 |
container_title |
Earth and Planetary Science Letters |
container_volume |
586 |
container_start_page |
117532 |
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1766173453393592320 |