Southern Ocean warming and Wilkes Land ice sheet retreat during the mid-Miocene
Observations and model experiments highlight the importance of ocean heat in forcing ice sheet retreat during the present and geological past, but past ocean temperature data are virtually missing in ice sheet proximal locations. Here we document paleoceanographic conditions and the (in)stability of...
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ftmontclairstuni:oai:digitalcommons.montclair.edu:earth-environ-studies-facpubs-1026 2023-07-23T04:14:38+02:00 Southern Ocean warming and Wilkes Land ice sheet retreat during the mid-Miocene Sangiorgi, Francesca Bijl, Peter K. Passchier, Sandra Salzmann, Ulrich Schouten, Stefan McKay, Robert Cody, Rosemary Pross, Jörg Van de Flierdt, Tina Bohaty, Steven M Levy, Richard Williams, Trevor Escutia, Carlota Brinkhuis, Henk 2018-01-22T08:00:00Z https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/28 https://doi.org/10.1038/s41467-017-02609-7 https://www.nature.com/articles/s41467-017-02609-7.pdf unknown Montclair State University Digital Commons https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/28 doi:10.1038/s41467-017-02609-7 https://www.nature.com/articles/s41467-017-02609-7.pdf Department of Earth and Environmental Studies Faculty Scholarship and Creative Works Antarctica IODP deep-sea drilling glacial oceanography climate Earth Sciences Geology text 2018 ftmontclairstuni https://doi.org/10.1038/s41467-017-02609-7 2023-07-03T21:42:04Z Observations and model experiments highlight the importance of ocean heat in forcing ice sheet retreat during the present and geological past, but past ocean temperature data are virtually missing in ice sheet proximal locations. Here we document paleoceanographic conditions and the (in)stability of the Wilkes Land subglacial basin (East Antarctica) during the mid-Miocene (~17–13.4 million years ago) by studying sediment cores from offshore Adélie Coast. Inland retreat of the ice sheet, temperate vegetation, and warm oligotrophic waters characterise the mid-Miocene Climatic Optimum (MCO; 17–14.8 Ma). After the MCO, expansion of a marine-based ice sheet occurs, but remains sensitive to melting upon episodic warm water incursions. Our results suggest that the mid-Miocene latitudinal temperature gradient across the Southern Ocean never resembled that of the present day. We demonstrate that a strong coupling of oceanic climate and Antarctic continental conditions existed and that the East Antarctic subglacial basins were highly sensitive to ocean warming. Text Antarc* Antarctic Antarctica East Antarctica Ice Sheet Southern Ocean Wilkes Land Montclair State University Digital Commons Antarctic Southern Ocean East Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Adélie Coast ENVELOPE(139.000,139.000,-60.000,-60.000) Nature Communications 9 1 |
institution |
Open Polar |
collection |
Montclair State University Digital Commons |
op_collection_id |
ftmontclairstuni |
language |
unknown |
topic |
Antarctica IODP deep-sea drilling glacial oceanography climate Earth Sciences Geology |
spellingShingle |
Antarctica IODP deep-sea drilling glacial oceanography climate Earth Sciences Geology Sangiorgi, Francesca Bijl, Peter K. Passchier, Sandra Salzmann, Ulrich Schouten, Stefan McKay, Robert Cody, Rosemary Pross, Jörg Van de Flierdt, Tina Bohaty, Steven M Levy, Richard Williams, Trevor Escutia, Carlota Brinkhuis, Henk Southern Ocean warming and Wilkes Land ice sheet retreat during the mid-Miocene |
topic_facet |
Antarctica IODP deep-sea drilling glacial oceanography climate Earth Sciences Geology |
description |
Observations and model experiments highlight the importance of ocean heat in forcing ice sheet retreat during the present and geological past, but past ocean temperature data are virtually missing in ice sheet proximal locations. Here we document paleoceanographic conditions and the (in)stability of the Wilkes Land subglacial basin (East Antarctica) during the mid-Miocene (~17–13.4 million years ago) by studying sediment cores from offshore Adélie Coast. Inland retreat of the ice sheet, temperate vegetation, and warm oligotrophic waters characterise the mid-Miocene Climatic Optimum (MCO; 17–14.8 Ma). After the MCO, expansion of a marine-based ice sheet occurs, but remains sensitive to melting upon episodic warm water incursions. Our results suggest that the mid-Miocene latitudinal temperature gradient across the Southern Ocean never resembled that of the present day. We demonstrate that a strong coupling of oceanic climate and Antarctic continental conditions existed and that the East Antarctic subglacial basins were highly sensitive to ocean warming. |
format |
Text |
author |
Sangiorgi, Francesca Bijl, Peter K. Passchier, Sandra Salzmann, Ulrich Schouten, Stefan McKay, Robert Cody, Rosemary Pross, Jörg Van de Flierdt, Tina Bohaty, Steven M Levy, Richard Williams, Trevor Escutia, Carlota Brinkhuis, Henk |
author_facet |
Sangiorgi, Francesca Bijl, Peter K. Passchier, Sandra Salzmann, Ulrich Schouten, Stefan McKay, Robert Cody, Rosemary Pross, Jörg Van de Flierdt, Tina Bohaty, Steven M Levy, Richard Williams, Trevor Escutia, Carlota Brinkhuis, Henk |
author_sort |
Sangiorgi, Francesca |
title |
Southern Ocean warming and Wilkes Land ice sheet retreat during the mid-Miocene |
title_short |
Southern Ocean warming and Wilkes Land ice sheet retreat during the mid-Miocene |
title_full |
Southern Ocean warming and Wilkes Land ice sheet retreat during the mid-Miocene |
title_fullStr |
Southern Ocean warming and Wilkes Land ice sheet retreat during the mid-Miocene |
title_full_unstemmed |
Southern Ocean warming and Wilkes Land ice sheet retreat during the mid-Miocene |
title_sort |
southern ocean warming and wilkes land ice sheet retreat during the mid-miocene |
publisher |
Montclair State University Digital Commons |
publishDate |
2018 |
url |
https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/28 https://doi.org/10.1038/s41467-017-02609-7 https://www.nature.com/articles/s41467-017-02609-7.pdf |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) ENVELOPE(139.000,139.000,-60.000,-60.000) |
geographic |
Antarctic Southern Ocean East Antarctica Wilkes Land Adélie Coast |
geographic_facet |
Antarctic Southern Ocean East Antarctica Wilkes Land Adélie Coast |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Southern Ocean Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Southern Ocean Wilkes Land |
op_source |
Department of Earth and Environmental Studies Faculty Scholarship and Creative Works |
op_relation |
https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/28 doi:10.1038/s41467-017-02609-7 https://www.nature.com/articles/s41467-017-02609-7.pdf |
op_doi |
https://doi.org/10.1038/s41467-017-02609-7 |
container_title |
Nature Communications |
container_volume |
9 |
container_issue |
1 |
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1772186164013301760 |