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...
Published in: | Nature Communications |
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Online Access: | https://nrl.northumbria.ac.uk/id/eprint/33726/ https://doi.org/10.1038/s41467-017-02609-7 https://nrl.northumbria.ac.uk/id/eprint/33726/1/s41467-017-02609-7.pdf |
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:33726 2023-05-15T13:56:54+02:00 Southern Ocean warming and Wilkes Land ice sheet retreat during the mid-Miocene Sangiorgi, Francesca Bijl, Peter Passchier, Sandra Salzmann, Ulrich Schouten, Stefan McKay, Robert Cody, Rosemary Pross, Jörg van de Flierdt, Tina Bohaty, Steven Levy, Richard Williams, Trevor Escutia, Carlota Brinkhuis, Henk 2018-01-22 text https://nrl.northumbria.ac.uk/id/eprint/33726/ https://doi.org/10.1038/s41467-017-02609-7 https://nrl.northumbria.ac.uk/id/eprint/33726/1/s41467-017-02609-7.pdf en eng Nature Publishing https://nrl.northumbria.ac.uk/id/eprint/33726/1/s41467-017-02609-7.pdf Sangiorgi, Francesca, Bijl, Peter, Passchier, Sandra, Salzmann, Ulrich, Schouten, Stefan, McKay, Robert, Cody, Rosemary, Pross, Jörg, van de Flierdt, Tina, Bohaty, Steven, Levy, Richard, Williams, Trevor, Escutia, Carlota and Brinkhuis, Henk (2018) Southern Ocean warming and Wilkes Land ice sheet retreat during the mid-Miocene. Nature Communications, 9 (1). p. 317. ISSN 2041-1723 cc_by_4_0 CC-BY F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2018 ftunivnorthumb https://doi.org/10.1038/s41467-017-02609-7 2022-09-25T06:06:57Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Southern Ocean Wilkes Land Northumbria University, Newcastle: Northumbria Research Link (NRL) Adélie Coast ENVELOPE(139.000,139.000,-60.000,-60.000) Antarctic East Antarctica Southern Ocean Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Nature Communications 9 1 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences Sangiorgi, Francesca Bijl, Peter Passchier, Sandra Salzmann, Ulrich Schouten, Stefan McKay, Robert Cody, Rosemary Pross, Jörg van de Flierdt, Tina Bohaty, Steven Levy, Richard Williams, Trevor Escutia, Carlota Brinkhuis, Henk Southern Ocean warming and Wilkes Land ice sheet retreat during the mid-Miocene |
topic_facet |
F700 Ocean Sciences F800 Physical and Terrestrial Geographical and Environmental Sciences |
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 |
Article in Journal/Newspaper |
author |
Sangiorgi, Francesca Bijl, Peter Passchier, Sandra Salzmann, Ulrich Schouten, Stefan McKay, Robert Cody, Rosemary Pross, Jörg van de Flierdt, Tina Bohaty, Steven Levy, Richard Williams, Trevor Escutia, Carlota Brinkhuis, Henk |
author_facet |
Sangiorgi, Francesca Bijl, Peter Passchier, Sandra Salzmann, Ulrich Schouten, Stefan McKay, Robert Cody, Rosemary Pross, Jörg van de Flierdt, Tina Bohaty, Steven 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 |
Nature Publishing |
publishDate |
2018 |
url |
https://nrl.northumbria.ac.uk/id/eprint/33726/ https://doi.org/10.1038/s41467-017-02609-7 https://nrl.northumbria.ac.uk/id/eprint/33726/1/s41467-017-02609-7.pdf |
long_lat |
ENVELOPE(139.000,139.000,-60.000,-60.000) ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Adélie Coast Antarctic East Antarctica Southern Ocean Wilkes Land |
geographic_facet |
Adélie Coast Antarctic East Antarctica Southern Ocean Wilkes Land |
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_relation |
https://nrl.northumbria.ac.uk/id/eprint/33726/1/s41467-017-02609-7.pdf Sangiorgi, Francesca, Bijl, Peter, Passchier, Sandra, Salzmann, Ulrich, Schouten, Stefan, McKay, Robert, Cody, Rosemary, Pross, Jörg, van de Flierdt, Tina, Bohaty, Steven, Levy, Richard, Williams, Trevor, Escutia, Carlota and Brinkhuis, Henk (2018) Southern Ocean warming and Wilkes Land ice sheet retreat during the mid-Miocene. Nature Communications, 9 (1). p. 317. ISSN 2041-1723 |
op_rights |
cc_by_4_0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41467-017-02609-7 |
container_title |
Nature Communications |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766264490308927488 |