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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ftsouthampton:oai:eprints.soton.ac.uk:417624 2024-05-12T07:56:40+00:00 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 D. Pross, Jörg Van De Flierdt, Tina Bohaty, Steven M. Levy, Richard Williams, Trevor Escutia, Carlota Brinkhuis, Henk 2018-01-22 text https://eprints.soton.ac.uk/417624/ https://eprints.soton.ac.uk/417624/1/s41467_017_02609_7.pdf en English eng https://eprints.soton.ac.uk/417624/1/s41467_017_02609_7.pdf Sangiorgi, Francesca, Bijl, Peter K., Passchier, Sandra, Salzmann, Ulrich, Schouten, Stefan, McKay, Robert, Cody, Rosemary D., Pross, Jörg, Van De Flierdt, Tina, Bohaty, Steven M., 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), [317]. (doi:10.1038/s41467-017-02609-7 <http://dx.doi.org/10.1038/s41467-017-02609-7>). cc_by_4 Article PeerReviewed 2018 ftsouthampton https://doi.org/10.1038/s41467-017-02609-7 2024-04-17T14:05:16Z 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 University of Southampton: e-Prints Soton 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 |
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Open Polar |
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University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
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 K. Passchier, Sandra Salzmann, Ulrich Schouten, Stefan McKay, Robert Cody, Rosemary D. Pross, Jörg Van De Flierdt, Tina Bohaty, Steven M. Levy, Richard Williams, Trevor Escutia, Carlota Brinkhuis, Henk |
spellingShingle |
Sangiorgi, Francesca Bijl, Peter K. Passchier, Sandra Salzmann, Ulrich Schouten, Stefan McKay, Robert Cody, Rosemary D. 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 |
author_facet |
Sangiorgi, Francesca Bijl, Peter K. Passchier, Sandra Salzmann, Ulrich Schouten, Stefan McKay, Robert Cody, Rosemary D. 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 |
publishDate |
2018 |
url |
https://eprints.soton.ac.uk/417624/ https://eprints.soton.ac.uk/417624/1/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://eprints.soton.ac.uk/417624/1/s41467_017_02609_7.pdf Sangiorgi, Francesca, Bijl, Peter K., Passchier, Sandra, Salzmann, Ulrich, Schouten, Stefan, McKay, Robert, Cody, Rosemary D., Pross, Jörg, Van De Flierdt, Tina, Bohaty, Steven M., 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), [317]. (doi:10.1038/s41467-017-02609-7 <http://dx.doi.org/10.1038/s41467-017-02609-7>). |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.1038/s41467-017-02609-7 |
container_title |
Nature Communications |
container_volume |
9 |
container_issue |
1 |
_version_ |
1798836860467806208 |