Paleogeographic controls on the onset of the Antarctic circumpolar current
Development of the Antarctic Circumpolar Current (ACC) during the Cenozoic is controversial in terms of timing and its role in major climate transitions. Some propose that the development of the ACC was instrumental in the continental scale glaciation of Antarctica and climate cooling at the Eocene/...
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American Geophysical Union
2013
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ftleedsuniv:oai:eprints.whiterose.ac.uk:80159 2023-05-15T13:41:04+02:00 Paleogeographic controls on the onset of the Antarctic circumpolar current Hill, DJ Haywood, AM Valdes, PJ Francis, JE Lunt, DJ Wade, BS Bowman, VC 2013-10-16 text https://eprints.whiterose.ac.uk/80159/ https://eprints.whiterose.ac.uk/80159/1/Paleogeographic%20controls%20on%20the%20onset%20of%20the%20Antarctic%20circumpolar%20current.pdf https://doi.org/10.1002/grl.50941 en eng American Geophysical Union https://eprints.whiterose.ac.uk/80159/1/Paleogeographic%20controls%20on%20the%20onset%20of%20the%20Antarctic%20circumpolar%20current.pdf Hill, DJ, Haywood, AM, Valdes, PJ et al. (4 more authors) (2013) Paleogeographic controls on the onset of the Antarctic circumpolar current. Geophysical Research Letters, 40 (19). 5199 - 5204. ISSN 0094-8276 Article NonPeerReviewed 2013 ftleedsuniv https://doi.org/10.1002/grl.50941 2023-01-30T21:28:27Z Development of the Antarctic Circumpolar Current (ACC) during the Cenozoic is controversial in terms of timing and its role in major climate transitions. Some propose that the development of the ACC was instrumental in the continental scale glaciation of Antarctica and climate cooling at the Eocene/Oligocene boundary. Here we present climate model results that show that a coherent ACC was not possible during the Oligocene due to Australasian paleogeography, despite deep water connections through the Drake Passage and Tasman Gateway and the initiation of Antarctic glaciation. The simulations of ocean currents compare well to paleoenvironmental records relating to the physical oceanography of the Oligocene and provide a framework for understanding apparently contradictory dating of the initiation of the ACC. We conclude that the northward motion of the Australasian land masses and the reconfiguration of the Tasman Seaway and Drake Passage are necessary preconditions for the formation of a strong, coherent ACC. Article in Journal/Newspaper Antarc* Antarctic Antarctica Drake Passage White Rose Research Online (Universities of Leeds, Sheffield & York) Antarctic The Antarctic Drake Passage Geophysical Research Letters 40 19 5199 5204 |
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Open Polar |
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White Rose Research Online (Universities of Leeds, Sheffield & York) |
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ftleedsuniv |
language |
English |
description |
Development of the Antarctic Circumpolar Current (ACC) during the Cenozoic is controversial in terms of timing and its role in major climate transitions. Some propose that the development of the ACC was instrumental in the continental scale glaciation of Antarctica and climate cooling at the Eocene/Oligocene boundary. Here we present climate model results that show that a coherent ACC was not possible during the Oligocene due to Australasian paleogeography, despite deep water connections through the Drake Passage and Tasman Gateway and the initiation of Antarctic glaciation. The simulations of ocean currents compare well to paleoenvironmental records relating to the physical oceanography of the Oligocene and provide a framework for understanding apparently contradictory dating of the initiation of the ACC. We conclude that the northward motion of the Australasian land masses and the reconfiguration of the Tasman Seaway and Drake Passage are necessary preconditions for the formation of a strong, coherent ACC. |
format |
Article in Journal/Newspaper |
author |
Hill, DJ Haywood, AM Valdes, PJ Francis, JE Lunt, DJ Wade, BS Bowman, VC |
spellingShingle |
Hill, DJ Haywood, AM Valdes, PJ Francis, JE Lunt, DJ Wade, BS Bowman, VC Paleogeographic controls on the onset of the Antarctic circumpolar current |
author_facet |
Hill, DJ Haywood, AM Valdes, PJ Francis, JE Lunt, DJ Wade, BS Bowman, VC |
author_sort |
Hill, DJ |
title |
Paleogeographic controls on the onset of the Antarctic circumpolar current |
title_short |
Paleogeographic controls on the onset of the Antarctic circumpolar current |
title_full |
Paleogeographic controls on the onset of the Antarctic circumpolar current |
title_fullStr |
Paleogeographic controls on the onset of the Antarctic circumpolar current |
title_full_unstemmed |
Paleogeographic controls on the onset of the Antarctic circumpolar current |
title_sort |
paleogeographic controls on the onset of the antarctic circumpolar current |
publisher |
American Geophysical Union |
publishDate |
2013 |
url |
https://eprints.whiterose.ac.uk/80159/ https://eprints.whiterose.ac.uk/80159/1/Paleogeographic%20controls%20on%20the%20onset%20of%20the%20Antarctic%20circumpolar%20current.pdf https://doi.org/10.1002/grl.50941 |
geographic |
Antarctic The Antarctic Drake Passage |
geographic_facet |
Antarctic The Antarctic Drake Passage |
genre |
Antarc* Antarctic Antarctica Drake Passage |
genre_facet |
Antarc* Antarctic Antarctica Drake Passage |
op_relation |
https://eprints.whiterose.ac.uk/80159/1/Paleogeographic%20controls%20on%20the%20onset%20of%20the%20Antarctic%20circumpolar%20current.pdf Hill, DJ, Haywood, AM, Valdes, PJ et al. (4 more authors) (2013) Paleogeographic controls on the onset of the Antarctic circumpolar current. Geophysical Research Letters, 40 (19). 5199 - 5204. ISSN 0094-8276 |
op_doi |
https://doi.org/10.1002/grl.50941 |
container_title |
Geophysical Research Letters |
container_volume |
40 |
container_issue |
19 |
container_start_page |
5199 |
op_container_end_page |
5204 |
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1766145459282247680 |