Global Cooling during the Eocene-Oligocene Climate Transition
About 34 million years ago, Earth's climate shifted from a relatively ice-free world to one with glacial conditions on Antarctica characterized by substantial ice sheets. How Earth's temperature changed during this climate transition remains poorly understood, and evidence for Northern Hem...
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ftunivmassamh:oai:works.bepress.com:robert_deconto-1073 2023-05-15T13:51:40+02:00 Global Cooling during the Eocene-Oligocene Climate Transition Liu, Zhonghui Pagani, Mark Zinniker, David Deconto, Robert M Huber, Matthew Brinkhuis, Henk Shah, Sunita R Pearson, Ann 2009-02-27T08:00:00Z https://works.bepress.com/robert_deconto/37 http://www.sciencemag.org/content/323/5918/1187.full unknown SelectedWorks https://works.bepress.com/robert_deconto/37 http://www.sciencemag.org/content/323/5918/1187.full Robert M DeConto Earth Sciences text 2009 ftunivmassamh 2022-01-09T20:37:17Z About 34 million years ago, Earth's climate shifted from a relatively ice-free world to one with glacial conditions on Antarctica characterized by substantial ice sheets. How Earth's temperature changed during this climate transition remains poorly understood, and evidence for Northern Hemisphere polar ice is controversial. Here, we report proxy records of sea surface temperatures from multiple ocean localities and show that the high-latitude temperature decrease was substantial and heterogeneous. High-latitude (45 degrees to 70 degrees in both hemispheres) temperatures before the climate transition were ∼20°C and cooled an average of ∼5°C. Our results, combined with ocean and ice-sheet model simulations and benthic oxygen isotope records, indicate that Northern Hemisphere glaciation was not required to accommodate the magnitude of continental ice growth during this time. Text Antarc* Antarctica Ice Sheet University of Massachusetts: ScholarWorks@UMass Amherst |
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University of Massachusetts: ScholarWorks@UMass Amherst |
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ftunivmassamh |
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Earth Sciences |
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Earth Sciences Liu, Zhonghui Pagani, Mark Zinniker, David Deconto, Robert M Huber, Matthew Brinkhuis, Henk Shah, Sunita R Pearson, Ann Global Cooling during the Eocene-Oligocene Climate Transition |
topic_facet |
Earth Sciences |
description |
About 34 million years ago, Earth's climate shifted from a relatively ice-free world to one with glacial conditions on Antarctica characterized by substantial ice sheets. How Earth's temperature changed during this climate transition remains poorly understood, and evidence for Northern Hemisphere polar ice is controversial. Here, we report proxy records of sea surface temperatures from multiple ocean localities and show that the high-latitude temperature decrease was substantial and heterogeneous. High-latitude (45 degrees to 70 degrees in both hemispheres) temperatures before the climate transition were ∼20°C and cooled an average of ∼5°C. Our results, combined with ocean and ice-sheet model simulations and benthic oxygen isotope records, indicate that Northern Hemisphere glaciation was not required to accommodate the magnitude of continental ice growth during this time. |
format |
Text |
author |
Liu, Zhonghui Pagani, Mark Zinniker, David Deconto, Robert M Huber, Matthew Brinkhuis, Henk Shah, Sunita R Pearson, Ann |
author_facet |
Liu, Zhonghui Pagani, Mark Zinniker, David Deconto, Robert M Huber, Matthew Brinkhuis, Henk Shah, Sunita R Pearson, Ann |
author_sort |
Liu, Zhonghui |
title |
Global Cooling during the Eocene-Oligocene Climate Transition |
title_short |
Global Cooling during the Eocene-Oligocene Climate Transition |
title_full |
Global Cooling during the Eocene-Oligocene Climate Transition |
title_fullStr |
Global Cooling during the Eocene-Oligocene Climate Transition |
title_full_unstemmed |
Global Cooling during the Eocene-Oligocene Climate Transition |
title_sort |
global cooling during the eocene-oligocene climate transition |
publisher |
SelectedWorks |
publishDate |
2009 |
url |
https://works.bepress.com/robert_deconto/37 http://www.sciencemag.org/content/323/5918/1187.full |
genre |
Antarc* Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctica Ice Sheet |
op_source |
Robert M DeConto |
op_relation |
https://works.bepress.com/robert_deconto/37 http://www.sciencemag.org/content/323/5918/1187.full |
_version_ |
1766255681535475712 |