Rain Driven By Receding Ice Sheets as a Cause of Past Climate Change

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Rain Driven By Receding Ice Sheets as a Cause of Past Climate Change

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dc.contributor.author Eisenman, Ian
dc.contributor.author Bitz, Cecilia M.
dc.contributor.author Tziperman, Eli
dc.date.accessioned 2009-12-21T18:36:39Z
dc.date.issued 2009
dc.identifier.citation Eisenman, Ian, Cecilia Bitz, and Eli Tziperman. 2009. Rain driven by receding ice sheets as a cause of past climate change. Paleoceanography, 24(PA4209): 1-12. en_US
dc.identifier.issn 0883-8305 en_US
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:3445989
dc.description.abstract The Younger Dryas cold period, which interrupted the transition from the last ice age to modern conditions in Greenland, is one of the most dramatic incidents of abrupt climate change reconstructed from paleoclimate proxy records. Changes in the Atlantic Ocean overturning circulation in response to freshwater fluxes from melting ice are frequently invoked to explain this and other past climate changes. Here we propose an alternative mechanism in which the receding glacial ice sheets cause the atmospheric circulation to enter a regime with greater net precipitation in the North Atlantic region. This leads to a significant reduction in ocean overturning circulation, causing an increase in sea ice extent and hence colder temperatures. Positive feedbacks associated with sea ice amplify the cooling. We support the proposed mechanism with the results of a state-of-the-art global climate model. Our results suggest that the atmospheric precipitation response to receding glacial ice sheets could have contributed to the Younger Dryas cooling, as well as to other past climate changes involving the ocean overturning circulation. en_US
dc.description.sponsorship Earth and Planetary Sciences en_US
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.isversionof doi:10.1029/2009PA001778 en_US
dc.relation.hasversion http://www.gps.caltech.edu/~ian/publications/Eisenman-Bitz-Tziperman-2009.pdf en_US
dash.license META_ONLY
dc.title Rain Driven By Receding Ice Sheets as a Cause of Past Climate Change en_US
dc.type Journal Article en_US
dc.description.version Version of Record en_US
dc.relation.journal Paleoceanography en_US
dash.depositing.author Tziperman, Eli
dash.embargo.until 10000-01-01

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  • FAS Scholarly Articles [7213]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

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