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The Last Glacial Maximum

Clark, Peter U, Dyke, Arthur S, Shakun, Jeremy D, Carlson, Anders E, Clark, Jorie, Wohlfarth, Barbara, Mitrovica, Jerry X, Hostetler, Steven W and McCabe, A. Marshall (2009) The Last Glacial Maximum. Science, 325 (5941). pp. 710-714. [Journal article]

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DOI: 10.1126/science.1172873


We used 5704 14C, 10Be, and 3He ages that span the interval from 10,000 to 50,000 years ago (10 to 50 ka) to constrain the timing of the Last Glacial Maximum (LGM) in terms of global ice-sheet and mountain-glacier extent. Growth of the ice sheets to their maximum positions occurred between 33.0 and 26.5 ka in response to climate forcing from decreases in northern summer insolation, tropical Pacific sea surface temperatures, and atmospheric CO2. Nearly all ice sheets were at their LGM positions from 26.5 ka to 19 to 20 ka, corresponding to minima in these forcings. The onset of Northern Hemisphere deglaciation 19 to 20 ka was induced by an increase in northern summer insolation, providing the source for an abrupt rise in sea level. The onset of deglaciation of the West Antarctic Ice Sheet occurred between 14 and 15 ka, consistent with evidence that this was the primary source for an abrupt rise in sea level ~14.5 ka.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences > School of Geography and Environmental Sciences
Faculty of Life and Health Sciences
Research Institutes and Groups:Environmental Sciences Research Institute > Quaternary Environmental Change
Environmental Sciences Research Institute
ID Code:23139
Deposited By: Mrs Linda Allen
Deposited On:22 Aug 2012 12:08
Last Modified:19 Sep 2013 10:55

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