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dc.contributor.authorTurney, Christian S. M.  Concept link
dc.contributor.authorThomas, Zoë  Concept link
dc.contributor.authorHutchinson, David K.  Concept link
dc.contributor.authorBradshaw, Corey J. A.  Concept link
dc.contributor.authorBrook, Barry W.  Concept link
dc.contributor.authorEngland, Matthew H.  Concept link
dc.contributor.authorFogwill, Christopher J.  Concept link
dc.contributor.authorJones, Richard T.  Concept link
dc.contributor.authorPalmer, Jonathan  Concept link
dc.contributor.authorHughen, Konrad A.  Concept link
dc.contributor.authorCooper, Alan  Concept link
dc.date.accessioned2016-02-19T21:24:48Z
dc.date.available2016-06-10T07:44:54Z
dc.date.issued2015-12-10
dc.identifier.citationGeophysical Research Letters 42 (2015): 10,382–10,390en_US
dc.identifier.urihttps://hdl.handle.net/1912/7799
dc.descriptionAuthor Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 42 (2015): 10,382–10,390, doi:10.1002/2015GL066344.en_US
dc.description.abstractNorth Atlantic late Pleistocene climate (60,000 to 11,650 years ago) was characterized by abrupt and extreme millennial duration oscillations known as Dansgaard-Oeschger (D-O) events. However, during the Last Glacial Maximum (LGM) 23,000 to 19,000 cal years ago (23 to 19 ka), no D-O events are observed in the Greenland ice cores. Our new analysis of the Greenland δ18O record reveals a switch in the stability of the climate system around 30 ka, suggesting that a critical threshold was passed. Climate system modeling suggests that low axial obliquity at this time caused vastly expanded sea ice in the Labrador Sea, shifting Northern Hemisphere westerly winds south and reducing the strength of meridional overturning circulation. The results suggest that these feedbacks tipped the climate system into full glacial conditions, leading to maximum continental ice growth during the LGM.en_US
dc.description.sponsorshipAustralian Research Councilen_US
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sonsen_US
dc.relation.urihttps://doi.org/10.1002/2015GL066344
dc.subjectLate Pleistoceneen_US
dc.subjectAbrupt climate changeen_US
dc.subjectGeochronologyen_US
dc.subjectTipping pointen_US
dc.subjectMeridional overturning circulationen_US
dc.subjectGreenland ice coresen_US
dc.titleObliquity-driven expansion of North Atlantic sea ice during the last glacialen_US
dc.typeArticleen_US
dc.description.embargo2016-06-10en_US
dc.identifier.doi10.1002/2015GL066344


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