title: Relative timing of deglacial climate events in Antarctica and Greenland.
abstract: The last deglaciation was marked by large, hemispheric, millennial-scale climate variations: the Bølling-Allerød and Younger Dryas periods in the north, and the Antarctic Cold Reversal in the south. A chronology from the high-accumulation Law Dome East Antarctic ice core constrains the relative timing of these two events and provides strong evidence that the cooling at the start of the Antarctic Cold Reversal did not follow the abrupt warming during the northern Bølling transition around 14,500 years ago. This result suggests that southern changes are not a direct response to abrupt changes in North Atlantic thermohaline circulation, as is assumed in the conventional picture of a hemispheric temperature seesaw.
authors.affiliation: Antarctic Cooperative Research Centre and Australian Antarctic Division, GPO Box 252-80, Hobart, Tasmania, Australia.
authors.forename: Vin
authors.initials: V
authors.lastname: Morgan
authors.forename: Marc
authors.initials: M
authors.lastname: Delmotte
authors.forename: Tas
authors.initials: T
authors.lastname: van Ommen
authors.forename: Jean
authors.initials: J
authors.lastname: Jouzel
authors.forename: Jérôme
authors.initials: J
authors.lastname: Chappellaz
authors.forename: Suenor
authors.initials: S
authors.lastname: Woon
authors.forename: Valérie
authors.initials: V
authors.lastname: Masson-Delmotte
authors.forename: Dominique
authors.initials: D
authors.lastname: Raynaud