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The largest natural increases in atmospheric CO 2 concentration as recorded in ice cores occur when the Earth climate abruptly shifts from a glacial to an interglacial state. Open questions remain regarding the processes at play, the sequences of events and their similarities along different glacial–interglacial transitions. Here we provide new combined data of atmospheric CO 2 and...
Abstract. A new ice core drilled at the Russian station of Vostok in Antarctica reached 2755m depth in September 1993. At this depth, the glaciological time scale provides an age of 260ky BP (25). We refine this estimate using records of dust and deuterium in the ice and of 18O of O2 in the entrapped air. 18O of O2 is highly correlated with insolation over the last two climatic cycles if one assumes...
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