Cornucopia of ice core results
Article Abstract:
Ice-core drilling at Vostok station in Antarctica reached a record depth of 3,623 mt in 1998. This has made it possible to extend the most significant records contained in large polar ice sheets to four climatic cycles, or around 420,000 years before present. In particular, analysis of the core permits investigation of whether shifts from glacial epochs to interglacials, and vice versa, always take place according to the same pattern. Analyses of polar ice cores play a significant role in boosting understanding of the mechanisms that control global climate change.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Stabilists strike again
Article Abstract:
D. E. Sugden and colleagues have claimed that glacier ice in the largest ice-free area in East Antarctica's Dry valleys is eight million years old and exists under a thin layer of sediment. According to them, this is further evidence for the persistence of stable conditions in the region and the stability of the East Antarctica ice sheet. Previous geomorphological research, based on radiometric ages, has testified that the landscape of the Dry valleys of East Antarctica may have remained unchanged for 15 million years.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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Unblocking of the Nares Strait by Greenland and Ellesmere ice-sheet retreat 10,000 years ago
Article Abstract:
The extent of glaciation of the northern region of the Canadian/Greenland high-latitude Arctic region during the past 30,000 years is not certain. Measurements of cosmogenic (super36)C1 accumulated in situ in erratics and glacially polished bedrock on Nares Strait islands, enable the time for which the rocks have been recently exposed to the atmosphere to be determined. Greenland and Ellesmere ice sheets are shown to have retreated about 10,000 years ago from the Nares Strait.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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