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Pastimes : Pastrami on Rye
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To: Mike McFarland who wrote (264)4/19/2008 6:52:26 PM
From: Mike McFarland  Read Replies (1) of 379
 
The ice is a relic, stranded out of time. And relics are fragile. The question is, how fragile?
nature.com

One route to understanding may be through palaeoclimate studies. Dahl-Jensen is leading a team that aims to drill a core 2,500 metres into the ice of northwestern Greenland over the next couple of summers. This core — the North Greenland Eemian Ice Drilling — would complement the pioneering climate records cored out of Greenland's ice over the past couple of decades. None of the earlier cores was able to extract an unbroken record of the Eemian stage, some 120,000 years ago and the last time that Earth was in a warm 'interglacial' period. Understanding what Greenland was like then could help scientists understand how the ice sheet might respond in a warmed future, says Dahl-Jensen. Temperatures in Greenland were roughly 5 °C higher during the Eemian than they are today. Yet sea level was only one or two metres higher, and every ice core that has ever been drilled deep enough on the island has included some ice from the Eemian. “A major part of the Greenland ice sheet survived,” says Dahl-Jensen — and argues that more sampling of this period might help to pinpoint the factors that could allow ice to stick around when temperatures are higher than today.
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