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shared by Benno Hansen on 07 May 13 - No Cached

shared by Benno Hansen on 17 Dec 08 - Cached

Record melting in northern Greenland and the widespread release of methane gas from formerly frozen deposits off the Siberian coast suggest that major changes are sweeping the Arctic
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The study found methane bubbling up from the seafloor over hundreds of square kilometres in the Laptev and East Siberian Seas
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Water measurements indicate that methane concentrations were up to 200 times higher than the background levels
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The submerged permafrost is on the threshold of melting, and air temperatures in the East Siberian Arctic Shelf have increased by as much as five degrees Celsius over the last decade
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In most summers, temperatures rise enough to permit melting in that region on only 10–15 days on average. But in 2008, the melt period totalled 35 days.
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Estimates based on satellite measurements of the entire ice cap suggest that the island is now losing hundreds of billions of tons of ice each year.
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