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Saturday, August 30, 2008 7:14:37 PM

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Swedish researchers confirm Siberian seabead methane leak

Published: 30 Aug 08 11:55 CET

The Local
Sweden's News In English

http://www.thelocal.se/14032/20080830/

Swedish researchers working on an international mission have confirmed that methane, a potent greenhouse gas, has started to leak from the permafrost under the Siberian seabed, Dagens Nyheter reported on Saturday.

"The permafrost now has small holes. We have found elevated levels of methane above the water surface and even more in the water just below. It is obvious that the source is the seabed," Örjan Gustafsson, the Swedish leader of the International Siberian Shelf Study, told the newspaper.

The tests were carried out in the Laptev and east Siberian seas and used much more precise measuring equipment than previous studies, he said.

Methane is more than 20 times more efficient than carbon dioxide in trapping solar heat.

Scientists fear that global warming may cause Siberia's permafrost to thaw and thereby release vast amounts of methane into the atmosphere. The effects of global warming are already most visible in the Arctic region.

The Russia-Swedish expedition appeared to confirm a longer term trend based on readings by Russian researcher Igor Semiletov who first detected higher methane readings at several locations in the region in 2003.

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