Wednesday, December 17, 2008

Methane blues

Land ice melting fast, NASA satellite data show

Well, I'm more interested in the last paragraphs, about a couple of papers which I assume will be getting more publicity soon:

Two other studies presented at the conference assess how Arctic thawing is releasing methane - a potent greenhouse gas. One study shows that the loss of sea ice warms the water, which warms the permafrost on nearby land in Alaska, thus producing methane, Stroeve said.

A second study suggests even larger amounts of frozen methane are trapped in lake beds and sea bottoms around Siberia and they are starting to bubble to the surface in some spots in alarming amounts, said Igor Semiletov, a professor at the University of Alaska in Fairbanks. Late last summer, Semiletov found methane bubbling up from parts of the East Siberian Sea and the Laptev Sea at levels 10 times higher than those of the mid-1990s, he said.

The amounts of methane in the region could dramatically increase global warming if they get released, he said. That, Semiletov said, "should alarm people."

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