29 Dec '11, 12pm

The Puzzle of Rising Methane

Josh Haner/The New York Times Methane hot spots on a lake outside Fairbanks, Alaska. In an article the other day about thawing permafrost, I mentioned that no signal had emerged in the atmosphere to suggest a sharp rise in methane emissions from the Arctic. But that does not mean all is stable with methane in the air — quite the contrary, in fact. It’s true that methane was stable for roughly a decade ending in 2006. That apparent stabilization occurred after a long rise in the methane content of the atmosphere related to human activities, so it came as a relief to scientists. They have had a hard time figuring out exactly why it happened, but the 1991 collapse of the Soviet Union and the economic decline of its successor states is assumed to have played a role. For the past four years, however, the methane level has been rising again for reasons that researchers do not fu...

Full article: http://green.blogs.nytimes.com/2011/12/29/the-puzzle-of-r...

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Green Blog: The Puzzle of Rising Methane

green.blogs.nytimes.com 29 Dec '11, 12pm

Josh Haner/The New York Times Methane hot spots on a lake outside Fairbanks, Alaska. In an article the other day about tha...

Green Blog: The Puzzle of Rising Methane

green.blogs.nytimes.com 29 Dec '11, 12pm

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