21 May '12, 3pm

Methane sources found bubbling up from melting ice caps #Arctic #methane

21 May 2012: Methane Sources Found Bubbling Up from Melting Ice Caps U.S. scientists report that they have discovered new sources of methane percolating up from underground reservoirs as glaciers, ice caps, and permafrost melt in the Arctic. University of Alaska researchers, conducting aerial and ground surveys, said they have discovered 150,000 methane seeps in Alaska alone near the margins of retreating glaciers or thawing permafrost. In Greenland, the seeps tended to be concentrated around the margins of ice caps that have been retreating for the past 150 years, the scientists said. Katey M. Walter Anthony, lead author of the study, published in the journal Nature Geoscience , said that these seeps in the earth’s frozen zones, or cryosphere, are not currently a major source of methane emissions. But, she added, “As the cryosphere degrades further, it could be a really b...

Full article: http://e360.yale.edu/digest/methane_sources_found__bubbli...

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