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Permafrost Perma-Emergency
Posted on September 12, 2008
A new study in the journal Bioscience finds permafrost holds twice as much greenhouse gas [ark moreark] as previously thought, and that release of even a fraction would accelerate climate change dramatically . Covering some one fifth of the Earth's land surface, permafrost [search] is permanently frozen land, defined as soil that has remained below zero degrees C for at least two years. Permafrost was found to hold some 1,500 gigatonnes of carbon dioxide and methane, double what is currently held in the atmosphere. Of all potential climate change positive feedback loops [search], skyrocketi...
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