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A vast expanse of permafrost in Siberia and Alaska has started to thaw for the first time since it formed 11,000 years ago, marked in dark blue on the map. It is caused by the recent 3+°C rise in local temperature over the past 40 years - more than four times the global average. Peat bogs cover an area of a million square miles (or almost a quarter of the earth's land surface) to a depth of 25 meters.
Originally posted by FlySolo
reply to post by survivalstation
Sure I know. But it's escaping from permafrost.
A vast expanse of permafrost in Siberia and Alaska has started to thaw for the first time since it formed 11,000 years ago, marked in dark blue on the map. It is caused by the recent 3+°C rise in local temperature over the past 40 years - more than four times the global average. Peat bogs cover an area of a million square miles (or almost a quarter of the earth's land surface) to a depth of 25 meters.
edit on 11-3-2012 by FlySolo because: (no reason given)