Thawing permafrost a significant source of carbon

FOR IMMEDIATE RELEASE
15 June 2006

FAIRBANKS, Alaska -- Permafrost, permanently frozen soil, isn’t staying frozen and a type of soil called loess contained deep within thawing permafrost may be releasing significant, and previously unaccounted for, amounts of carbon into the atmosphere, according to authors of a paper published this week in the journal Science.

Preliminary assessments by scientists from Russia, the University of Florida, and the University of Alaska Fairbanks indicate that loess permafrost, which covers more than a million square kilometers in Siberia and Alaska, is a large carbon reservoir with the potential to be a significant contributor of atmospheric carbon, yet it is seldom incorporated into analyses of changes in global carbon reservoirs.