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Coastal Antarctic Permafrost Melting Faster Than Expected

By Guest PostJuly 25, 2013Environmentandrew fountain, antarctic peninsula, Arctic, arctic like slump, austin, boston university, brown university, coastal antarctic, coastal arctic, david marchant, dry valleys contain, frozen water, garwood valley, ground ice, ice free islands, institute for geophysics, jaclyn watters, james dickson, james head, joseph levy, layers of sediment, lidar, marianne okal, mass, mcmurdo dry valleys, permafrost melting, phenomenon, present geologic epoch, retrogressive thaw slumps, ross sea, scientific reports, section of antarctica, tibet, university of texas, warming antarctic continent, weather station data

AUSTIN, Texas — For the first time, scientists have documented an acceleration in the melt rate of permafrost, or ground ice, in a section of Antarctica where the ice had been considered stable. The melt rates are comparable with the Arctic, where accelerated melting of permafrost has become a regularly recurring phenomenon, and the change could offer a preview of melting permafrost in other parts of a warming Antarctic continent.

Tracking data from Garwood Valley in the McMurdo Dry Valleys region of Antarctica, Joseph Levy, a research associate at The University of Texas at Austin’s Institute for Geophysics, shows that melt rates accelerated consistently from 2001 to 2012, rising to about 10 times the valley’s historical average for the present geologic epoch, as documented in the July 24 edition of Scientific Reports. (more…)

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Coastal Antarctic Permafrost Melting Faster Than Expected