Tuesday, July 31, 2012

Satellites See Unprecedented Greenland Ice Sheet Surface Melt

For several days in July, Greenland’s surface ice cover melted over a larger area than at any time in more than 30 years of satellite observations. Nearly the entire ice cover of Greenland, from its thin, low-lying coastal edges to its two-mile-thick center, experienced some degree of melting at its surface, according to measurements from three independent satellites analyzed by NASA and university scientists. On average in the summer, about half of the surface of Greenland’s ice sheet naturally melts. According to satellite data, an estimated 97% of the ice sheet surface thawed at some point in mid-July. Read more »