07/25/12
Greenland Ice Sheet Melting
According to NASA, an unusually strong ridge of relatively warm air – hovering just above freezing for several hours at the highest elevation — rapidly accelerated melting this month, and satellites showed that an estimated 97% of the surface had melted at some point by July 12. In an average summer, melting happens on about half of the surface of Greenland’s ice sheet, which covers most of the land and is an average 1 mile thick.
Source: http://news.blogs.cnn.com/2012/07/25/satellites-reveal-rare-levels-of-greenland-ice-melt