In contrast to the Antarctic Peninsula, where evidence of climate warming has been evident in rising temperatures, retreating glaciers, and collapsing ice shelves, the interior of Antarctica has generally appeared to be staying well below freezing. In May 2007, however, a team of researches from NASA and the University of Colorado found evidence of warming and melting as much as 900 kilometers (500 miles) inland. Just 500 kilometers (310 miles) from the South Pole, and more than 2,000 meters (6,600 feet) above sea level, portions of Antarctica’s interior experienced temperatures above freezing for about a week in January 2005.
The areas where snow melted and then refroze as ice over the winter were detected by NASA’s Quick Scatterometer (QuikSCAT). In this image, areas where QuikSCAT detected more ice are red, and places where it detected less ice are yellow. Small patches of yellow and red around the coastline of East Antarctica show that at least some melting took place there, but the most significant amounts of ice formed in West Antarctica. QuikSCAT detected significant amounts of melting along a stretch of the West Antarctic coastline more than 500 kilometers (310 miles) long. Additional evidence of melting appeared as a ring of icy patches surrounding the Ross Ice Shelf.
