Click on the image, below, to go to the video of Dr. Waleed Abdalati explaining the processes that are causing Greenland's ice sheet to lose mass.

Waleed Abdalati, Head of NASA's Cryospheric Sciences Branch at the Goddard Space Flight Center (GSFC), explains how Greenland came to be and what would happen if it were to disappear.

The red areas on the graphic at left show the amount of melt which occurred more than three days between May 1 and September 30 for 2007.

Credit: NASA/Goddard Space Flight Center Scientific Visualization Studio

Or go to this link: http://dsc.discovery.com/guides/discovery-earth-live/earth-extras/greenland-ice-melt/greenland-audio.html