Greenland Ice Sheet (IMAGE) University of Wisconsin-Madison Caption A new study shows clouds are playing a larger role in heating the Greenland Ice Sheet than scientists previously believed, raising its temperature by 2 to 3 degrees compared to cloudless skies and accounting for as much as 30 percent of the ice sheet melt. Credit Hannes Grobe Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.