NEW: Central US Winter Storms February 2021 UPDATED: Arctic Amplification UPDATED: Winter Storm Risk Increase Map: Greenland annual melt day anomalies by National Snow and Ice Data Center; Thomas Mote, University of Georgia The maps show the difference from the 1981 to 2010 average number of melt days in 2015, 2014, 2013, and 2012 on the Greenland Ice Sheet. Go to Site Related Events Greenland Ice Sheet Melt 2007 - Related Climate Signals Glacier and Ice Sheet Melt