Greenland’s ‘Extreme Melt Event’

‘In a five-day period in July, Greenland experienced an “extreme melt event.” On July 8, about 40 percent of the ice cover had thawed a bit at the surface. Five days later, an estimated 97 percent of the surface area was thawing. Nearly the entire surface of the ice sheet, from the very edges to the very center, saw some thawing…

NASA says that it is normal for Greenland’s ice to melt a bit in the summer; what is abnormal is the extent. Normally, only about half of the ice sheet’s surface sees any melting. This year, that proportion just about doubled. NASA additionally said that its satellites were recording uncharacteristically high temperatures over the island. Those warmer temperatures were brought by a bubble of warm air (a “heat dome”), the latest in a series of such ridges that have moved over Greenland this year.’ (The Atlantic)