Climate Central: After a cool spring kept Greenland's massive ice sheet mostly solid, a (comparatively) warm late June and early July have turned half the ice sheet's surface into liquid, well outside the range of normal for this time of year.
Despite the ice sheet's remote location, its slushy fingers reach across the globe, influencing sea levels and how fast the Gulf Stream current moves. As temperatures rise, its influence could grow larger as major summer melt events become regular occurrence. Recent warming...