Since Wednesday the ice sheet sitting over the big Arctic stead, has melted by about eight billion tons a day, twice what folks thought it would be this far into summer.

The melting starts in June and lasts through early September, but this time the melting has stretched farther inland than before.

Ettinish ice sheets can melt swithe fast when the lift heat is high, but warmer sea water is also working away at the ice sheet about the edges.

The Greenland ice sheet, at almost 700,000 fouredge miles, is the twoth biggest stock of freshwater ice on the earth, after Antarctica.

At the speed which the Greenland ice sheet is now melting, sea depth could go up many inches by the end of this yearhundred.  Seaside towns all over the world are already weak against storm flooding, deeper seas will make it all the worse for them while the tide is high.

With a mostly cool start to the Greenland summer, the waning of the ice sheet so far for 2021 is still not too outlandish. Time will tell if the melting slows down.