Den snabba issmältningen på Grönland förklaras här med bilder. Vad som händer nu är att det blir en positiv feedback från det isfria vattnet, vilket ökar temperaturen ytterligare.
Greenland Lost 4 Trillion Pounds Of Ice In Just 1 Day
As the heat wave that struck the southeastern United States made its way up to Greenland, the ice-covered island recorded over 2 billion tons of ice melt in just one day.
What Caused The Extreme Melting In Greenland
Melting in Greenland this season began early and strong. This is because there has been a persistent high-pressure ridge along eastern Greenland. This high-pressure ridge is responsible for warm central Atlantic air masses around Greenland and clear, sunny skies.
In addition, the high-pressure front that caused an early season heat wave in the southeastern United States has now made its way to Greenland. These two high-pressure systems combined have led to unusually warm and sunny conditions in Greenland and unusually high melting.
As Greenland ice continues to melt it perpetuates a positive feedback loop. Ice has a high albedo (close to 1), which means it reflects back the vast majority of the sun's solar radiation and with it heat.
You've experienced this if you've walked down the road barefoot on a hot summer day. The black asphalt is much hotter than the white concrete sidewalk. This is due to the difference in how much solar radiation white versus black reflects. Hence, as Greenland melts more of its ice, the surface is converted from a high albedo white to darker colors. This, in turn, causes more melting and adds to the positive feedback loop.
https://www.forbes.com/sites/trevornace/2019/06/18/greenland-lost-4-trillion-pounds-of-ice-in-just-1-day/#19843ab950f9