Groenland is belangrijk omdat het smelten ervan leidt tot een zeespiegelstijging van zes meter. Al Gore We hebben Al Gore er over horen preken (zie zijn praatje in Amsterdam)  Nu heb ik v… //

Greenland is important because its melting leads to a sea level rise of six meters. //

But what does "melt extent" actually mean?
Two weeks ago I had the opportunity to take some current photos of the "terrible melting" in Greenland.

On my way to Canada I flew over the Barklay Bugt in East Greenland, where a glacier flows into the sea.

First you see fields of drift ice ... //

On my way back from Canada, I flew over South Greenland

and here too a clear blue meltwater lake.

I am left with a few questions about Steffen's maps: what is actually the use of the value "surface melt in square kilometers"? How does this compare to cubic kilometers of molten water, a factor that is still very difficult to calculate with an error rate of 10%? Also note that the total melting surface of Steffen is over the period from April to October, a period during which the sun does not set in Greenland. //

Harry van Schalkwyk onDecember 2, 2009 at 1:36 AM
When the Normans were able to establish an agricultural colony on the coast of southern Greenland, most of Greenland's glaciers did not melt, even though it was then warmer for generations than it is now in Greenland.
I saw skeptical climate scientist John R. Christy explain this on youtube adding that they could have found an excellent array of temperature data in the ice that seemed to confirm this warm period in the Middle Ages. See: Time 0: 26.23 file at: // www.youtube.com/watch?v=-WWpH0lmcxA&feature=PlayList&p=762113239C0454FC&playnext=1&playnext_from=PL&index=10