Melt ponds, dust and changes in size and shape of the snow crystals (near center) are making the Greenland ice sheet darker. That leads to more energy being absorbed – more melting …
NASA has a great map showing this – comparing reflectiveness in June – August 2011 to average for same period in 2000 – 2006.
Source http://earthobservatory.nasa.gov/IOTD/view.php?id=76916&src=eorss-iotd
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