Each
spring and summer, as the air warms up and the sunlight beats down on
the Greenland ice sheet, sapphire-colored ponds spring up like swimming
pools. As snow and ice melt atop the glaciers, the water flows in
channels and streams and collects in depressions on the surface that are
sometimes visible from space. These melt ponds and lakes sometimes
disappear quickly - a phenomenon that scientists have observed firsthand
in recent years.
The natural-color image above was acquired on
July 4, 2010, by the Advanced Land Imager on NASA’s Earth Observing-1
(EO-1) satellite. This glacial ice field lies in southwestern Greenland,
not far from Disko Bay (Disko Bugt in Danish) and Davis Strait. The
center of the image is 68.91° North latitude and 48.54° West longitude. › Read More
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