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"      Thanks to some imaging equipment, NASA finally has a comprehensive view of Greenland&amp;#039;s troubled ice sheet. By unraveling the history, we can learn more about what we might expect as Greenland&amp;#039;s ice sheet melts away thanks to climate change. Operation IceBridge saw aircraft fly over the frigid island, scanning the terrain below with radar that determined the depth of the ice layers by measuring the strength and time of the signal&amp;#039;s return. The result is a study that goes deeper than any other and could be compared with ice core samples to build a comprehensive picture of Greenland&amp;#039;s climate over time. By studying the thickness and depths of ice over time, scientists can study the age of the ice and estimate what effect global climate change may have on the ice sheet over time by examining past warming and cooling cycles. Specifically, researchers want to study the Eemian Period, around 115,000 to 130,000 years ago when temperatures were close to ours today. Source: Deep Stuff. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.popularmechanics.com/science/environment/a13736/nasa-operation-icebridge-greenland-glaciers/>