Wednesday, July 25, 2012

Greenland's Ice Sheet No More

Record temperatures have been breaking out across the world this summer. As thermometers rise we are seeing the affects through extreme weather and an increase in ice melting. According to an article in the New York Times:
In a scant four days this month, the surface of Greenland’s ice sheet melted to an extent not witnessed in 30 years of satellite observations, NASA reported on Tuesday.
The extent of Greenland’s ice sheet surface, in white, on July 8, left, and July 12, right, based on measurements from three satellites, which pass over at different times and whose data are combined and analyzed. The deepest pink areas reflect maximal certainty that the ice has melted.
On average, about half of the surface of the ice sheet melts during the summer. But from July 8 to July 12, the ice melt expanded from 40 percent of the ice sheet to 97 percent, according to scientists who analyzed the data fromsatellites deployed by NASA and India’s space research institute.
A blog about energy and the environment.
“I started looking at the satellite imagery and saw something that was really unprecedented” since the advent of satellite imaging of the earth’s frozen surface, or cryosphere, said Thomas L. Mote, a climate scientist at the University of Georgia who for 20 years has been studying ice changes on Greenland detected by satellite.
While scientists described it as an “extreme event” not previously recorded from space, they hastened to add that it was normal in a broader historical context.

Although this melting has been seen before, it remains to be seen just how well this ice will return. It is also a great reminder to us that many glaciers and ice sheets have been melting at increased rates, and we need to take action before it is too late. 

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