For GSS Climate Change chapter 8. Excerpt: A massive iceberg, larger than the city of Chicago, broke off of Antarctica's Pine Island Glacier on Monday (July 8), and is now floating freely in the Amundsen Sea, according to a team of German scientists. The newborn iceberg measures about 278 square miles (720 square kilometers), and was seen by TerraSAR-X, an earth-observing satellite operated by the German Space Agency (DLR). ...Humbert and her colleagues did not draw direct connections between this week's calving event and climate change, ...the flow of the Pine Island Glacier may be driven by other factors, Humbert said. ...whether the flow speeds up or slows down is based more on changing wind directions in the Amundsen Sea, and less by rising air temperatures. ...Still, if the glacier's flow speeds up, it could have serious consequences, the researchers said. The Pine Island Glacier currently acts as a plug, holding back part of the immense West Antarctic Ice Sheet whose melting ice contributes to rising sea levels.... http://www.livescience.com/38078-pine-island-glacier-iceberg.html. Denise Chow, LiveScience.
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