Changes 'amplify Arctic warming'

Scientists say they now have unambiguous evidence that the warming in the Arctic is accelerating. Computer models have long predicted that decreasing sea ice should amplify temperature changes in the northern polar region. Julienne Stroeve from the US National Snow and Ice Data Center told a meeting of the American Geophysical Union that this process was under way. Arctic ice cover in summer has seen rapid retreat in recent years. The minimum extents reached in 2007 and 2008 were the smallest recorded in the satellite age.
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