The map illustrates just how much warmer temperatures were in the decade (2000-2009) compared to average temperatures recorded between 1951 and 1980 (a common reference period for climate studies). The most extreme warming, shown in red, was in the Arctic. Very few areas saw cooler than average temperatures, shown in blue. Gray areas over parts of the Southern Ocean are places where temperatures were not recorded. The analysis, conducted by the Goddard Institute for Space Studies (GISS) in New York City, is based on temperatures recorded at meteorological (weather) stations around the world and satellite data over the oceans.
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