EXTENT OF ICE COVER IN THE ARCTIC OCEAN
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FIGURE 14.22 In September 2012 the extent of ice on the Arctic Ocean reached a record low of less than 4 million km2, far below the previous record low in 2007 and 45% lower than the average minimum ice cover during the period from 1979 to 2000. (From National Snow and Ice Data Center, Boulder, Colorado, http://nsidc.org/)
(NASA/Goddard Space Flight Center Scientific Visualization Studio)