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comparison views of Arctic sea ice, Dec. 21, 2004 and Dec. 21, 2005 Arctic Sea Ice
These two views of the Arctic show a shrinking of perennial sea ice, seen in white. The ice, which normally survives the summer melt season and remains year-round, shrunk abruptly by 14 percent between 2004 and 2005. These changes have significant implications for the Arctic environment, navigation and resource exploration.

The data was provided by NASA's QuikScat satellite.

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  Jet Propulsion Laboratory
   California Institute of Technology