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The age of arctic sea ice

: Left: February distribution of ice by its age during normal Arctic conditions (1985-2000 average). Right: February 2008 Arctic ice age distribution. The ice in the Arctic is much younger than normal, with vast regions now covered by first-year ice and much less area covered by multiyear ice. Credit: National Snow and Ice Data Center, courtesy S. Drobot, Univ. of Colorado, Boulder

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