Oldest Arctic sea ice is vanishing

Discussion in 'Weather In The News' started by Mark Blue, Dec 18, 2016.

  1. Mark Blue

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    Sea ice grows throughout the winter and melts throughout the summer, reaching its maximum extent in late February or March, and its minimum extent in September. The ice that survives at least one summer melt season is typically thicker and more likely to survive future summers. Since the 1980s, the amount of this perennial ice (or multiyear) has declined dramatically. Read more...
     
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