Arctic ice more vulnerable than ever

Ocean’s ice cap is smaller than long-term average and thinnest yet as melt season begins

6:01pm, April 6, 2009

The spring melting of the Arctic Ocean’s ice cap has already begun, and data suggest that the ice is more vulnerable than ever: The ocean area covered by ice is one of the lowest ever measured by satellites, and a record high fraction of that area is capped by thin, first-year ice that’s more prone to melt than older, thicker ice is.

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