Phrases with «perennial ice»

It's obviously the wrong time of year to come to any conclusions about recovery from last year's collapse of perennial ice. (planet3.org)
As illustrated in the paper, we can now calculate the ice volume stored in perennial ice and seasonal ice. (dotearth.blogs.nytimes.com)
Just like 2006, more perennial ice melted and some of the 1/2 year ice remained from 2007. (dotearth.blogs.nytimes.com)
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