ScienceDaily: How do ice sheets melt in places where surface conditions are too cold for melting? Glaciers in the McMurdo Dry Valley rarely are observed to be actively melting, yet runoff from these glaciers feeds streams, lakes, and associated ecosystems in the valleys, which are among the coldest and driest ecosystems on Earth. The processes generating melt under these marginal conditions are not well understood, and traditional melt modeling techniques are inadequate to explain the observed runoff. Using ice…

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