Joel T. Harper

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The crew of scientists prepare to put the drill stem into the Greenland ice sheet to probe water flows about a half of a mile below. Joel Harper

Scientist at work: Tracking melt water under the Greenland ice sheet

Joel T. Harper, University of Montana

A glaciologist develops a lightweight method for probing the depths of Greenland’s ice sheet to answer a crucial question: How fast is it melting?

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