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Pingos in Alaska's Arctic
Pingos in Alaska's Arctic
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Description
Pingos are hills that rise abruptly out of flat landscapes of the Alaskan arctic. When lakes dry up, the unfrozen ground that was once protected beneath the lake is exposed and freezes. The ice expands upward, and ping! The result is a pingo. Pingos provide important habitat for foxes and other arctic animals. As permafrost thaws, pingos collapse. NPS scientists are monitoring Alaska's permafrost by mapping landforms like pingos, wedges, and thaw slumps.
Duration
58.542 seconds
Credit
Dave Swanson
Date Created
07/06/2023
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