Digging snow pits on a glacier gives scientists valuable information on not only the amount of snow falling in the high country of Glacier National Park, but also can be used to estimate the rate of glacial retreat due to our changing climate. data from a Sperry Glacier snow pit.

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Keywords: .., america, american, change, climate, conservation, country, glacier, glaciers, global, history, land, lands, montana, national, natural, nature, nps, park, parks, photography, preserve, public, repeat, research, science, service, usa, usgs, warming, widlife, wilderness