Keywords: nps usgs glacier national park glaciernationalpark national park nationalpark national park service nationalparkservice global warming globalwarming climate change climatechange climate glacier glaciers repeat photography repeatphotography science research outdoor 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. USGS Photo. 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. USGS Photo. |