Harrison Glacier
| Harrison Glacier | |
|---|---|
 Harrison Glacier
Location in Montana
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| Type | Mountain glacier |
| Location | Glacier National Park, Flathead County, Montana, United States |
| Coordinates | 48°35′34″N 113°43′49″W / 48.59278°N 113.73028°WCoordinates: 48°35′34″N 113°43′49″W / 48.59278°N 113.73028°W |
| Area | 466 acres (189 ha) in 2005 |
| Length | .50 mi (0.80 km) |
| Terminus | Barren rock/talus |
| Status | Retreating |
Harrison Glacier is located in the US state of Montana in Glacier National Park. Situated on a southeast facing ridge immediately south of Mount Jackson, Harrison Glacier is the largest glacier in Glacier National Park and was estimated in 2005 to have an area of 466 acres (1.89 km2). Though many experts have stated that all the glaciers in Glacier National Park may disappear by the year 2030, Harrison Glacier lost only 9 percent of its surface area in the 40-year period between 1966 and 2005 and will likely still exist well beyond 2030. Compared to many of the vanishing glaciers in Glacier National Park, Harrison Glacier has a much higher altitude accumulation zone (approximately 9,000 feet (2,700 m)) which has allowed it to maintain some equilibrium in its glacier mass balance. Comparing images of the glacier taken in 1913 with those from 2009, indicates that the glacier has experienced thinning and retreat.
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