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Polychrome photo pair
Photo Credits: Stephen R. Capps (USGS) (1916), R.D. Karpilo (2011)
Ecoregion: Alaska Range Mountains
Change Type: Glacial thinning and retreat
Glacial thinning and retreat
This photo pair shows significant thinning and shrinking of the Polychrome Glaciers and a general increase in vegetation on the river bar draining the middle glacier. Perhaps the smaller size of the glacier has decreased the amount of seasonal runoff, allowing vegetation to colonize previously active channels.