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November 27, 2017
Alsek Glacier, Alaska Retreat & Glacier Separation
Alsek Glacier in a 1984 Landsat image and 2017 Sentinel image. Red arrows indicate 1984 terminus, yellow arrows 2017 terminus location, pink arrows tributaries that joined the glacier in 1984 and purple dots the snowline. AR=Alsek River, G=Gateway Knob and P=Prow Knob. Alsek Glacier descends from the Fairweather Range terminating in Alsek Lake on the coastal plain. The glacier terminated at Gateway Knob (G) near the outlet of Alsek River …