Data from: Historical retreat of alpine glaciers in the Ahklun Mountains, western Alaska

The Ahklun Mountains support the only extant glaciers in western Alaska.
The glaciers were originally mapped by the U.S. Geological Survey using
photogrammetry methods based on 1972 - 1973 aerial photos. We surveyed for
presence or absence of the glaciers by fixed-wing aircraft in 2006. Of 109
glaciers originally mapped, 10 (9%) had disappeared. Using aerial imagery
of a subset of 76 glaciers at three time steps between 1957 - 2009, we
determined the average rate of areal loss was 45% over 52 years. At this
rate, it is likely that all Ahklun Mountain glaciers will be extinguished
by the end of the current century.