Data from: Historical retreat of alpine glaciers in the Ahklun Mountains, western Alaska
Walsh, Patrick; Kaufman, Darrell; McDaniel, Tess; Chowdhry Beeman, Jai (2015), Data from: Historical retreat of alpine glaciers in the Ahklun Mountains, western Alaska, Dryad, Dataset, https://doi.org/10.5061/dryad.gm2sm
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.