Historical retreat of alpine glaciers in the ahklun mountains, western Alaska

Patrick Walsh, Darrell S Kaufman, Tess McDaniel, Jai Chowdhry Beeman

Research output: Contribution to journalArticle

Abstract

The Ahklun Mountains support the only extant glaciers in southwestern Alaska north of the Alaska Peninsula. 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 and 2009, we determined the average rate of areal loss was 45% over 52 y. At this rate, it is likely that all Ahklun Mountain glaciers will be extinguished by the end of the current century.

Original languageEnglish (US)
Pages (from-to)255-263
Number of pages9
JournalJournal of Fish and Wildlife Management
Volume6
Issue number1
DOIs
StatePublished - 2015

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Keywords

  • Ahklun mountains
  • Alaska
  • Glaciers
  • Recession

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Nature and Landscape Conservation

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