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17 September 2019

Gilkey Glacier Retreat Leads to Rapid Lake Expansion in 2019

Gilkey Glacier in 1984 and 2019 Landsat images indicating retreat of 4300m, tributary separation and 5 km2 lake expansion. A=Terminus tongue, B=Battle Glacier, G=Gilkey Glacier and T=Thiel Glacier. Gilkey Glacier draining the west side of the Juneau Icefield has experienced dramatic changes since I first worked on the glacier in 1981.   The Gilkey Glacier is fed by the famous Vaughan Lewis Icefall at the top of which Juneau Icefield …


23 March 2015

Widespread Retreat Gilkey Glacier System, Alaska

Gilkey Glacier drains the west side of the Juneau Icefield and has experienced widespread significant changes since I first worked on the glacier in 1981.    Here we examine the changes from the August 17, 1984 Landsat 5 image to the August 21, 2014 image from newly launched Landsat 8.  Landsat 5 was launched in 1984, Landsat 8 launched in 2013. The Landsat images have become a key resource in the examination of …


29 May 2011

Gilkey Glacier Ogive Spacing and Retreat

The Gilkey Glacier is a 32 km long outlet glacier flowing west from the Juneau Icefield. From 1948 to 1967 the Gilkey Glacier retreated 600 m and in 1961 a proglacial began to form. By 2005 Gilkey Glacier has retreated 3900 m from the 1948 terminus location. USGS map of Gilkey Glacier from before lake formation.  Google Earth of the developing lake. The glacier is currently terminating in this still …