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You are browsing the archive for chickamin glacier retreat Archives - AGU Blogosphere.

20 May 2019

Chickamin Glacier, Alaska Retreat Generates Separation and Lake Expansion

Chickamin Glacier, Alaska in 1985 and 2018 Landsat images indicating the 3.5 km retreat and associated lake expansion. Red arrow is 1985 terminus location, yellow arrow is the 2018 terminus location, pink arrow is former junction area with Through Glacier.  The purple dots indicate the snowline.  Point 1 and 2 are locations of bedrock expansion above the equilibrium line altitude.  Chickamin Glacier in southeast Alaska glacier drains south from an …

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16 February 2015

Chickamin Glacier Retreat, North Cascade Range, Washington

Chickamin Glacier covers the north slope of Sinister Peak in the North Cascade Range of Washington.  The glacier has a valley tongue that descends to an outwash plain.  Here we examine retreat of the glacier from 1979 to 2012. The glacier had advanced from 1955-1975, before commencing retreat. Chickamin Glacier (John Scurlock  2004 Aerial shot, https://pbase.com/nolock/image/49374401) USGS Map of Chickamin Glacier In 1979 the glacier terminus was at the pink …

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12 June 2011

Chickamin Glacier, Alaska Extensive Retreat

Chickamin Glacier in southeast Alaska has undergone a 3 kilometer retreat since 1955. The glacier drains south from an icefield near Portland Canal and straddling the border with British Columbia. The glacier ended on an outwash plain in 1955 at 250 meters. The Through Glacier at this time is a large tributary feeder joining Chickamin at the elbow where it turns west, (bottom image) Shortly thereafter a lake began to …

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