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You are browsing the archive for alaska glacier retreat Archives - From a Glacier's Perspective.

September 25, 2017

Field Glacier, Alaska Retreat, Leads to Glacier Separation

Field Glacier in Landsat images from 1984, 2013 and 2017.  The red arrow indicates the 1984 terminus, the yellow arrows the 2013 terminus and the yellow dots the 2017 terminus.  The purple arrows indicate developing lateral margin lakes in 2013 and purple dots the transient snowline. The Field Glacier flows from the northwest side of the Juneau Icefield, and is named for Alaskan glaciologist and American Geographical Society leader William …

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July 20, 2017

Ellsworth Glacier Retreat & Lake Expansion, Alaska

Ellsworth Glacier in 1989 and 2016 Landsat images.  Upper yellow arrow marks the west terminus in 2016 and the lower yellow the 2016 east margin.  Purple dots mark the snowline and purple arrows tributaries from the east that are thinning and disconnecting.  Orange arrow marks icebergs in the lake.  Ellsworth Glacier is a valley glacier draining south from Sargent Icefield on the Kenai Peninsula in Alaska. Along with the Excelsior Glacier it …

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July 6, 2017

Pedersen Glacier, Alaska Rapid Retreat 1994-2015

Pedersen Glacier Kenia Peninsula, Alaska retreat from Landsat images in 1994 and 2016. The red arrow indicates 1994 terminus, yellow arrow is 2016 terminus, orange arrow indicates northern tributary and purple dots indicates snowline.  Pedersen Glacier is an outlet glacier of the Harding Icefield in Kenai Fjords National Park near Seward, Alaska. The glacier drops quickly from the plateau of the icefield through a pair of icefalls terminating in a …

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April 26, 2017

Fasset Glacier, Alaska Retreats from Tanis Lake

Fasset Glacier in 1987 and 2016 Landsat images.  Red arrow indicates glacier front in 1987, pink arrows indicates areas where glacier retreat has exposed rock/bare ground and purple dots indicate snowline. Fasset Glacier drains west from The Brabazon Range near Yakutat and had terminated in Tanis Lake for the entire 20th century.  (Truessel et al 2013) and Truessel et al (2015) note the rapid retreat and thinning of nearby Yakutat Glacier. …

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April 21, 2017

Yakutat Glacier Terminus Collapse, 10 km retreat 1987-2016

Landsat images from 1987 and 2016 with terminus indicated by yellow dots. Point A indicates the 1987 terminus location and Point E the 2016 terminus location.  The Yakutat Glacier during the 1894-1895 Alaskan Boundary Survey ended near a terminal moraine on a flat coastal outwash plain. By 1906 the glacier had retreated from the moraine and a new lake was forming. Harlequin Lake. Surveys of the terminus of the glacier indicated …

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March 22, 2017

Hallo Glacier Retreat, Katmai Alaska

Landsat images of Hallo Glacier in 1985 and 2015 indicating the 1985 terminus position red arrows and yellow dots indicate 2015/2016 terminus location.  Purple dots show the snowline Hallo Glacier is one of the larger glaciers in Katmai National Park draining east from Mount Steller and ending in an expanding proglacial lake east of Hallo Bay.  Hallo Bay is well known as a good location for brown bear watching (NPS).  Arendt …

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February 24, 2017

Shoup Glacier, Alaska Retreat, Thinning, Velocity Decline

Shoup Glacier comparison in 1986 and 2016 Landsat images.  The glacier retreated 1900 m in this interval.  Red arrow is 1986 terminus, yellow arrow the 2016 terminus, green arrow rock rib emerging from beneath glacier, purple dots a landslide deposit, and purple arrow the snowline. Shoup Glacier is between the Columbia Glacier and Valdez draining from the Chugach Mountains in southern Alaska.  The glacier was a tidewater terminating glacier until …

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November 1, 2016

Desolation Valley, Alaska, Conversion from Glacier to Lake

  Retreat of Desolation-Fairweather Glacier from 2010-2016 in Landsat images.  The red arrow indicates 2010 terminus positions, yellow arrow the 2016 terminus. Pink arrow a delta exposed by lake level lowering. D=Desolation Glacier. Desolation Glacier flows west from the Fairweather Range into Desolation Valley where in 1986 it joined with the Fairweather Glacier flowing from the north and the Lituya Glacier flowing from the south to fill the valley with glacier …

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September 20, 2016

South Sawyer Glacier Retreat and Separation, Alaska

Comparison of South Sawyer Terminus position and unnamed glacier just to the south.  Red arrows are the 1985 terminus and yellow arrows the 2016 position of each terminus.  South Sawyer Glacier is a 50 km long tidewater glacier terminating at the head of Tracy Arm fjord in Southeast Alaska.  The winding fjord surrounded by steep mountains is fed by Sawyer and South Sawyer Glacier is home to stellar sea lions, humpback …

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September 14, 2016

Herbert Glacier Retreat, Alaska 1984-2016

Comparison of Herbert Glacier terminus position in Landsat images from 1984 and 2016. Red arrow 1984 terminus, yellow arrow 2016 terminus and pink arrow a tributary that has separated.  Herbert Glacier drains the west side of the 4000 square kilometer Juneau Icefield in Southeast Alaska.  It is the glacier just north of the more well known Mendenhall Glacier and just south of Eagle Glacier.  It is also the first glacier …

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