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

April 21, 2021

Geikie Glacier, Alaska Lofty No More

  Geikie Glacier (G) in 1986 and 2018 Landsat images. Pink arrow is the 1954 terminus, red arrow the 1986 terminus and yellow arrow the 2018 terminus location. GI is Geikie Inlet which the glacier withdrew from 110 years ago. Geikie Glacier is on the west side of Glacier Bay, Alaska. John Muir in October 1879 observed Geikie Glacier in Geikie Inlet, which had separated from Muir Glacier within the …

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March 2, 2021

Nellie Juan Glacier Loses Contact with Contact Glacier, Alaska

Nellie Juan Glacier (NJ) and Contact Glacier (C) in 1986 and 2020 Landsat images. Red arrow is the 1986 terminus location of both glaciers. Yellow arrow marks the terminus location in 2020 after glacier separation and purple dots mark the upper limit of Contact glacier at that time. Nellie Juan Glacier is a tidewater outlet glacier of the Sargent Icefield, Alaska. Just after 1935 the glacier retreated from moraine shoal …

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January 6, 2021

Is Harlequin Lake, Alaska the fastest Growing Glacier Lake in North America this Century?

Yakutat Glacier, Alaska in 1999 and 2020 Landsat image illustrating expansion of Harlequin Lake by 40.5 km². Yellow line is the 1999 margin, orange line is the 2020 margin, and yellow dots indicate the margin of the lake shoreline. Point A indicates the 1987 terminus location, Point X and Y the 1999 terminus location. Main terminus now extends south near Point C. Northern terminus extends west from Point B. Yakutat …

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September 23, 2020

Ellsworth Glacier, Alaska Calves Major Iceberg in 2020

Ellsworth Glacier in Landsat images from 2018, 2019 and 2020. Red arrow is the 2016 terminus location, yellow arrow is the 2020 termins location, pink arrow is the rift, purple dots is the snowline, iceberg is Point A. Glacier retreated 2.4 km, main iceberg 1 km2 Ellsworth Glacier is a valley glacier draining south from Sargent Icefield on the Kenai Peninsula in Alaska. Along with the Excelsior Glacier it has been the longest …

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July 17, 2020

Oscar Lake Expansion Carves Away at Brady Glacier, Alaska

Oscar Lake growth on the east margin of Brady Glacier in Landsat images from 2000-2020. Point A indicates glacier tongue that becomes iceberg. Blue arrows indicate flow direction. Brady Glacier,  is a large Alaskan tidewater glacier, in the Glacier Bay region that is beginning a period of substantial retreat Pelto et al (2013).   The glacier has a number of expanding lakes that are expanding as the secondary termini feeding them retreat. …

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March 23, 2020

Yalik Glacier, Alaska Retreat and Lake Expansion 1986-2019

Yalik Glacier (Y) in 1986 and 2019 Landsat images.  Red arrow is the 1986 terminus location and yellow arrow the 2019 terminus location. Petrof Glacier (P) is the western neighbor. Yalik Glacier drains an icefield on the Kenai Peninsula, glaciers draining east are in the  Kenai Fjords National Park, which has a monitoring program.  From 1950-2005 all 27 glaciers in the Kenai Icefield region examined  retreated (Giffen et al 2014).  Yalik Glacier …

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December 4, 2019

Wright Glacier, Alaska Snowline and Terminus Retreat

Wright Glacier in 1984 and 2019 Landsat images.  The red arrow indicates 1984 terminus location, yellow arrow 2019 terminus location, pink arrow where the surface slope steepens and red dots indicate the snowline.  Wright Glacier is the largest glacier draining an icefield just south of the Taku River and the larger Juneau Icefield. The glacier accumulation zone is mainly in British Columbia.  The glacier filled a lake basin in 1948 …

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October 9, 2019

Taku Glacier, Alaska Retreat Begins: A Two Century Long Advance Reversed by Climate Change

The Taku Glacier is the largest outlet glacier of the Juneau Icefield in Alaska.  Taku Glacier began to advance in the mid-19th century and this continued throughout the 20th century. At first observation in the 19th century the glacier was calving in deep water in a fjord.   It advanced 5.3 km between 1890 and 1948 moving out of the fjord into the Taku River valley, see maps below (Pelto …

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September 17, 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 …

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July 17, 2019

Mendenhall Glacier, Alaska Accumulation Zone Shrinks

Mendenhall Glacier in Landsat images from 1984 and 2018.  Yellow arrows indicates 1984 terminus location, read arrow the Suicide Basin tributary and the purple dots the snowline. Mendenhall Glacier is the most visited and photographed terminus in the Juneau Icefield region. The glacier can be seen from the suburbs of Juneau.  Its ongoing retreat from the Visitor Center and the expansion of the lake it fills is well chronicled.  Here …

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