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

April 26, 2017

Fasset Glacier, Alaska Retreats from Tanis Lake

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

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

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, 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

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

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

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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July 28, 2016

Sater Glacier, Alaska Not Retaining Snowcover

Sater Glacier, Alaska Not Retaining Snowcover

2012 Google Earth Image. Purple arrows indicate areas where the margin is receding well above the lowest terminus. Sater Glacier is in the Okpilak River watershed of the Brooks Range, Alaska. It is named for John Sater an early geologist working in the Brooks Range and on the nearby McCall Glacier. Here we examine Landsat imagery from 1987-2016 to identify changes in the glacier. Matt Nolan, U. Alaska-Fairbanks,  has provided links to the …

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July 7, 2016

Lamplugh Glacier Recent Behavior and Landslide Source Area, Alaska

Lamplugh Glacier Recent Behavior and Landslide Source Area, Alaska

Landsat image comparison of Lamplugh Glacier 1985, 2013, 2015 and 2016.  The orange arrows indicate extensive surface moraine deposits.  purple arrows the region below the slope where landslide was triggered.  Point B trigger location and Point A a nearby cloud free location in each image. A recent large landslide onto Lamplight Glacier on June 28, 2016 has been reported by KHNS.  The landslide was triggered on the north slope of …

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July 4, 2016

McBride Glacier Increased Retreat and Harbor Seals, Glacier Bay, Alaska

McBride Glacier Increased Retreat and Harbor Seals, Glacier Bay, Alaska

McBride Glacier (M), its secondary terminus (Ms), MCbride Inelt (MI) and Riggs Glacier (R) in Landsat image comparison from 1985 and 2015.  The red arrows indicate the 1985 terminus location and the yellow arrows the 2015 terminus location.  Main terminus 4.4 km retreat, secondary terminus 2.7 km retreat. McBride Glacier was part of the Muir Glacier complex in Glacier Bay, Alaska, until the 1960’s when it separated from Muir and adjacent …

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