July 21, 2016

Sjögren Glacier Fast Flow, Fast Retreat, Antarctica

Sjögren Glacier Fast Flow, Fast Retreat, Antarctica

Sjögren Glacier comparison in Landsat images from 2001 and 2016, red dots indicate terminus position, Point A, B, C and D are in fixed locations.  Sjögren Glacier flows east from the northern Antarctic Peninsula and prior to the 1980’s was a principal feeder glacier to Prince Gustav Ice Shelf.  This 1600 square kilometer ice shelf disintegrated in the mid-1990’s and was gone in 1995 (Cook and Vaughan, 2010). Scambos et al (2014) …

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July 18, 2016

Chaupi Orko Glaciers, Bolivia Extensive Recession

Chaupi Orko Glaciers, Bolivia Extensive Recession

Landsat comparison of the Chaupi Orko Glaciers from 1988, 1999 and 2015.  Red arrows indicate 1988 terminus and yellow arrows the 2015 terminus location. Chaupi Orko is a 6044 m Andean peak in the Cordillera Apolobamba on the Peru-Bolivia border with glaciers radiating from it summit.  Here we examine a pair of glaciers on the southern side of the mountain that drain into Laguna Suches, which is split by the …

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July 12, 2016

Rainbow Glacier Not Fading Away, Glacier National Park

Rainbow Glacier Not Fading Away, Glacier National Park

Rainbow Glacier is the third largest of the 25 remaining glaciers in Glacier National Park occupying an east facing cirque between 2650 m and 2330 m. The glacier drains into Quartz Lake a key lake for bull trout in GNP, which are threatened by both invasive lake trout and climate change (Jones et al, 2013).  The National Park Serice and USGS have been established a glacier monitoring program that focuses …

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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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June 29, 2016

Conducting Long Term Annual Glacier Monitoring

Conducting Long Term Annual Glacier Monitoring

Easton Glacier in 1990, 2003 and 2015 from same location. Below Painting by Jill Pelto of crevasse assessment using a camline. This is the story of how you develop and conduct a long term glacier monitoring program.  We have been monitoring the annual mass balance of Easton Glacier on Mount Baker, a stratovolcano in the North Cascade Range, Washington since 1990.  This is one of nine glaciers we are continuing to …

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June 27, 2016

Suatisi Glacier Retreat, Mount Kazbek, Georgia

Suatisi Glacier Retreat, Mount Kazbek, Georgia

Comparison of Suatisi Vost (SV) and Suatisi Sredny (SS) in 1986 and 2015 Landsat images.  The red arrow is the 1986 terminus and the yellow arrows the 2015 terminus.  Point A and B are to areas of expanding bedrock amidst the glacier.  Suatisi Vost and Suatisi Sredny Glacier are two glaciers on the south flank of Mount Kazbek in northern Georgia.  The region is prone to landslides and debris flows. On …

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June 23, 2016

Canadian Columbia Basin Glacier Spring 2016 Field Season (winter 2015-2016 Assessment)

Canadian Columbia Basin Glacier Spring 2016 Field Season (winter 2015-2016 Assessment)

Guest Post by Ben Pelto, PhD Candidate, UNBC Geography, pelto@unbc.ca During the spring season we visited our four study glaciers (Figure 1), which form a transect of the Columbia Mountains from the Kokanee Glacier in the Selkirk Range to the south, to the Conrad (Purcells) and Nordic (Selkirks) in the center, to the Zillmer of the Premier Range in the north. This post will explore the snowpack of winter 2016 across …

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June 21, 2016

Chutanjima Glacier Retreat & High Snowline, Tibet, China 1991-2015

Chutanjima Glacier Retreat & High Snowline, Tibet, China 1991-2015

A comparison of three Tibet glaciers in 1988, 1991 and 2015 Landsat images. Red arrows are the 1988 terminus position, yellow arrow the 2015 terminus location and purple dots the snowline in late October 2015.  U=unnamed, CH=Chutanjima Glacier and MO=Mogunong Glacier: which did not retreat significantly and lacks a red arrow. A recent European Space Agency Sentinel-2A image of southern Tibet, China and Sikkim illustrated three very similar glaciers extending …

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June 17, 2016

Brady Glacier, Alaska 2016 Early Melt Season & Lake Expansion

Brady Glacier, Alaska 2016 Early Melt Season & Lake Expansion

Comparison of Brady Glacier in 1986 and 2016 Landsat images.  The snowline is similar in May 2016 and August 1986. Lakes noted are: A=Abyss, B=Bearhole, D=Dixon, N=North Deception, O=Oscar, Sd=South Dixon, Sp=Spur, T=Trick. 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). In 2016 the melt season has been intense for the Brady Glacier in …

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