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April 9, 2020

Rainbow Glacier Fieldwork 8-7-2018

The video is of a single day of field work on Rainbow Glacier on 8-7-2018.  This was our 702nd day of fieldwork during the project that began in 1984.  On this day the field team consisted of Mariama Dryak, Erin McConnell, Jill Pelto and Mauri Pelto. Rainbow Glacier is a valley glacier on the northeast flank of Mount Baker, a stratovolcano and the highest mountain in the North Cascade Range, …

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March 30, 2020

San Lorenzo Sur Glacier, Argentina Retreat 1986-2020

San Lorenzo Sur Glacier in Landsat images from 1986 and 2020.  Yellow arrow is the 2020 terminus location, red arrow the 1986 terminus location, purple dots indicate the snowline. Point A indicates a location at 1400 m where debris cover has expanded. San Lorenzo Sur Glacier is the main eastern outlet glacier of the Monte San Lorenzo range on the Chile-Argentina border. This Argentina glacier flows east from the border …

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March 27, 2020

Calluqueo Glacier, Chile Retreat 1986-2020

Calluqueo Glacier in Landsat images from 1986 and 2020.  Yellow arrow is the 2020 terminus location, red arrow the 1986 terminus location, purple dots indicate the snowline. Point A-D indicate bedrock areas that have expanded with glacier thinning. Calluqueo Glacier is the largest glacier of the Monte San Lorenzo range on the Chile-Argentina border. This Chilean glaciers flows west from the border and in 1986 terminated in Lago “Calluqueo”. From …

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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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March 15, 2020

Glacier Retreat Drives 400% Lake Expansion Southern Alps, New Zealand 1990-2020

Landsat images  from 1990 and 2020 of the Mueller (M), Hooker (H), Tasman (T) and Murchison (Mn) Glacier.  Red arrows indicate the 1990 terminus location, yellow arrows the 2020 terminus location and pink arrows the upglacier extent of debris cover in 1990. Glaciers of the Southern Alps of New Zealand have been losing ice volume since 1978, with an increasing rate in the last decade (Pelto, 2016).  Gjermundsen et al …

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March 9, 2020

Acodado Glacier, Chile Retreat Yields Tripling in Lake Area 1987-2020

Acodado Glacier retreat and lake expansion observed in 1987 and 2020 Landsat images.  Red arrow is the 1987 terminus locations, orange arrows the 2015 terminus and yellow arrows the 2020 terminus location.   Loriaux and Casassa (2013) examined the expansion of lakes of the Northern Patagonia Ice Cap (NPI). From 1945 to 2011 lake area expanded 65%, 66 km2. Rio Acodado has two large glacier termini at its headwater, HPN2 and …

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February 29, 2020

Ålfotbreen, Norway Mass Balance Large Loss in 2019

Ålfotbreen (A) in August 2003 and 2019 Landsat images.  The yellow line marks the divide between Ålfotbreen and Hansebreen (H). Pink dots indicate the 2003 margin.  There is no retained snowpack in 2003.  In 2019 there are two small patches near the divide  on Aug. 26 that melt away by the end of the summer. The Ålfotbreen Ice Cap , Norway (61°45’N, 5°40’E; area=17 km2) is the westernmost and most …

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February 19, 2020

Boydell Glacier Accumulation Zone Rapid Melt Feature Development February 2020

Boydell Glacier terminates at the island adjacent to Point A.  The accumulation zone between Point A, B and C is on January 12, 2020 has limited gray area indicating bare firn.  By Feb. 13 there is considerable cobalt blue snow/firn areas saturated with melt water. The yellow dots mark the margin of the ice sheet and pink dots the margin of the ablation zone on Feb. 13, 2020.  The Boydell …

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February 17, 2020

Record Antarctic Temperatures in Feb. 2020 Impact on Eagle Island Ice Cap

Eagle Island Ice Cap, Antarctica in Landsat images from Feb. 4, 2020 and Feb. 13, 2020.  Point E indicates an are area of snow/firn that is saturated with meltwater. Point A and B indicate locations where the amount of bare rock/ground and hence albedo have changed dramatically. This post was source for an article by Kasha Patel published by NASA Earth Observatory, CNN and Washington Post. The impact of period …

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February 11, 2020

Eyrie Bay, Antarctic Peninsula Retreat 2000-2020

From REMA Landsat images from Feb. 2016 and Oct. 2019 indicating the front of the Cugnot Ice Piedmont (CP)  and Broad Valley (BV) ice fronts in Eyrie Bay.  Point A, B, and C indicate specific bedrock knobs near the ice front.  Point D is just south of a side glacier entering the bay. Eyrie Bay is near the tip of the Antarctic Peninsula and is rimmed by tidewater glaciers including …

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