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May 18, 2020

Talking about Iceberg Melt Rates and Glacier Frontal Ablation: Seller and Heim Glacier, Antarctica

Figure 1: Study sites considered in this article: Seller Glacier and Heim Glacier (Landsat-8 image courtesy of the U.S. Geological Survey) Post by Mariama Dryak Iceberg melt is caused by the temperature of the water in which an iceberg floats and the velocity of the water flowing around the iceberg. As a result, iceberg melt is an excellent indicator for the ocean conditions in which an iceberg resides. Given the …

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May 13, 2020

Frank Mackie Glacier, BC Retreat Forming Lake

Frank Mackie Glacier, British Columbia in Landsat images from 1987 and 2019.  Red arrow is the 1987 terminus location, yellow arrow the 2019 terminus location and purple dots the snowline. Point 1-3 are specific locations where bedrock exposure has expanded. Frank Mackie Glacier is at the headwaters of the Bowser River which flows into Bowser Lake and the Nass River in NW British Columbia. The glacier has repeatedly advanced across …

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May 5, 2020

Huron Glacier Retreat, Livingston Island, Antarctica 2001-2020

Huron Glacier (H) and Kaliakra Glacier (K) in 2001 and 2020 Landsat images.  Extensive retreat at bedrock locations Point A and B with limited retreat at C and D. Livingston Island, Antarctica is part of the South Shetland Island chain and is primarily covered by glaciers.  At the eastern end is Huron Glacier. Huron Glacier and the adjacent Kaliakra Glacier are tidewater outlet glaciers terminating in Moon Bay on the …

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April 27, 2020

Vern Ritchie-Battle Glacier, British Columbia Retreat, Lake Growth, Snowline Rise

Vern Ritchie (VR) and Battle Glacier (B) in 1987 and 2019 landsat images.  Three proglacial lakes have expanded at Points 2-5. WN=West Nunatak Glaier, Y=Yakutat Glacier N=Novatak Glacier, purple dots indicate snowline and green arrows indicate glacier flow direction. Vern Ritchie and Battle Glacier flow from the Alaska/Canada border of the St. Elias Mountains towards the Alsek River. In 1987 the two glaciers that share both an accumulation zone and …

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April 20, 2020

Kolahoi Glacier Retreat and Lidder Watershed Changes, Kashmir

Kolahoi Glaciers (G1 and G2)  in 1993 and 2019 Landsat images.  Red arrow indicates 1993 terminus location and yellow arrow the 2019 terminus location.  The purple arrow indicates a debris covered area of a tributary to G1 that does not have active flow and will be disconnected. A new terminus is forming at yellow arrow left of purple arrow.  Purple dots is snowline. The Kolahoi Glacier in Kashmir is known …

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April 16, 2020

Neumayer Glacier 8.8 km retreat 1999-2020 Fjord Expansion

Neumayer Glacier (N) in 1999 and 2020 Landsat images. Red arrow is 1999 terminus position, pink arrow 2016 terminus location and yellow arrow March 2020 terminus location. K=Konig and T=Three Brothers Tributary, L=glacial lake. Neumayer Glacier, South Georgia  is a calving glacier that has been retreating rapidly since 1993 that was dynamically connected to the Konig Glacier along its southern margin just where the glacier turns northeast  The glacier ends …

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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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