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July 15, 2021

Sheridan Glacier, Alaska Retreat Causes Rapid Lake Expansion

Sheridan Glacier in 2002 and 2020 Landsat images illustrating retreat of the margin and expansion of the lake. Red arrow is 2002 margin on small island, yellow arrow is 2020 terminus location just north of Sherman Glacier stream and purple dots are the snowline. Sheridan Glacier in the Chugach Mountains of Alaska begins at 1500 m and flow southwest out of the mountains with the terminus spreading out in a  …

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July 9, 2021

Porcupine Glacier, British Columbia Southern Terminus Breakup

Porcupine Glacier, British Columbia in a July 4, 2021 Sentinel image illustrating the retreat from 2015-2021 and new iceberg breakup (B). Red arrow is 2015 terminus location and yellow arrows 2021 terminus locations of both branches. Porcupine Glacier is a 20 km long outlet glacier of an icefield in the Hoodoo Mountains of Northern British Columbia that terminates in an expanding proglacial lake. During 2016 the glacier had an unusually …

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June 29, 2021

Pacific Northwest June 2021 Heat Wave Current and Enduring Glacier Impact

Streamflow observation site below Sholes Glacier on August 6, 2015.  We have measured flow at this site for 30 years, the last 10 years in conjunction with the Nooksack Indian Tribe (Grah and Beaulieu, 2013; Pelto, 2015). The exceptional record breaking Pacific Northwest heat wave of June 2021 had an impact on snow melt both on and off glaciers in the North Cascade Range of Washington and consequently on alpine …

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June 25, 2021

Paarliit Sermia, Southern Greenland Terminus Separation

Paarliit Sermia in 2000 and 2020 Landsat images.  The red arrow indicates the 2000 terminus location and the yellow arrow the 2020/21 terminus location. A denotes the junction of two main glacier branches, while B,C and D indicate tributaries Paarliit Sermia is one of the most southerly tidewater glaciers in Greenland.  It is an outlet glacier of a mountain icefield and not part of the main ice sheet.  Similar to …

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June 17, 2021

Dawes Glacier, Alaska Retreat Driven Separation

Dawes Glacier retreat in 1985 and 2020 Landsat images. Red arrow 1985 terminus, yellow arrow 2020 terminus. Point 1-3 are tributaries joining the main glacier. The glacier is about to separate into two calving termini. Dawes Glacier terminates at the head of Endicott Arm in the Tracy Arm-Fords Terror Wilderness of southeast Alaska. Endicott Arm is a fjord that has been extending with glacier retreat, and is now  58 km …

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June 10, 2021

Jacobsen Glacier, BC Separation Nearly Complete

Jacobsen Glacier in Landsat images from 1987 and 2019. Red arrow 1987 terminus location, yellow arrow 2019 terminus location and pink dots the snowline. Point A indciates ice marginal lake in 1987, Point C is the glacier junction, Point B an emerging rock rib and Point D a nunatak. Jacobsen Glacier is part of the Monarch Icefield of the Coastal Range of British Columbia. VanLooy and Forster (2008) noted that …

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May 31, 2021

Valdez Glacier, Alaska Significant Calving Retreat in 2020

Valdez Glacier terminus in Sentinel images from 6-27-2020, 8-21-2020 and 5-23-2021. In June the glacier’s terminus area is poised to collapse with extensive rifting and marginal proglacial lakes along the east and west margins. In July the terminus breaks up and in August the lake is filled by a flotilla of icebergs.  The May image indicates the icebergs are still present.   Valdez Glacier is an outlet glacier from the Chugach …

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May 28, 2021

Vista Glacier, Glacier Peak WA Retreat and Snow Line Rise

Vista Glacier in 1998 and 2016 Digital Globe images with the the 1984 terminus red arrow and 2015 terminus yellow arrow, Point A is the rock seen below the glacier in 1994 image below and Point B is where the advance moraine reached the valley bottom. Vista Glacier is a valley glacier flowing down the northeast side of Glacier Peak (Dakobed) that drains into the Suiattle River. The glacier begins …

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May 22, 2021

Mena Kang West Glacier retreat and lake expansion, Tibet, China

    Mena Kang West Glacier in 2002, 2020 and 2021 Landsat images.  Red arrow is the 2000 terminus location, yellow arrow the 2021 terminus location and pink dots the snowline. “Mena Kang West” Glacier is an unnamed glacier that is to the west of Mena Kang (6140 m) at 28 N, 91.6 W in Tibet, China. The glacier drains into the Nyamjang Chu, which flows south in Arunachal Pradesh, …

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May 13, 2021

Herz Glacier, South Georgia Loses 25% of its Length 1989-2021

Landsat images from 1989-2021 of Herz Glacier.  Red arrow is 1989 terminus location, yellow arrows the 2021 terminus location. I=Iris Bay. Herz Glacier is on the southeast coast of South Georgia Island, and is adjacent to the Twitcher Glacier. The terminus change of this tidewater glacier ending in Iris Bay was completed by the British Antarctic Survey for the 1960-2011 period, see map below (Gordon et al, 2008). This map …

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