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June 20, 2019

Arnesenbreen, Svalbard Retreat, Separation and Surge

Arnesenbreen (A) and Bereznikovbreen (B) in 1990 and 2018 Landsat images.  Red arrow is 1990 terminus location, yellow arrow the 2018 terminus location and purple dots the transient snowline. Arnesenbreen and Bereznikovbreen are glaciers in Svalbard on the east coast of Spitsbergen that in 1990 had a joint calving front near Kapp Murchison. Blaszczyk et al’s (2009) analysis identified 163 Svalbard glaciers that are tidewater with the total length calving …

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June 14, 2019

Varied Snowcover Extent Diagnostic of Glacier NP Glacier Climate Response

Snowcover extent in Landsat images from August, 1998 and 2018. S=Sperry, H=Harrison, J=Jackson, B=Blackfoot and P=Pumpelly Five of the eight largest glaciers in Glacier National Park are clustered in a small area: Jackson Glacier, Sperry Glacier, Pumpelly Glacier, Harrison Glacier, and Blackfoot Glacier. The USGS in Glacier National Park has over the last 15 years maintained an extensive glacier monitoring program led by Dan Fagre.  This program has led to consistent …

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June 10, 2019

Asejiaguo Glacier, China Retreat and Lake Expansion

Asejiaguo Glacier in Landsat images from 1993 and 2018.  The yellow arrow indicates the 2018 terminus and the red arrow the 1993 terminus location.  Point 1 and 2 are areas of expanding bedrock in the 5400-5600 m. Asejiaguo Glacier drains east from the China-Nepal Border and is at the headwaters of the Yarlung Tsangpo, which becomes the Brahmaputra River.  The Yarlung Tsangpo powers the 510 MW Zangmu Hydropower Station.  Gardelle …

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June 4, 2019

Daishapu Glacier, China Retreat Lake Expansion

Daishapu Glacier (D) and Ruorangqubu Glacier (R) in 1993 and 2018 Landsat images.  The yellow arrows indicate the 2018 terminus location of both glaciers and the purple dots the snowline. Notice the lake expansion at the terminus of both glaciers. Locations 1-4 are tributaries. Daishapu Glacier and Ruorangqubu Glacier are in the eastern Himalaya located just north of the Himalayan divide and draining north into the Yarlung Zangbo. This is …

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May 28, 2019

Sulmeneva Bay Glacier Retreat 1990-2018, Novaya Zemlya

Sulmeneva Bay Glacier in Landsat images from 1990 and 2018.  Red arrow is the 1990 terminus location, yellow arrow the 2018 terminus location and pink dots the snowline. Here we examine an unnamed glaciers, referred to here as Sulmeneva Bay Glacier, that terminated in a piedmont lobe near the northern shore of Sulmeneva Bay and just east of Lednikovoye Lake in central Novaya Zemlya. Sulmeneva Bay is on the west …

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May 20, 2019

Chickamin Glacier, Alaska Retreat Generates Separation and Lake Expansion

Chickamin Glacier, Alaska in 1985 and 2018 Landsat images indicating the 3.5 km retreat and associated lake expansion. Red arrow is 1985 terminus location, yellow arrow is the 2018 terminus location, pink arrow is former junction area with Through Glacier.  The purple dots indicate the snowline.  Point 1 and 2 are locations of bedrock expansion above the equilibrium line altitude.  Chickamin Glacier in southeast Alaska glacier drains south from an …

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May 13, 2019

Sonderarm Glaciers Retreat, Southern Greenland

Three glaciers at the head of Sonderarm fjord in 1999 and 2018 Landsat images.  Yellow arrows indicate terminus location in 2018 of each glacier, pink arrow indicates a separate valley glacier that has diminished. Sonderarm is a fjord that extends south from Lindenow Fjord in southern Greenland. The glacier is a short distance east of Kangersuneq Qingordleq, where recent retreat has led to glacier separation and a just south of …

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May 5, 2019

Zaroshkul Glacier Retreat, Tajikistan

Zaroshkul Glacier in 1994 and 2018 Landsat imagery. Z=Zaroshkul Lake, A=Developing lake, red arrow=1994 terminus, yellow arrow=2018 terminus and purple dots=snowline. Zaroshkul Lake is in the midst of the Pamir Range, Tajikistan and is surrounded by glacier clad mountains.  Here we examine Landsat imagery from 1994-2018 of the Zaroshkul Glacier the largest glacier in the basin to identify changes.  The Pamir Range has experienced less glacier mass loss than most …

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April 29, 2019

Excelsior Glacier, Alaska Retreat Leads to Lake Doubling in Size

Excelsior Glacier retreat from 1994 to 2018 in Landsat images from 1994, 2011 and 2018.  The red arrow is the 1994 terminus location and the yellow arrow is the 2018 terminus location.  Point A and B are on the south and northwest side of the eastern tributary of the glacier. Excelsior Glacier is an outlet glacier of the Sargent Icefield, on the Kenai Peninsula of Alaska, that has terminated in …

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April 24, 2019

Twitcher Glacier, South Georgia, 40% of Length Lost 1989-2019

Twitcher Glacier in Landsat images from 1989 and 2019.  The red arrow is the 1989 terminus and yellow arrow is the 2019 terminus.  1, 2 and 3 are tributaries. Twitcher Glacier is the next glacier south of Herz Glacier on the east coast of South Georgia. Until 1989 the glacier ended at the tip of a peninsula, the ensuing retreat has led to the opening of a new fjord.  Twitcher …

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