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February 6, 2021

Rio Frio Glacier, Chile Retreat-Lake Formation 1990-2020

Rio Frio Glacier (RF) in 1990 and 2020 Landsat images. Red arrow 1990 terminus, yellow arrow 2020 terminus, orange arrow new lakes formed after 2000, purple dots snow line. The “Rio Frio” Glacier is at the headwaters of the Rio Frio a tributary to Rio Palena in Parque Nacionale Corcovado of Palena Province of Chile.  Davies and Glasser (2012) noted that overall glaciers in the region lost 14% of their …

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January 24, 2021

January 2021 Thaw on Mount Everest Region Generates Ablation, Rolwaling Glacier, Nepal

Rolwaling Glacier in October 13, 2020, December 16, 2020 and January 17, 2021 Landsat imagery indicating the snow line rise that has persisted into mid- winter. Snow line indicated by yellow dots. Recent observations of rising snow lines on glaciers during the October- 2020-January 2021 period in Landsat imagery indicates that once again there is significant ablation occurring  on Himalayan glaciers, as has been the case in several recent years …

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January 15, 2021

Weddel Glacier Retreats from Tidewater, South Georgia Island

Weddel Glacier in 1989 and 2020 Landsat images.Red arrow marks the 1989 NW terminus, orange dots the terminus location, purple arrows locations of ice spilling over a ridge, pink arrow a tributary glacier and yellow arrow the base of an icefall. Weddel Glacier is on the southeast coast of South Georgia Island terminating in Beaufoy Cove  just north of Gold Harbor. The change in glacier terminus position was documented by …

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January 6, 2021

Is Harlequin Lake, Alaska the fastest Growing Glacier Lake in North America this Century?

Yakutat Glacier, Alaska in 1999 and 2020 Landsat image illustrating expansion of Harlequin Lake by 40.5 km². Yellow line is the 1999 margin, orange line is the 2020 margin, and yellow dots indicate the margin of the lake shoreline. Point A indicates the 1987 terminus location, Point X and Y the 1999 terminus location. Main terminus now extends south near Point C. Northern terminus extends west from Point B. Yakutat …

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December 28, 2020

Nangpa La and Nup La, Mount Everest Region are snow free through December 2020

Nangpa La (NPL) and Nup La  (NL)  in Landsat images from 10-13-2020 and 12-16-2020, CO=Cho Oyu Peak and purple dots indicate the snowline. Both passes can be crossed without traversing snow on December 16. The winter monsoon for the Nepal Himalaya is a dry cold period with limited precipitation or new snow accumulation.  Mount Everest region glaciers are summer accumulation type glaciers with ~75% of annual precipitation occurring during the …

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December 18, 2020

Is San Quintin Glacier Lake the fastest expanding lake this century in South America?

Landsat images of San Quintin Glacier from 2001 and 2020 indicate the expansion of both Lake A and Lake B due to glacier retreat. The Lake A basin as defined by the transect at the eastern narrow point, yellow line, has a total area of 41 km2 with the lake surface area now comprising 35.1 km2. San Quintin is the largest glacier of the Northern Patagonia Icefield (NPI) at 790 …

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December 11, 2020

Blondujökull, Iceland Retreat Exposes Broad Landscape

Blöndujökull in Landsat images from 2000 and 2020 illustrating terminus position, yellow line is 2020 and red line is 2000. Blöndujökull  is an outlet glacier on the west side of Hofsjökull, Iceland. The National Land Survey of Iceland has developed a DEM application that provides a detailed view of the islands glaciers and their immediate landscape. Johannesson (1997) reported the response time for Blöndujökull  to a climate change as ~90-100 …

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December 3, 2020

Soler Glacier Retreat and Lake Expansion

Soler Glacier in 1987 and 2020 Landsat images.  Red arrow indicates 1987 terminus location, yellow arrow indicates 2020 terminus location on north side of glacier.  Yellow dots indicate margin of lake and purple arrows indicate specific locations where glacier thinning is evident. Soler Glacier is an outlet glacier on the east side of the Northern Patagonia Icefield (NPI). The terminus response of this glacier has been slower and more limited …

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November 23, 2020

Coley Glacier and Sjögren Glacier, Antarctic Peninsula Exhibit Rapid Melt Feb. 2020

Coley Glacier in Landsat images from Feb. 4, 2020 and Feb. 13, 2020. Magenta dots indicate the snowline The impact of a period of record warm weather over the Antarctic Peninsula during February 2020 was rapid development of melt features and expansion of melt area on many glaciers near the tip of the Peninsula, where the temperature records were set at Esperenza and Marambio Base. Here we examine Landsat imagery at Coley …

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November 16, 2020

Gangotri Glacier, India Smallest Observed Accumulation Zone in 2020

Gangotri Glacier snowline averaging 5600 m on Oct. 16, 2020 in Landsat image, magenta dots indicate the snowline.  Yellow line is the Randolph Glacier Inventory margin. Tributaries: K=Kirti; G=Ghanohim, Su=Sumeru, M=Maiandi, S=Swachhand. Gangotri Glacier, India is in the Bhagirathi River watershed and is the largest glacier in the Garhwal Range of the Himalaya.  Gangotri Glacier supports hydropower as its meltwater runoff passes through three hydropower plants generating 1430 Megawatts including …

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