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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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April 20, 2019

North Cascade 2019 Winter Accumulation Assessment

April 1 winter accumulation at the longer term North Cascade SNOTEL stations (Fish Lake, Lyman Lake, Park Creek, Rainy Pass, Stampede Pass and Stevens Pass). For North Cascade glaciers the accumulation season provides that layer of snow, that must then last through the melt season.  A thin layer sets the glaciers up for a mass balance loss, much like a bear with a limited fat layer would lose more mass …

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April 15, 2019

Northern Patagonia Icefield High Equilibrium Line Altitude in 2019

Northern Patagonia Icefield Landsat view on 4/6/2019. Transient snowline indicated on individual glaciers with purple dots. Clockwise, L=Leones, So=Soler, N=Nef, Ca=Cachet, Co=Colonia,  PN=Pared Nord, PS=Pared Sur, H4=HPN4, St=Steffen, A=Acodado, B=Benito, H1=HPN1, Sq=San Quintin. The Northern Patagonia Icefield from 1987-2015 decreased in area, while debris cover area expanded and the size of proglacial lakes expanded (Glasser et al 2016).  The icefield area declined from 4113 to 3887 km2, debris cover increased …

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April 9, 2019

Glaciers Retreat from Evighedsfjord, Greenland

Evighedsfjord (E) with glaciers terminating in the fjord in 2000 and 2018 Landsat images. Q=Qingua Kujatdleq is at the head of Evighedsfjord (Q), Tapa Glacier (1), Unnamed glaciers (2 and 3), and developing nunatak area (4) .  The red arrow is the 2000 terminus and the yellow arrow is the 2018 terminus.  Evighedsfjord (Kangerlussuatsiaq Fjord) in southwest Greenland has numerous glaciers that reach or did reach this 75 km long …

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April 4, 2019

Norðurjökull Retreats from Hvítárvatn, Langjökull, Iceland

Norðurjökull in 1984 Landsat image and 2018 Sentinel image.  Red arrows indicate the margins of the glacier in 1984.  Purple dots indicate the snowline. Langjökull is the second largest icecap in Iceland with an area of 920 square kilometers (Jóhannesson (2009). One of the main outlet glaciers of Langjökull is the Norðurjökull which has terminated in Hvítárvatn. Hvítárvatn is a large lake that recieves 70% of its inflow from Langjökull …

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April 1, 2019

Nakonake Glaciers, BC Retreat Two are Disappearing

Nakonake Glaciers in 1984 and 2018 Landsat images. Nakonake Glaciers are NW=Northwest, N=North, M=Middle, S=South, SE=Southeast.  Red arrows indicate the 1984 terminus position of the North and Middle Nakonake Glaciers.  Yellow arrows indicate the 2018 terminus location of each. Purple dots indicate the snowline and the pink arrow indicates locations of glacier separation. The Nakonake Glaciers are a group of unnamed glaciers at the headwaters of the Nakonake River in …

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March 21, 2019

Nevado Ausangate Glaciers, Peru Retreat and Lake Formation

Digital Globe image of Ausangate Glaciers. Red arrows indicate 1995 terminus location and yellow dots the 2018 terminus location. Here we examine three Ausangate Glaciers, Peru descending south from the Nevado Ausangate group of peaks in the Cordillera Vilcanota.  A circumnavigation trek around Nevado Ausangate is a favorite for visitors to the Machu Picchu area. The glaciers are just west of Laguna Sibinacocha, and drain into the Rio Vilcanota.  Retreat …

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March 18, 2019

Soranano Glacier, Peru Separation and Retreat 1995-2018

Western Soranano (WS) and Eastern Soranano Glacier (ES) in 1995 and 2000 Landsat images and 2018 Sentinel image, with red arrows indicating the terminus in 1995, and yellow arrows the 2018 terminus.  Here we examine the west and east Soranano Glacier glacier descending south from the 5800 m summit of Jatunnano (Hatun Nana Punta). The glaciers are just east of Laguna Sibinacocha, which drains into the Rio Vilcanota.  Retreat of …

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March 11, 2019

Läntagletscher, Switzerland Separates From Rapidly Melting Terminus Lobe

Läntagletscher (L)  in 1990 Landsat image and 2018 Sentinel image.  Red arrow is the 1990 terminus location, yellow arrow 2018 terminus location, Zervreilasee (Z)  and Gufergletscher (G) Läntagletscher is in the Alps draining into the Zervreilasee and then the Rhone River.  Zervreila is a 22 MW hydropower facility, with a 150 m high arch dam . From 1990-2014 the glacier retreated at a steady rate of ~24 m/year.  The upper portion …

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