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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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March 6, 2019

Lemon Creek Glacier 2018 Ablation and Glacier Runoff

Lemon Creek Glacier (L) with the snowline (black line) indicated in Landsat images from July 5, July 30 and Sept. 16 2018. P=Ptarmigan Glacier, T=Thomas Glacier, red arrow is the 1948 terminus location. A,B and C mark firn horizons exposed by the loss of all snowpack in the accumulation zone. The summer of 2018 was exceptional for warmth in Southeast Alaska.  July was the most unusual with Juneau recording daily …

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March 1, 2019

Skilak Glacier, Alaska Retreat and Salmon Connection

Skilak Glacier in 1986 and Sept. 2018 Landsat images.  In 1986 icebergs and remnant glacier fill nearly the entire lake.  The snowline in 1986 is at 1200 m and is at 1300 m in 2018. Red arrow is the 1982 terminus location and yellow arrow is the 2018 terminus location. Point A and C are bedrock outcrops at around 1200 m that have expanded. Skilak Glacier is an outlet glacier on …

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February 22, 2019

Hindle Glacier Retreat, South Georgia 2 km 2015-2019

Hindle Glacier comparison in 2017 and 2019 Landsat images.  Red arrow is 1989 terminus, pink arrow the 2015 terminus, yellow arrow the 2017 terminus location and green arrow the 2019 terminus location.  South Georgia is south of the Polar Front preventing any truly warm season, with the cool maritime climate leading to numerous glaciers covering a majority of the island.  Hindle Glacier enters Royal Bay on the east coast of South Georgia …

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February 18, 2019

Boulder Glacier, Mount Baker Washington Retreat 1980-2018

Boulder Glacier terminus position 1980-2018 as measured in the field. Note Lahar path that descends from Sherman Crater.  Lahars have also occurred subglacially during our field observations. Boulder Glacier flows down the east side of Mount Baker a strato volcano in the North Cascades of Washington. This steep glacier responds quickly to climate change and after retreating more than 2 kilometers from its Little Ice Age Maximum, it began to …

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February 13, 2019

Boydell Glacier, Antarctica Rapid Retreat 2001-2017

Boydell Glacier, Antarctica retreat in Landsat images from 2001 and 2017,  terminus in 2001 at red dots in 2017 at yellow dots.  A-E are reference points.  Boydell Glacier flows east from the northern Antarctic Peninsula and prior to the 1980’s was joined with the Sjogren Glacier as a principal feeder glacier to Prince Gustav Ice Shelf.  This 1600 square kilometer ice shelf connecting the Peninsula to James Ross Island disintegrated in the …

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February 8, 2019

Cachalote Glacier, Chile Retreats From Lake and Separates

Cachalote Glacier in a 1984 Landsat image and 2019 Sentinel Image.  Red arrow is 1984 terminus location, yellow arrow the 2019 terminus location and the pink arrow a tributary to the glacier in 1984 that separates. Cachalote Glacier is on the western edge of the Southern Patagonia Icefield, Chile. The glacier is not fed by the main icefield, but is connected to glaciers that are.  The glaciers of the SPI have …

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February 4, 2019

Heard Island Retreat of Glaciers Enables Lagoon Development

Stephenson Glacier (SG), Sephenson Lagoon (SL), Winston Glacier (WG) and Winston Lagoon (WL) in 2019 Sentinel Image. The Australian Antarctic Division (AAD) manages Heard Island and has undertaken a project documenting changes in the environment on the island. One aspect noted has been the change in glaciers. The Winston, Brown and Stephenson Glacier have all retreated substantially since 1947 when the first good maps of their terminus are available. Fourteen …

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January 28, 2019

Turbio Glacier Retreat, Argentina Generates New Lake

Turbio Glacier retreat from 1986 to 2018 in Landsat images.  Red arrow is 1986 terminus location, yellow arrow 2018 terminus location and pink arrow glacier across the border in Chile. Turbio Glacier is at the headwaters of the Turbio River, Argentina and flows into Lago Puelo.  The glacier descends east from  Chile/Argentina border at 1500 m descending into a low slope valley at 1300-1000 m.  From 1986-2018 this glacier like …

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