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February 19, 2018

Pared Nord Glacier, Chile Retreat & Landslide Transport 1987-2018

Pared Nord Glacier, Chile in 1987 and 2018 Landsat images.  The red arrow indicates the 1987 terminus location, yellow arrow the 2018 terminus location and purple arrows areas of expanding rock in the lower accumulation zone.  Point A is the front of a wide debris zone from a former landslide, Point B is the front of another landslide deposited debris zone. Point C is a recent landslide deposit on a …

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February 15, 2018

Gora Gvandra Glaciers, Caucasus Mountains, No Accumulation Zone in 2017

Comparison of glaciers around Gora Gvandra, Caucasus Mountians in 1985 and 2017 Landsat images.  G=Gvandra Glacier, D=Dalar galcier, DN =North Dalari Glacier, S=Sakeni Glacier and M=Morde Glacier.  Gora Gvandra Mountain is southwest of Mount Elbrus of the Caucasus Mountains of Georgia and is surrounded by a group of glaciers that in recent years have not exhibited an accumulation zone.  Stokes et al (2006) note that 94% of Caucasus Mountain glaciers retreated …

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February 9, 2018

Risting Glacier, South Georgia Retreat Expands Drygalski Fjord

Risting Glacier right and Jenkins Glacier left in Landsat images from 2002, 2015 and 2016.  Red arrow is the 2002 terminus lcoation and yellow arrow at 2016 terminus location.  Dryglaski fjord extends southeast from the glaciers.  Risting Glacier terminates in Drygalski Fjord on the southeast coast of South Georgia.  Risting and Jenkins Glacier were joined until the 1980’s.  Cook et al (2010) note the glacier had a relatively uniform retreat …

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February 5, 2018

Double Glacier, Alaska Retreat at the Double & A Volcanic Ash Blanket

Double Glacier, Alaska in 1986 and 2017 Landsat images.  The 1986 terminus location of the northern Big River Lobe and Southern Drift River Lobe are shown with red arrows. Yellow arrows indicate the 2017 terminus locations.  Purple dots indicate the snowline.  Point A indicates a prominent and expanding nunatak that is below the snowline. Double Glacier is the largest glacier contained within the Lake Clark National Park (LCNP) with an …

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January 30, 2018

Franz Josef Islands Separate due to Glacier Retreat

Hall Island (left) and Littrow Island (right) in 2002 and 2017 Landsat images.  The islands are connected by glacier in 2002 between the black arrows.  The blue arrows indicate glacier flow.  In 2017 the glacier connection has failed and Nordenskjold Strait has formed.  Hall and Littrow Island are two islands in the southern part of Franz Josef Land, Russia that have until 2016 been connected by glacier. Sharov et al …

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January 25, 2018

Blockade Glacier, Alaska Retreat Generates Expanding Lake

Blockade Glacier in 2000 and 2017 Landsat images.  Red arrow indicates 2000 terminus locations, yellow arrows 2017 terminus locations and purple dots the snowline.  Blockade Glacier drains east from the Neacola Mountains in southern Alaska.  The glacier has two prominent terminus locations, the western terminus is in Blockade Lake, blocked by the glacier and the eastern terminus is in a new expanding lake at the headwaters of the MacArthur River. Arendt …

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January 22, 2018

Dickson Glacier, Argentina/Chile Retreat, Separation &Lake Opening

Dickson Glacier (D) retreat illustrated by 1985 and 2017 Landsat images. Red arrows the 1985 terminus position, yellow arrows the 2017 terminus position, C=Cubo Glacier, A=Island, pink arrow indicates where islands form, purple dots indicate snowline and LD=Lago Dickson. Dickson Glacier is located in Southern Patagonian Icefield (SPI) in Torres del Paine National Park straddling the Argentina and Chile border.  The glacier in 1985 had both an eastern and southern terminus, the …

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January 17, 2018

Konig Glacier, South Georgia Separates from Neumayer Glacier in 2017

Konig Glacier (K) terminus retreat compared in 1999 and 2017 Landsat images.  The red arrow indicate the 1999 terminus location, yellow arrows 2017 terminus location and blue arrows the surface movement. The southern terminus formerly connected with Neumayer Glacier (N) is now separate. Konig Glacier is a land terminating glacier just north of the Neumayer Glacier, on the northwest coast of South Georgia.  The glacier has a split terminus, a northern …

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January 12, 2018

Glaciar Olvidado, Chile Retreat Lake Expansion 1985-2017

Glaciar Olvidado (O) retreat illustrated in 1985 and 2017 Landsat images.  Red arrow is 1985 terminus location, yellow arrow is 2017 terminus location and purple dots are the snowline.  This illustrates an 1800 m retreat.  Glaciar Olvidado (G) is a glacier in the southeast portion of the Southern Patagonia Icefield (SPI), adjacent to Grey Glacier (G).  The glacier terminates in a proglacial lake. Rivera and Casassa (2004) report the glacier terminating …

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January 8, 2018

Safuna & Arhuey Glacier, Peru Retreat from Lakes

Safuna Glacier (S) and Arhuey Glacier (A) in 1992 and 2017 Landsat images indicating glacier retreat from the 1992 terminus red arrow to the 2017 terminus position yellow arrow.  Snowline indicated by purple dots. Safuna Glacier (S) is at the northern end of the Cordillera Blanca Range, Peru flowing north from Nevados Pucajirca.  Arhuey Glacier (A) is adjacent to Safuna and flows west formerly terminating in Arhuey Lagunacocha impounded by …

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