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December 11, 2017

From a Glaciologists Perspective AGU Day 1

The theme changes from a glaciers to a glaciologists perspective with a focus on selected work at the AGU 2017. The research discussed here is from the Poster Paper sessions the most interactive part of the convention.  The following are some interesting snapshots of the breadth and depth of ongoing research.  The most compelling figure from each poster is used. Richard Forster, U of Utah team presented work on the …

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December 8, 2017

Muller Ice Shelf, Antarctica Retreat and Rift Zone Expansion

Muller Ice Shelf (M) in 1989 and 2017 Landsat images fed by the Antevs (A) and Bruckner Glacier (B). The ice front is shown with yellow dots with separate calving margins on either side of Humphrey Island (H).  The blue arrow indicates a developing rifted zone of ice weakness.  The pink arrows point out icebergs among sea ice.  Muller Ice Shelf is on the west side of the Antarctic Peninsula …

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December 6, 2017

Zhongni Glacier Retreat, China and Hydropower

Zhongni Glacier changes from in Landsat images from 1994 to 2015. The red arrow is the 1994 terminus, yellow arrow the 2015 terminus, purple dots the snowline and purple arrows lakes adjacent to the margin of the western glacier in 1994. Zhongni Glacier is 15 km northwest of Gangotri Glacier just across the border into China.  The glacier drains in to the Langgen Zangbo, which becomes the Sutlej River in India. …

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December 4, 2017

Global Glacier Change Bulletin-Many Glaciers Same Story

  Cumulative glacier mass balance losses reported by WGMS by region, all glacier, reference glaciers and geodetic mass balance (Sholes Glacier, WA in background).  The data set size, location and type changes but the story remains the same, mass loss resulting from global temperature increase. The World Glacier Monitoring Service has released the second bulletin of Global Glacier Change.  The bulletin provides detailed global and regional information on alpine glaciers …

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November 27, 2017

Alsek Glacier, Alaska Retreat & Glacier Separation

Alsek Glacier in a 1984 Landsat image and 2017 Sentinel image.  Red arrows indicate 1984 terminus, yellow arrows 2017 terminus location, pink arrows tributaries that joined the glacier in 1984 and purple dots the snowline.  AR=Alsek River, G=Gateway Knob and P=Prow Knob. Alsek Glacier descends from the Fairweather Range terminating in Alsek Lake on the coastal plain. The glacier terminated at Gateway Knob (G) near the outlet of Alsek River …

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November 21, 2017

Bridge Glacier, Southeast Alaska Retreat & Lake Formation

Bridge Glacier in Landsat image from 1984 and Sentinel image from 2017. The red arrow indicates the 1984 terminus where no lake exists, yellow arrow is 2017 terminus, orange arrows are selected tributaries and purple dots the snowline.  Bridge Glacier drains the same icefield as the Wright and Speel Glacier 45 km southeast of Juneau, Alaska. Here we examine the changes in this glacier from 1984-2017 using Landsat and Sentinel imagery. In 1984 the …

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November 15, 2017

HPS-12, Chile Spectacular 13 km retreat 1985-2017

HPS-12 Glacier in 1985 and 2017 Landsat images.  The red arrow indicates 1985 terminus, yellow arrows the 2017 terminus, purple dots the snowline and 1-4 are tributaries.  By 2017 all tributaries have detached and the glacier has retreated 13 km.  HPS-12 is an unnamed glacier draining the west side of the Southern Patagonia Ice Cap (SPI).  The glacier terminates in a fjord and is adjacent to Upsala Glacier to the …

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November 9, 2017

Storbreen, Svalbard Major Retreat Opens New Fjord

Storbreen, Svalbard in 1990 and 2017 Landsat images.  The red arrows indicate 1990 terminus , yellow arrow the 2017 terminus and purple dots the snowline in 1990.  A recent snow storm has obscured the actual snowline in Aug 2017.  Storbreen Glacier (ST) terminates on the north side of Hornsund in southern Svalbard.  From 1990 to 2017 Storbreen has experienced a substantial retreat opening a new fjord and separating from Hornbreen …

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November 7, 2017

Ryan Glacier, South Georgia Retreats from Tidewater

Ryan (R) and Brunonia Glacier (B) in 1999 and 2016 Landsat images.  Red arrows indicate the 1999 terminus and pink arrows a new proglacial lake.  Ryan Glacier and Bunonia Glacier span the width of South Georgia near its northwestern tip.  Brunonia Glacier flow east and terminates in Sunset Fjord and Ryan Glacier flows to the west into Ice Fjord, which seems more viable as a “Sunset” Fjord.  The glacier divide …

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November 3, 2017

Gråfjellsbrea, Norway Retreat Forms New Lake

Gråfjellsbrea Retreat in Landsat images from 1999 to 2017.  Red arrow indicates 1999 terminus, yellow arrow the 2017 terminus location.  Gråfjellsbrea is an outlet glacier on the northwest side of the Folgefonna  Icefield that drains into Mysevatnet.  The 2012 Norwegian Glacier Inventory notes the glacier having an area of 8.77 square kilometers in 2002.  In 2016 the Norwegian Water Resources and Energy Directorate (NVE) reported this glacier to have the greatest retreat …

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