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April 13, 2021

Benito Glacier, Chile 2021 Calving Event Drives Further Retreat

  Benito Glacier in 2000 and 2021 Landsat images. Locations 1-6 are current or former distributary terminus locations. Red arrow is the 2000 terminus location and yellow arrow the 2021 terminus location.  A small cloud is obscuring an iceberg near terminus.  Purple dots are the snowline. Benito Glacier is a temperate outlet glacier on the west side of the North Patagonian Icefield terminating in an expanding lake. The glacier is …

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April 7, 2021

Bonar Glacier Retreat, New Zealand

Bonar Glacier in 1992 and 2021 Landsat image.  Red arrow is the 1992 reconstituted terminus location, yellow arrow the 2021 terminus location and purple dots the snowline. Bonar Glacier is on the west flank of Mount Aspiring flowing north from Mount before turning sharply west and descending towards a lake and draining into the Waipara River. The NIWA glacier monitoring program noted that  30 per cent of New Zealand’s ice that …

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March 30, 2021

Art and Science on the Easton Glacier: Reflections from the NCGCP 2020 Field Season

By: Cal Waichler, Jill Pelto, and Mariama Dryak.  It is the evening of Aug. 9th, 2020 and six of us are camped near the terminus of Easton Glacier. The sun has dropped below the moraine ridge above camp and a chilly breeze has forced us to put on layers. We are enjoying dinner cooked on our camp stoves, discussing what we observed on the ice today.  The toll of climate …

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March 25, 2021

Snow White Glacier, New Zealand Withers with Climate Change in 21st Century

Snow White Glacier in Landsat images from 2002, 2016 and 2021.  Point A is an alpine lake, Point B is  new proglacial lake location, Point C is lower icefall and Point D the Upper Icefall.  Blue arrows indicate glacier flow. The Snow White Glacier is in the Snow Drift Range and Olivine Wilderness in Mt Aspiring National Park, New Zealand. The glacier flows north from 2400 m on the slopes of …

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March 18, 2021

Bailang and Angge Glacier, China Retreat and Lake Expansion 1995-2020

Bailang (B) and Angge Glacier (A) in 1995 and 2020 Landsat images indicating retreat and lake expansion. Red arrow is the 1995 terminus location, yellow arrow the 2020 terminus location, purple arrow rock ridges that expand separating tributaries. Chubda Glacier (C) to the south and an unnamed glacier Point D between Angge and Bailang. Bailang Glacier and Angge Glacier, China are adjacent to the Chubda Glacier, Bhutan, They drain north from …

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March 12, 2021

Gorra de Nieve East Glacier, Chile Retreat-Lake Expansion

Gorra de Nieve East Glacier in 1986 and 2021 Landsat images. Red arrow is the 1986 terminus location, yellow arrow is the 2021 terminus location, orange arrows the three main tributaries. The Gorra de Nieve massif is 50 km southwest of Monte San Lorenzo, draining its eastern flank the largest glacier of this massif is unnamed and referred to here as Gorra de Nieve East Glacier. The glacier consists of …

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March 2, 2021

Nellie Juan Glacier Loses Contact with Contact Glacier, Alaska

Nellie Juan Glacier (NJ) and Contact Glacier (C) in 1986 and 2020 Landsat images. Red arrow is the 1986 terminus location of both glaciers. Yellow arrow marks the terminus location in 2020 after glacier separation and purple dots mark the upper limit of Contact glacier at that time. Nellie Juan Glacier is a tidewater outlet glacier of the Sargent Icefield, Alaska. Just after 1935 the glacier retreated from moraine shoal …

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February 24, 2021

HPN4 Glacier, Chile New Lake Forms and Drains in 2021

Glacier dammed lake formation at HPN4 Glacier, Chile between Landsat images of Feb. 2020 and Feb. 2021, yellow arrows indicating new calving fronts on either end of lake.  HPN4 Glacier drains the southern side of NPI just east of Steffen Glacier. The terminus retreated little from 1987-2015, see below (Pelto, 2015 and 2017). The main change is in the eastern tributary 1-2 km north of the terminus. In 1987 there were …

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February 17, 2021

Tres Puntas Glacier, Chile Loses 50% of its Length this Century

Tres Puntas Glacier, Chile in 1999 and 2021 Landsat imagery. Red arrow is 1999 terminus location, yellow arrow the 2021 location, Point A is where tributaries joined in 1999 and Point B is where an adjacent glacier drains west. Tres Puntas Glacier flow south from Cerro Tres Puntas draining south into Lago O’Higgins in Patagonia. The icefield is east of the Patagonia icefields where Davies and Glasser (2012) noted the …

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February 9, 2021

Potential Preconditioning for Landslide High 2020 Glacier Snow Lines in Rishi Ganga Basin, India 2020

The catastrophic landslide and resulting flood in the Rishi Ganga basin Uttarakhand, India on Feb. 7 was triggered on a formerly glaciated slope at 5600 m detailed in a blog post by Petley (2021). This event occurred after a post-monsoon season featuring high snowlines on adjacent glaciers and the warmest January in the last six decades  in Uttarakhand, India.   Glacier snowlines are a proxy for the elevation where melting predominates, were these preconditioning factors? Here we examine the elevation of the glacier snowlines in 2020.

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