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You are browsing the archive for Glacier Observations Archives - From a Glacier's Perspective.

September 12, 2019

Glacier Crevasses As A learning Tool

Guest Post by Clara Deck Instagram: @scienceisntsoscary   Crevasses on mountain glaciers are large cracks in the ice which often propagate from the surface downward. The initial break will happen when stress exceeds the inherent ice material strength. This article will focus on surface crevasses, though this basic physical understanding also applies to basal crevasses or large-scale rifts in ice sheet and shelf settings.   In mountain glacier systems, crevassing …

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December 13, 2018

AGU Poster Hall-Cryosphere Perspectives

The American Geophysical Union Fall meeting’s Cryosphere section continues to grow as seen in the Poster hall.  The poster hall is where most of the research is presented and is dominated by student work.  Here are some examples of this work. Erin McConnell, UMaine and others examined shallow ice cores from glaciers in the St. Elias Mountains of Canada’s Yukon as part of a project to reconstruct past climate variability …

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November 19, 2018

35th Annual Field Observations of North Cascade Glaciers

The 2018 field season observations, conditions and summary. Field team Mariama Dryak, Erin McConnell, Jill Pelto and Mauri Pelto. For the 35th consecutive year I headed to the North Cascade Range, Washington to monitor the response of glaciers to climate change.  Two of the glaciers the North Cascade Glacier Climate Project (NCGCP) monitors are now part of the 42 glaciers comprising the World Glacier Monitoring Service  (WGMS) reference glacier network, …

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March 6, 2018

Rio Engaño, Chile Headwater Glacier Retreat GLOF Threat Drops

Comparison of glaciers at the headwaters of Rio Engaño in 1984 and 2018 Landsat images. The 1984 terminus location with red arrows, yellow arrows the 2018 terminus location, purple arrows wind drift patterns. Rio Engaño drains into Lago General Carrera and its headwaters is a group of alpine glaciers.  In March of 1977 one of the glaciers, generated a glacier lake outburst flood (GLOF) that reached a depth of 1.5 m  at the …

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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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December 14, 2017

From a Glaciologists Perspective AGU Day 3

Snapshot of day 3  of Glaciology poster presentations at AGU.  The amount of glaciology research is impressive, there is much we do not know.  We can no longer say that we know very little about any aspect or region.  Before saying that explore the vast literature that is now available. Jeff La Freniere at Gustavus Adolphus College used several new technologies,  aerial and terrestrial LIDAR and structure-from-motion photogrammetry from drones …

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August 14, 2017

Canadian Columbia River Basin Winter 2016-2017: A Late Rally

Guest Post by Ben Pelto, PhD Candidate, UNBC Geography, [email protected] As the summer ticks by and the fall glacier field season approaches, I’ve realized that I never put out a winter 2016-2017 synopsis, so, like the snowfall this year, it’s arrived late. May 2017, Jesse Milner of the ACMG on the Nordic Glacier in front of the “meteor strike” a newly exposed rock face that spalls ice regularly. Photo by …

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June 27, 2017

Mensu Glacier, Siberia Russia Retreat 1994-2016

Mensu Glacier, Russia in comparison of 1994 and 2016 Landsat images.  Red arrow is the 1994 terminus, yellow arrow 2016 terminus, purple arrow a tributary and purple dots the snowline.  Mensu Glacier (Lednik Mensu) drains northeast from Gora Belukha in the Russian Altai.  The glacier drains into the Ob River and then the Arctic Ocean.  This glacier has not been the focus of detailed research to date. Khromova et al (2014) report …

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June 5, 2017

Llewellyn Glacier, BC Proglacial Lake Merging From Retreat

Llewellyn Glacier comparison in 1984 Landsat and 2016 Sentinel images.  Red arrows the 1984 terminus locations for proglacial lakes A-D, yellow arrows the 2016 terminus locations for A and B. Point E was the peninsula separating proglacial lakes A and B, which are now joined due to glacier retreat.  The second largest glacier of the Juneau Icefield is the Llewellyn Glacier which is in British Columbia. The Juneau Icefield Research …

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February 27, 2017

A River Runs 40 km Across the Greenland Ice Sheet

Supraglacial stream, on July 26, 2016 Landsat image, stretching 40 km across the ice sheet from the transient snowline, which marks the boundary between the percolation zone and the wet snow zone,  west toward the ice sheet margin, note black arrows.   The Greenland Ice Sheet has experienced a significant increase in surface melt.  This is due both to warmer temperatures and enhanced melt due to a reduction in reflectivity-albedo. The expansion …

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