March 26, 2017

Depot & Mondor Glacier Retreat, Antarctic Peninsula

Depot & Mondor Glacier Retreat, Antarctic Peninsula

Mondor and  (M) and Depot Glacier (D) at the tip of the Antarctic Peninsula in Landsat imagers from 1988, 2000 and 2017.  Yellow arrows indicates the 2017 terminus location of each.  The purple arrow indicates a bedrock ridge that has been expanding. On the Trinity Peninsula,which is the region at the tip of the Antarctic Peninsula, are Depot and Mondor that flow north and south from the same accumulation zone …

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March 22, 2017

Hallo Glacier Retreat, Katmai Alaska

Hallo Glacier Retreat, Katmai Alaska

Landsat images of Hallo Glacier in 1985 and 2015 indicating the 1985 terminus position red arrows and yellow dots indicate 2015/2016 terminus location.  Purple dots show the snowline Hallo Glacier is one of the larger glaciers in Katmai National Park draining east from Mount Steller and ending in an expanding proglacial lake east of Hallo Bay.  Hallo Bay is well known as a good location for brown bear watching (NPS).  Arendt …

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March 17, 2017

Bridge Glacier Terminus Collapse, BC, 4 km retreat 1985-2016

Bridge Glacier Terminus Collapse, BC,  4 km retreat 1985-2016

Bridge Glacier comparison in 1985 and 2016 Landsat Images.  Red arrow is the 1985 terminus, yellow arrow the 2016 terminus and purple arrows indicate locations where tributaries have separated between the two dates.  Bridge Glacier is an 17 km long outlet glacier of the Lillooet Icefield in British Columbia. The glacier ends in a rapidly expanding glacial lake and had an observed retreat rate of 30 m per year from …

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March 15, 2017

Klippi Glacier Retreat Causes Separation, British Columbia

Klippi Glacier Retreat Causes Separation, British Columbia

Klippi Glacier in Landsat images of 1987 to 2016. Red arrows indicate 1987 terminus, yellow arrows 2016 terminus and purple dots the transient snowline.  The glacier beings at 2600 m sharing a divide with Klinaklini Glacier, flowing northwest from Silverthrone Mountain and terminating at  1040 m in 1987. Klippi Glacier drains into the Machmell River, Owikeno Lake and then River Inlet on the British Columbia Coast. The Machmell River is …

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March 9, 2017

Cavagnoli Glacier, Switzerland Fading Away

Cavagnoli Glacier, Switzerland Fading Away

Google Earth image of Cavagnoli in 2010 and a Sentinel 2 image from Sept. 9  2016.  Ice masses are numbered.  No retained 2016 snowpack, note the lighter colored snow on the upper Basodino Glacier Cavagnoli Glacier (Ghiacciaio dei Cavagnöö) drains south into Lago dei Cavagnoli (Lago dei Cavagnöö), which is impounded by a dam that is 111 meters high.  The glacier like its neighbor Basodino Glacier  is in the Ticino River …

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March 7, 2017

Basodino Glacier, Switzerland Mass Balance Loss & Hydropower

Basodino Glacier, Switzerland Mass Balance Loss & Hydropower

Basodino Glacier in August and September of 2016 illustrating the upward shift of the snowline in the 15 days between the Landsat (left) and Sentinel (right) image. purple dots mark snowline.  Basodino Glacier is a small northeast facing slope glacier in the southern Swiss Alps.  The glacier is in the Ticino River watershed and supplies the Robiei Hydropower system. The glacier is in the same basin as Cavagnoli Glacier, which …

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March 1, 2017

Trinity-Wykeham Glacier Retreat, Causing Separation, Ellesmere Is. Canada

Trinity-Wykeham Glacier Retreat, Causing Separation, Ellesmere Is. Canada

Trinity (T) and Wykeham (W) Glacier in 1999 and 2016 Landsat images.  Red arrow indicates 1999 margin, yellow arrow 2016 margin, yellow dots the actual ice front.  Trinity (T) and Wykeham (W) Glacier flow east from Ellesmere Island into a fjord off of Nares Strait.  Until recently the two have been joined just before the terminus. Millan et al (2017) observed glaciers in the region.  They noted a change  in ice …

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February 27, 2017

A River Runs 40 km Across the Greenland Ice Sheet

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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February 24, 2017

Shoup Glacier, Alaska Retreat, Thinning, Velocity Decline

Shoup Glacier, Alaska Retreat, Thinning, Velocity Decline

Shoup Glacier comparison in 1986 and 2016 Landsat images.  The glacier retreated 1900 m in this interval.  Red arrow is 1986 terminus, yellow arrow the 2016 terminus, green arrow rock rib emerging from beneath glacier, purple dots a landslide deposit, and purple arrow the snowline. Shoup Glacier is between the Columbia Glacier and Valdez draining from the Chugach Mountains in southern Alaska.  The glacier was a tidewater terminating glacier until …

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February 21, 2017

Sulmeneva Glacier Retreat from Lakes, Novaya Zemlya

Sulmeneva Glacier Retreat from Lakes, Novaya Zemlya

Sulmeneva Glacier retreat in comparison of 1999 and 2016 Landsat images. Red arrow indicate the 1999 terminus position and yellow arrows 2016 terminus location.  Sulmeneva Bay is on the west coast of Novaya Zemlya and is the southern most extent of the continuous glaciation that extends along the northern half of the island.  Here we examine an unnamed glaciers that terminates in a piedmont lobe near the shore of Sulmeneva Bay. The …

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