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 …


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 …


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 …


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 …


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 …


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 …


January 3, 2018

Tajuco Glacier Lake, China Expands with Glacier Retreat

Tajuco Glacier terminating in Tajuco Lake retreat in 1994 and 2017 Landsat comparison. Red arrow is 1997 terminus location, yellow arrow is the 2017 terminus location and the purple dots are the snowline in 2017.  Tajuco Glacier Lake is a moraine dammed glacier lake in the Tingri district of China.  It drains into the Amur River which flows south into Nepal. Shijin et al (2015) reported on the expansion of …


December 21, 2017

Queulat Norte Glacier, Chile Retreat Creates Two Lakes

 Queulat Norte Glacier in 1987, 2000 and 2016 Landsat images indicating retreat from 1987 (red arrow) to 2016 (yellow arrow). Green arrow indicates former tributary, orange arrow area of  new bedrock exposure and pink arrow expanding medial moraine. Two new lakes have formed due to the 1950 m retreat.  Nevado Queulat, Chile is the centerpiece of the Queulat National Park in the Aysen Region.  The largest glacier draining the substantial ice …


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 …


December 12, 2017

From a Glaciologists Perspective AGU Day 2

It has been 30 years since my first experience at the AGU, at that time glaciology and the cryosphere played a small role.  Today that is clearly not the case.  Today just a glimpse of a few of the many interesting glaciers studies are provided to again illustrate the vast array and amazing detail of work being conducted. Samiah Mustafa, Brown University presented research looking at the ability of a …