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May 10, 2016
Glacier Nef, Patagonia, Chile retreat 1987-2016.
Comparison of 1987 and 2015 Landsat images of Nef Glacier at right and Cachet Glacier at left. Indicating retreat of Nef Glacier from red arrows to yellow arrows of 1.8 km and development of a new lake at the terminus. Purple arrows indicate upglacier thinning leading to separation of glacier tributaries. Glacier retreat and thinning is particularly strong in the Patagonian icefields of South America. The two largest temperate ice bodies of …
February 15, 2016
San Quintin Glacier, Chile terminus disintegration 1987-2015
Landsat comparison of San Quintin Glacier in 1987 and 2015: red arrow indicates 1987 terminus location, yellow arrow indicates 2015 terminus location of the three main termini, and the purple arrow indicates upglacier thinning. San Quintin is the largest glacier of the NPI at 790 km2 in 2001 (Rivera et al, 2007). The glacier extends 50 km from the ice divide in the center of the ice cap. The peak …
October 13, 2015
Colonia Glacier, Chile Retreat and Periodic Lake Outbursts
Comparison of 1987 and 2015 Landsat images indicating retreat from red arrows to yellow arrows of 2.5 km and development of a new lake at the terminus. orange arrow indicates glacier dammed lake that fills and empties periodically. Colonia Glacier drains east from the Northern Patagonia Icefield feeding the Baker River, Chile. It is the largest glacier draining east from the NPI. A comparison of the 1987 and 2015 images indicate …
September 21, 2015
Acodado Glacier, Chile Rapid Retreat 1987-2015
Landsat image comparison 1987 and 2015 Loriaux and Casassa (2013) examined the expansion of lakes of the Northern Patagonia Ice Cap. From 1945 to 2011 lake area expanded 65%, 66 square kilometers. Rio Acodado has two large glacier termini at its headwater, HPN2 and HPN3. that are fed by the same accumulation zone and comprise the Acodado Glacier. The glacier separates from Steffen Glacier at 900 m. The lakes at …
March 16, 2014
Reichert Glacier Rapid Retreat, Northern Patagonia Icefield, Chile
Reichert Glacier (Reicher) is at the northwest corner of the North Patagonia Icefield (NPI) and flows west from the Mont Saint Valentin region and ends in the expanding Reicher Lake. Rivera et al (2007) notes that the glacier was named for French geologist Federico Reichert, but that Reicher has ended up as the established spelling. They further note that the glacier lost 4.2 square kilometers of area from 1979 to …
Dean of Academic Affairs at Nichols College and Professor of Environmental Science at Nichols College in Massachusetts since 1989. Glaciologist directing the North Cascade Glacier Climate Project since 1984. This project monitors the mass balance and behavior of more glaciers than any other in North America.