mspelto

mspelto

Professor of Environmental Science at Nichols College since 1989. Director of North Cascade Glacier Climate Project since 1983.

Recent Articles

Glacier Crevasses As A learning Tool

Guest Post by Clara Deck Instgram: @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…

Alpine Glaciers-BAMS State of Climate 2018

Figure 1. Global Alpine glacier annual mass balance record of reference glaciers submitted to the World Glacier Monitoring Service, with a minimum of 30 reporting glaciers. For the last decade I have written the section on Alpine Glaciers for the…

Zaroshkul Glacier Retreat, Tajikistan

Zaroshkul Glacier in 1994 and 2018 Landsat imagery. Z=Zaroshkul Lake, A=Developing lake, red arrow=1994 terminus, yellow arrow=2018 terminus and purple dots=snowline. Zaroshkul Lake is in the midst of the Pamir Range, Tajikistan and is surrounded by glacier clad mountains.  Here…

Northern Patagonia Icefield High Equilibrium Line Altitude in 2019

Northern Patagonia Icefield Landsat view on 4/6/2019. Transient snowline indicated on individual glaciers with purple dots. Clockwise, L=Leones, So=Soler, N=Nef, Ca=Cachet, Co=Colonia,  PN=Pared Nord, PS=Pared Sur, H4=HPN4, St=Steffen, A=Acodado, B=Benito, H1=HPN1, Sq=San Quintin. The Northern Patagonia Icefield from 1987-2015 decreased…

Nakonake Glaciers, BC Retreat Two are Disappearing

Nakonake Glaciers in 1984 and 2018 Landsat images. Nakonake Glaciers are NW=Northwest, N=North, M=Middle, S=South, SE=Southeast.  Red arrows indicate the 1984 terminus position of the North and Middle Nakonake Glaciers.  Yellow arrows indicate the 2018 terminus location of each. Purple…