Muir and Riggs Glaciers, Muir Inlet, Alaska - 2004

The second repeat photograph documents significant changes that have occurred during the 63 years between photographs A and C, and during the 54 years between photographs B and C. Muir Glacier has retreated out of the field of view and is now more than 7 kilometers northwest. Riggs Glacier has retreated as much as 600 meters and thinned more than 250 meters. Note the dense vegetation that has developed on White Thunder Ridge. Also note the correlation between Muir Glacier’s 1941 thickness and the trimline on the left side of this photograph. (Bruce Molnia).