Comparing photographs of glaciers from the 1920's to today: Repeat photography is a technique in which a historical photograph and a modern photograph, both having the same field of view, are compared and contrasted to quantitatively and qualitatively determine their similarities and differences. The following sections depict how this technique was used at a number of locations in Alaska... to document and understand changes to glaciers and landscapes as a result of changing climate. [more inside]
"It's like watching 'Manhattan breaking apart in front of your eyes', says filmmaker James Balog. He's describing the largest iceberg calving ever filmed, as featured in his movie, Chasing Ice."