There is a scene in the documentary “Chasing Ice” that shows the edge of the massive Ilulissat glacier in Greenland collapsing — or “calving” — and violently crashing into the sea below. The piece of ice that breaks away is compared to the size of lower Manhattan and appears taller than any building there.
The video of the glacier, also called by its Danish name, Jakobshavn, is what photographer James Balog calls “irrefutable” evidence of climate change. Balog is the subject of “Chasing Ice,” which won the Excellence in Cinematography Award at the 2012 Sundance Film Festival.
Filmmaker Jeff Orlowski followed Balog as he set up more than 20 time-lapse cameras in remote locations around Alaska, Montana, Nepal, Iceland and Greenland to capture images of Arctic glaciers as they change. Balog designed each camera to withstand extreme conditions, including sub-zero temperatures and 150 mph winds, and to snap about 8,000 frames a year, some of which have been featured in National Geographic magazine.
In an interview with The Associated Press, Orlowski and Balog talked about the film and their experiences making it.