Nadir videos taken during low-altitude transects of the Arctic Network of national park units and Selawik National Wildlife Refuge, Alaska, July 2013

Nadir videos shot from a GoPro Hero3 Black Edition (focal length 2.77 mm) of the arctic landscape during low altitude transects at the rate of 60 frames per second. Transects were conducted from small aircraft over the National Park Service’s Bering Land Bridge National Preserve and the U.S. Fish and Wildlife Service’s Selawik National Wildlife Refuge in northwest Alaska.