9 / 54
In this July 15, 2011 photo, atop roughly two miles of ice, with sleeping tents visible in the background, Dartmouth College engineering graduate Suk-Joon Lee helps test a prototype wheeled Arctic robot being developed for long-range instrument deployment, at Summit Station, a small U.S. National Science Foundation research center situated 10,500 feet above sea level, on top of the Greenland ice sheet. Across Greenland's vast white landscape, small teams of researchers from around the world are searching for clues to the potential effects of global warming on Greenland's ice. (AP Photo/Brennan Linsley)

Greenland's ice: beauty and threat

Greenland's Inuit people have countless terms in their language to describe ice in all its varieties. This gallery of photographs by AP's Brennan Linsley likewise is something of a visual vocabulary for the striking and beautiful forms ice takes on and around the giant Arctic island.