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In this July 19, 2011 photo, attached by rope to a waiting helicopter, researcher Carl Gladish walks back after deploying a GPS seismometer, or GeoPebble, to track glacial movement on Jakobshavn Glacier, near Ilulissat, Greenland. Chief researcher David Holland, hopes to eventually deploy scores of the devices to measure ice loss in Greenland. (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.