Scientists study Greenland melting dynamics
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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 eventually to deploy scores of the devices to measure ice loss in Greenland. BRENNAN LINSLEY / THE ASSOCIATED PRESS
