>Nick Cobbing, United Kingdom, for Greenpeace International.Glaciologists tow an ice-sounding radar between kayaks along a melt-water ravine on Petermann Glacier, Greenland. The radar scans the changing | structure, the thickness and melt rates at the base of the glacier, data vital in making predictions about how an influx of glacial melt water into the ocean might affect rises in sea level. | |
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