Wasserschall

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Auf einem etwa 1,6 langem und gut 13 Meter tiefen Gletschersee: Mit Schallwellen wird der Seegrund untersucht.

Ian Howat and Twila Moon of the University of Washington in Seattle conduct a sonar survey of a melt lake on the surface of the Greenland Ice Sheet.

In July 2006, researchers afloat in a dinghy on a mile-wide glacial lake in Greenland studied features of the lake and ice 40 feet below. Ten days later the entire contents of the lake emptied through a crack in the ice with a force equaling the pummeling water of Niagara Falls. The entire process only took 90 minutes.

Observations before, during and after this swift, forceful event were collected and analyzed by a team led by Ian Joughin of the University of Washington in Seattle and Sarah Das of the Woods Hole Oceanographic Institution in Woods Hole.

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