Contact: George Hale
NASA/Goddard Space Flight Center
Caption: Hidden for all of human history, a 460-mile-long canyon has been discovered below Greenland's ice sheet. Using radar data from NASA's Operation IceBridge and other airborne campaigns, scientists led by a team from the University of Bristol found the canyon runs from near the center of the island northward to the fjord of the Petermann Glacier.
A large portion of the data was collected by IceBridge from 2009 through 2012. One of the mission's scientific instruments, the Multichannel Coherent Radar Depth Sounder, operated by the Center for the Remote Sensing of Ice Sheets at the University of Kansas, can see through vast layers of ice to measure its thickness and the shape of bedrock below.
This is a narrated version of an animation that can be found, along with more detailed information, here:
Greenland's Mega-Canyon beneath the Ice Sheet (id 4097)
Credit: NASA SVS
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Related news release: NASA data reveals mega-canyon under Greenland Ice Sheet