Neil Humphrey (left), a UW professor of geology and geophysics, and Nathan Maier, a UW geology Ph.D. student, pose on the Greenland Ice Sheet during 2017 field research. The two wrote a paper, titled “Sliding Dominates Slow-Flowing Margin Regions, Greenland Ice Sheet,” that was published July 10 in Science Advances. (Neil Humphrey Photo)
Ice on the Greenland Ice Sheet doesn’t just melt. The ice actually slides rapidly across its bed toward the ice sheet’s edges. As a result, because ice motion is from sliding as opposed to ice deformation, ice is being moved to the high-melt marginal zones more rapidly than previously thought.