Dr. Eric Rignot is the principal scientist for the Radar Science and Engineering section at NASA's Jet Propulsion Laboratory in Pasadena, Calif., and a professor of Earth System Science at the University of California, Irvine. He specializes in radar interferometry and polarimetry as applied to the geosciences. Rignot also is the principal investigator on several NASA-funded projects, investigating the Greenland and Antarctic ice sheets, interactions between ice shelves and the ocean and the retreat of glaciers in Patagonia. He's a member of the American Geophysical Union and the International Glaciological Society, and is frequently interviewed by the media.

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