ICESat-2 time series improve the accuracy of Greenland's subglacial bed topography mapping

Mathieu Morlighem, Dartmouth College, Department of Earth Sciences, Hanover, NH, United States, Michael Wood, JPL/NASA/Caltech, Pasadena, CA, United States, Helene L Seroussi, Dartmouth College, Thayer School of Engineering, Hanover, NH, United States and Nicole Schlegel, NASA Jet Propulsion Laboratory, Pasadena, United States