Isabella Velicogna is a Professor of Earth System Sciences at the University of California Irvine and a Faculty Part time at NASA/Caltech鈥檚 Jet Propulsion Laboratory, Pasadena, CA. She uses novel geophysical methods and satellite remote sensing techniques to understand the physical processes governing ice sheet mass balance and the hydrologic cycle of high latitude regions, with an emphasis on time-variable gravity from the Gravity Recovery and Climate Experiment (GRACE) mission, follow-on gravity missions, and other geophysical data (GPS, precipitation reanalysis, laser altimetry, regional climate models, and in situ observations).