Operational System for Estimating Compaction of Arctic Glacial Firn and Surface Mass Balance

James M Crowell, Arizona State University, Tempe, AZ, United States, Alberto Behar, NASA Jet Propulsion Laboratory, (deceased), Pasadena, CA, United States, Ian Howat, Ohio State University, Byrd Polar & Climate Research Center, Columbus, United States, Santiago de la Peña, Byrd Polar Research Center, Columbus, OH, United States and Jekan Thanga, Arizona State University, School of Earth and Space Exploration, Tempe, AZ, United States