Using NASA’s GRACE and SMAP satellites to measure human impacts on the water cycle

John T Reager II, Jet Propulsion Laboratory, Pasadena, CA, United States, Stephanie Castle, University of California Irvine, Irvine, CA, United States, Michael Turmon, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, James S. Famiglietti, NASA Jet Propulsion Laboratory, Pasadena, CA, United States and Severine Fournier, NASA Jet Propulsion Laboratory, Pasadena, United States