Evolution and characterization of drought events from GRACE and other satellite and observation.

Meng Zhao1, Geruo A2, Isabella Velicogna1 and John S Kimball3, (1)University of California Irvine, Irvine, CA, United States, (2)University of California Irvine, Department of Earth System Science, Irvine, United States, (3)University of Montana, Numerical Terradynamic Simulation Group, College of Forestry & Conservation, Missoula, MT, United States