HR: 1340h
AN: H23D-1159    [Abstracts]
TI: Water Balance Estimates From GRACE Measurements of Time-Variable Gravity
AU: * Wahr, J
EM: wahr@lemond.colorado.edu
AF: Deptartment of Physics and CIRES, University of Colorado, Campus Box 390 University of Colorado, Boulder, CO 80309-0390 United States
AU: Swenson, S
EM: swensosc@lemond.colorado.edu
AF: Deptartment of Physics and CIRES, University of Colorado, Campus Box 390 University of Colorado, Boulder, CO 80309-0390 United States
AU: Velicogna, I
EM: isabella@lemond.colorado.edu
AF: Deptartment of Physics and CIRES, University of Colorado, Campus Box 390 University of Colorado, Boulder, CO 80309-0390 United States
AB: The GRACE satellite mission is now providing regular, monthly solutions for the Earth's gravity field. Two years of solutions are available as of this writing, and more months continue to be generated as the data become available. We have used the time-variable component of these solutions to compute month-to-month changes in the large-scale distribution of water storage. We have combined our results with river discharge data to estimate precipitation minus evapotranspiration over large river basins. We have developed methods of quantifying the uncertainties in all these results. In this talk we will discuss these estimates and their uncertainties, and compare with appropriate hydrological models.
DE: 1818 Evapotranspiration
DE: 1833 Hydroclimatology
DE: 1836 Hydrologic budget (1655)
DE: 1854 Precipitation (3354)
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting