HR: 1340h
AN: H23D-1156    [Abstracts]
TI: Comparison of Global Continental Hydrology Models Using Low Degree Time Variable Gravity Measurements
AU: * Quinn, K J
EM: katy.quinn@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91009 United States
AU: Dickey, J O
EM: jean.dickey@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91009 United States
AU: Marcus, S L
EM: steven.marcus@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91009 United States
AU: Fukumori, I
EM: if@pacific.jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91009 United States
AB: Changes in the distribution of mass within the Earth system produce variations in the Earth's gravity field. This redistribution of mass is largely due to movement of water between and within the atmosphere, hydrosphere, cryosphere, and ocean. While we have good models of the mass distribution of the atmosphere and ocean, the hydrology models are less well determined. Observations of the Earth's time variable gravity field can help to validate the hydrology models. The models we have been investigating are the hydrology fields from the National Centers for Environmental Prediction (NCEP) and the European Centre for Medium-Range Weather Forecasts (ECMWF) reanalyses, the Land Dynamics (LaD) model, the Variable Infiltration Capacity model (VIC), the NOAA Climate Prediction Center (CPC) soil moisture model, the International Satellite Land-Surface Climatology Project (ISLSCP) snow climatology, and the Global Land Data Assimilation System (GLDAS) model. Comparisons of geodetic observations of gravity to the climate forcing estimates have been made on a variety of timescales. We will present the results of these comparisons and discuss the implications for evaluating which hydrology models are best suited for geodetic studies.
DE: 1655 Water cycles (1836)
DE: 1800 HYDROLOGY
DE: 1223 Ocean/Earth/atmosphere interactions (3339)
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting