HR: 1340h
AN: G33B-0037    [Abstracts]
TI: Hydrology and oceanic contributions to seasonal gravity changes recovered from the GRACE mission
AU: * Boy, J
EM: jpboy@eost.u-strasbg.fr
AF: Institut de Physique du Globe de Strasbourg, 5, rue Rene Descartes, Strasbourg, 67084 France
AU: Hinderer, J
EM: Jacques.Hinderer@eost.u-strasbg.fr
AF: Institut de Physique du Globe de Strasbourg, 5, rue Rene Descartes, Strasbourg, 67084 France
AU: de Linage, C
EM: caroline.de-linage@eost.u-strasbg.fr
AF: Institut de Physique du Globe de Strasbourg, 5, rue Rene Descartes, Strasbourg, 67084 France
AU: Lemoine, F G
EM: Frank.G.Lemoine@nasa.gov
AF: Space Geodesy Laboratory, Code 697, NASA Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Luthcke, S B
EM: Scott.B.Luthcke@nasa.gov
AF: Space Geodesy Laboratory, Code 697, NASA Goddard Space Flight Center, Greenbelt, MD 20771 United States
AB: Seasonal gravity field variations are mostly induced by changes in continental water storage, and to a smaller extent, oceanic circulation. These gravity variations are now monitored, with unprecedented spatial and temporal resolution from the GRACE mission. We compare different GRACE solutions, (e.g. spherical harmonics or mascons) to several modern hydrological (LaDworld, GLDAS and NLDAS, ECMWF, etc.) and operational ocean (ECCO, MERCATOR, etc.) models. We quantify the possibility of capturing small and regional wavelength features present in these hydrological and oceanic models. We are also comparing the (dis-)agreement between GRACE recovered gravity field and the hydrological and oceanic models, to the (dis-)agreement between other ground geodetic observations (VLBI, GPS, superconducting gravimeter) and the computed loading from the same models.
DE: 1217 Time variable gravity (7223, 7230)
DE: 1223 Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions (0762, 1218, 3319, 4550)
DE: 1225 Global change from geodesy (1222, 1622, 1630, 1641, 1645, 4556)
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
SC: Geodesy [G]
MN: Fall Meeting 2005