HR: 1340h
AN: G33A-0029    [Abstracts]
TI: The European Gravity Field 2002-2005 from GRACE and GGP Data
AU: * Crossley, D
EM: crossley@eas.slu.edu
AF: Saint Louis University, Earth and Atmospheric Sciences 3507 Laclede Avenue, St. Louis, MO 63103 United States
AU: Hinderer, J
EM: Jacques.Hinderer@eost.u-strasbg.fr
AF: Institut de Physique du Globe de Strasbourg, CNRS-ULP UMR 7516 5, rue Descartes, Strasbourg Cedex, 67084 France
AU: Boy, J
EM: jpboy@eost.u-strasbg.fr
AF: Institut de Physique du Globe de Strasbourg, CNRS-ULP UMR 7516 5, rue Descartes, Strasbourg Cedex, 67084 France
AU: Wilmes, H
EM: herbert.wilmes@bkg.bund.de
AF: Bundesamt fr Kartographie und Geod„sie, Richard-Strauss-Allee 11, Frankfurt/Main, D-60598 Germany
AU: Kroner, C
EM: corinna.kroner@uni-jena.de
AF: Institut fr Geowissenschaften, FSU Jena Burgweg 11, Jena, D-07749 Germany
AU: Meurers, B
EM: bruno.meurers@univie.ac.at
AF: University of Vienna, Department of Meteorology and Geophysics Althanstrasse 14, Wien, A - 1090 Austria
AB: This paper continues the study of the European gravity field as determined simultaneously from the GGP network of superconducting gravimeters and from the GRACE satellites. The period of study is from August 2002 to 2005 (as data is available) and covers the region between Membach (eastern Belgium), Vienna, and Medicina (northern Italy); during the last year, station Bad Homburg in western Germany has been added to make a total of 7 stations. As in previous similar studies, we combine the gravity residuals from the ground stations to make a smoothed map of the gravity field every 15 days and compare it to the GRACE field snapshots over the same area. Comparisons are done using both EOF principal component analysis and MSSA for both data sets. We confirm the predominance of annual signals and also examine the trends in GRACE and ground absolute gravity measurements to find the limiting secular change detectable in the data. Our primary goal is to correlate both data sets with hydrological models using meteorologically driven snow and soil moisture estimates for Europe, as well as hydrological observations and GPS results at the gravity sites, where available. We show the relationship between the sign of the hydrology signal, separated into attraction and loading, and the local topography surrounding each station.
DE: 1209 Tectonic deformation (6924)
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: 1242 Seismic cycle related deformations (6924, 7209, 7223, 7230)
DE: 1295 Integrations of techniques
SC: Geodesy [G]
MN: Fall Meeting 2005