HR: 1340h
AN: G33B-0044    [Abstracts]
TI: Global Surface Mass Variations From Geodetic Data Combination
AU: * Wu, X
EM: Xiaoping.Wu@jpl.nasa.gov
AF: Jet Propulsion Laboratory, CALTECH, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Heflin, M B
EM: mbh@mail.jpl.nasa.gov
AF: Jet Propulsion Laboratory, CALTECH, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Ivins, E R
EM: eri@fryxell.jpl.nasa.gov
AF: Jet Propulsion Laboratory, CALTECH, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Fukumori, I
EM: if@pacific.jpl.nasa.gov
AF: Jet Propulsion Laboratory, CALTECH, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AB: Global surface mass variations including hydrological activities on land, ice mass imbalance, and non-steric sea level change, have significant implications on climate change and the lives of the world community. These variations also result in multiple geodetic signatures placing the geodetic discipline at the forefront of research on this important process. The successful launch and operation of the GRACE gravity mission have marked a revolutionary transition from local and component measurements to global high resolution mass transport monitoring. GRACE's time-variable gravity fields, GPS deformation measurements, and an altimeter and other data assimilated ocean bottom pressure model contain overlapping and complementary information. We use these different types of data separately and in combination to validate and achieve better results. The combination of GRACE/GPS/OBP over 18 months has yielded high-quality monthly degree-1 surface mass estimates with an equivalent precision of 0.5 mm in all three components of annual geocenter motion. Full spectrum results up to degree and order 50 using different combination strategies will also be reported in this presentation.
DE: 1211 Non-tectonic deformation
DE: 1217 Time variable gravity (7223, 7230)
DE: 1240 Satellite geodesy: results (6929, 7215, 7230, 7240)
DE: 1641 Sea level change (1222, 1225, 4556)
SC: Geodesy [G]
MN: Fall Meeting 2005