HR: 0800h
AN: U21C-0616 [Abstracts]
TI: Monthly land waters solutions by least-squares inversion of GRACE geoid data (2002- 2006)
AU: * RAMILLIEN, G
EM: Guillaume.Ramillien@legos.obs-mip.fr
AF: LEGOS UMR5566 CNRS/CNES/IRD/SHOM/UPS, 14, Avenue Edouard Belin, Toulouse, F-
31400, France
AU: GROUSSET, I
EM: Isabelle.Grousset@cnes.fr
AF: LEGOS UMR5566 CNRS/CNES/IRD/SHOM/UPS, 14, Avenue Edouard Belin, Toulouse, F-
31400, France
AU: LLOVEL, W
EM: William.Llovel@legos.obs-mip.fr
AF: LEGOS UMR5566 CNRS/CNES/IRD/SHOM/UPS, 14, Avenue Edouard Belin, Toulouse, F-
31400, France
AU: CAZENAVE, A
EM: Anny.Cazenave@cnes.fr
AF: LEGOS UMR5566 CNRS/CNES/IRD/SHOM/UPS, 14, Avenue Edouard Belin, Toulouse, F-
31400, France
AU: FLECHTNER, F
EM: flechtne@gfz-potsdam
AF: GeoForschungsZentrum (GFZ) Potsdam
Department 1 Geodesy & Remote Sensing, Muenchner Strasse
Wessling, Oberpfaffenhofen, D-82234, Germany
AU: SCHMIDT, R
EM: rschmidt@gfz-potsdam.de
AF: GeoForschungsZentrum (GFZ) Potsdam
Department 1 Geodesy & Remote Sensing, Muenchner Strasse
Wessling, Oberpfaffenhofen, D-82234, Germany
AB:
A least-squares inversion procedure is used to derive the Land Waters (LW) variations at the resolution of ~400
km by combining: (1) monthly GRACE solutions from August 2002 to February 2007 recently made available by
GFZ; and (2) a priori information from hydrology models. This approach proves to be an efficient strategy to
separate different hydrological components (i.e., continental water storage included snow) from other
geophysical phenomena, residual errors and high-frequency noise. Time-series of continental water storage for
large drainage basin can be derived from these LW solutions, and proved to be consistent in comparison with
sparse in situ measurements of water levels and global hydrology models. A posteriori uncertainties on the
estimated LW coefficients and errors from spectrum truncation and leakage can also be computed.
DE: 1217 Time variable gravity (7223, 7230)
DE: 1218 Mass balance (0762, 1223, 1631, 1836, 1843, 3010, 3322, 4532)
DE: 1655 Water cycles (1836)
SC: Union [U]
MN: 2007 Fall Meeting