TY  - JOUR
AU  - Andersen, O. B.
AU  - Hinderer, J.
PY  - 2005//
TI  - Global inter-annual gravity changes from GRACE: Early results
JO  - Geophysical research letters
VL  - 32
PB  - American Geophysical Union
KW  - 1217 Geodesy and Gravity: Time variable gravity
KW  - 1855 Hydrology: Remote sensing
KW  - 1640 Global Change: Remote sensing
KW  - 1655 Global Change: Water cycles
N2  - Fifteen monthly gravity field solutions from the GRACE twin satellites launched more than two years ago have been studied to estimate gravity field changes between 2002 and 2003.The results demonstrate that GRACE is capable of capturing the changes in ground water on inter-annual scales with an accuracy of 0.4 ?Gal corresponding to 9 mm water thickness on spatial scales longer than 1300 km. Four of the most widely used global hydrological models have been investigated for their spatial comparison with GRACE observations of inter-annual gravity field variations due to changes in continental water storage. The Global Land Data Assimilation System model has a spatial correlation coefficient with GRACE observations of 0.65 over the northern hemisphere. This demonstrates that the observed gravity field changes on these scales are largely related to changes in continental water storage.
SN  - 0094-8276
UR  - http://dx.doi.org/10.1029/2004GL020948
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=5596), last updated on Mon, 27 Apr 2009 15:39:52 +0200
ID  - Andersen+Hinderer2005
ER  -