1)Key Laboratory of Dynamical Geodesy, Institute of Geodesy and Geophysics, CAS, Wuhan 4300772)Graduate School of Chinese Academy of Science, Beijing 100049
Abstract：The relation between gravity variations, vertical displacement variations and the major environment factors is studied by using the continuous observational data with superconducting gravimeter and GPS at Wuhan station. According to the surface loading theories of classical elasticearth the contributions to the gravity and vertical displacement from atmosphere loading, nontidal oceanic mass and continental water loading were simulated and calculated. The numerical results show that the annual amplitude variations of gravity and vertical displacement are mainly caused by abovedmetioned three kinds of environment factors, the contributions are 90% and 75% respectively. At present the global assimilation models of land water such as LaD and GLDAS cannot objectively reflect realtime changes in water storage in the site of local stations, as there is timedelay between calculated values and observations.
