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《Journal of Geodesy and Geodynamics》 2009-03
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ENVIRONMENTAL EFFECTS ON GRAVITY AND VERTICAL DISPLACEMENT OBSERVATION AT WUHAN STATION

Zhou Hongwei1,2),Xu Jianqiao1),Sun Heping1) and Zhou Jiangcun1)1)Key Laboratory of Dynamical Geodesy,Institute of Geodesy and Geophysics,CAS,Wuhan 4300772)Graduate School of Chinese Academy of Science,Beijing 100049  
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 elastic-earth the contributions to the gravity and vertical displacement from atmosphere loading,non-tidal 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 aboved-metioned 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 real-time changes in water storage in the site of local stations,as there is time-delay between calculated values and observations.
【Fund】: 中国科学院知识创新重要方向项目(KZCX2-YW-133);; 国家自然科学基金重点项目(40730316)
【CateGory Index】: P223
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【Citations】
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