收稿日期: 2001-04-02
修回日期: 2001-06-14
网络出版日期: 2002-02-01
基金资助
国家杰出青年科学基金“全球地球动力学的重力效应综合研究”（编号：49925411）；国家自然科学基金“国际超导重力仪观测资料分析与研究”（编号：49774223）；中国科学院知识创新工程项目“中国大陆形变场和重力场时空变化及其动力学机制研究”（编号：KZ952-J1-411）资助.
CORRECTION PROBLEM OF THE OCEAN LOADING SIGNALS ON GRAVITY MEASUREMENTS AT FUNDAMENTAL STATIONS IN CRUST MOVEMENT OBSERVATION NETWORK IN CHINA
Received date: 2001-04-02
Revised date: 2001-06-14
Online published: 2002-02-01
周江存 , 孙和平 . 中国地壳运动观测网络基准站重力场变化的海潮负荷信号改正问题[J]. 地球科学进展, 2002 , 17(1) : 39 -43 . DOI: 10.11867/j.issn.1001-8166.2002.01.0039
The main purposes for the observation network of the crust movement in China are to detect and to study the variation laws of the various geophysical fields induced by crust movement, to serve further disaster reduction and environmental protect, to provide important basic observations and background information, therefore the realization of this research project processes very important application prospects. Now it is possible to study the detail structure of the gravity filed due to the improvement of theoretical models and the wide use of the GWR superconducting and of the FG-5 absolute gravimeters with high precision. Researches show that it is obviously important to study the oceanic influence when to determine the Earth's tidal parameters, to study inversely the structure of the crust and upper mantle, to check the movement of the Earth's core, to estimate the resonance parameters of the nearly diurnal free wobble (NDFW) and to study the gravity change due to the Earth's rotation and polar motion.
Based on the most recent global ocean tidal maps (Csr 3.0，Fes 95.2，Tpxo 2 and Csr 4.0) and the old Schwiderski (Scw 80) ones, ocean tidal data along the coast of China and the standard Earth model loading Green functions, the influence of the oceanic loading on the tidal gravity measurement at 25 fundamental stations are
studied by using a direct convolution technique. The loading amplitudes and phases for 8 main waves are calculated, the temporal variation of the tidal loading
at 10 main stations as of Beijing and Shanghai, is constructed in the present study.
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