潮汐模型对利用卫星测高数据研究海平面变化的影响  

Influence of Tide Model on Mean Sea Level Variation Using Altimetry Data

作　　者：许军[1] 暴景阳[1] 刘雁春[1] 

机构地区：[1]大连舰艇学院海洋与测绘科学系,大连市解放路667号116018

出　　处：《武汉大学学报（信息科学版）》2006年第6期503-507,共5页Geomatics and Information Science of Wuhan University

基　　金：地球空间环境与大地测量教育部重点实验室开放研究基金资助项目(03-04-061469990324233-04-03);国家测绘局测绘科技发展基金资助项目(2001-01-02(214151926))

摘　　要：利用T/P测高数据反演了中国近海及西北太平洋海域的潮汐参数,构造了CSR3.0、FES95.2和T/P反演的海潮模型改正下的海面高时间序列,通过海面高变化曲线及功率谱的比较确定了利用测高数据发现的海平面季节内变化主要是潮汐模型误差的贡献。Variations of sea surface height in the Yellow Sea, East China Sea, South China Sea and Northwest Pacific have been obtained from TOPEX/Poseidon altimetry data corrected by CSR3.0, FES95.2 and the tide model established by authors respectively. It is shown by spectral analyses that sea level variations corrected by CSR3.0 and FES95.2 contain major components which are dominated by the annual and alias periods of principal tides constituent under T/P sampling. Nevertheless, sea level variations corrected by the tide model established by authors represent characteristic of non-tidal effects which means that tidal and nontidal variations have been segregated correctly. And Fourier analysis shows that power spectral density is in proportion to deviation of CSR3.0 and FES95. 2 compared with the tide model established by authors, which verifies the tidal aliasing is the mechanism of major components. In shallow area where the precision of the global tide models is lower, such as the seas adjacent to China, error of the tide models is higher than the real rule of variations of sea surface height in magnitude. Thus particular attention should be paid to the precision of the tide model in calculating variations of sea surface height.

关 键 词：卫星测高 海平面变化 潮汐模型 潮汐混叠 

分 类 号：P228.42[天文地球—大地测量学与测量工程] P229.2[天文地球—测绘科学与技术]