| 摘要: |
| 利用j, v模型调和分析1992～2002 年共10 a 的TOPEX/Poseidon(T/P)海面高度距平资料, 提取了南海K1, O1, P1, Q1, M2, S2, N2和K2等8 个主要分潮的潮汐调和常数。分析比较了卫星上下行轨道的19 个交叉点的振幅和迟角, 其中M2, S2, K1 和O1 的平均向量均方根偏差分别是1.5, 1.1, 2.5 和1.4 cm;将交叉点的调和常数与TPXO7.2 模式的结果进行了比较, 结果表明M2, S2, K1 和O1 分潮振幅的绝对平均误差均小于3 cm, 迟角的最大绝对平均误差为7.8°。选取了与卫星轨道较近的8 个验潮站, 对验潮站的实测数据调和常数和本文所得调和常数进行了比较, 结果显示K1分潮的向量均方根偏差为4.7 cm,M2分潮的向量均方根偏差为3.7 cm。论文结果表明利用j, v模型调和分析方法对南海海域卫星高度计资料进行潮汐信息提取是可靠的, 并可为局部重力场的研究提供海洋潮汐改正数据, 有一定的参考价值。 |
| 关键词: 潮汐 南海 TOPEX/Poseidon j, v 模型调和分析 |
| DOI： |
| 分类号: |
| 基金项目:国家高技术研究发展计划(863 计划) 重点课题(2008AA09A401-05) |
|
| The South China Sea tides analysis based on TOPEX/Poseidon altimetry |
|
|
| Abstract: |
| Harmonic analysis of 10 years (1992～2002) of TOPEX/Poseidon (T/P) along-track altimetry is performed to derive the semidiurnal (M2, S2, N2 and K2), diurnal (K1, O1, P1 and Q1) tides in the South China Sea. The T/P solutions are evaluated through intercomparison for 19 crossover points, comparison with the results of TPXO7.2 and the ground truth, showing that the vector root mean square errors at crossover points of M2, S2, K1 and O1 are 1.53, 1.15, 2.57 and 1.41cm, respectively and the absolute mean error with TPXO7.2 is less than 3 cm in amplitudes and 7° in phase lags for principal constituents (M2, S2, K1 and O1), and the RMS errors from comparing with the ground truth are less than 5 cm. All above show that the accuracy of j, v model harmonic analysis of T/P altimeter data in the South China Sea is reliable. |
| Key words: tides the South China Sea TOPEX/Poseidon j, v model |
