| 摘要: |
| 把利用正交潮响应方法对248个周期超过6年的南中国海的TOPEX/Poseidon卫星高度计资料进行潮波分析提取的沿轨分潮调和常数同化到二维非线性潮汐数值模式中去,优化模型中的开边界条件和底摩擦系数,模拟了南海m1和M2分潮的潮汐。所用的同化方法是伴随同化。根据计算结果给出了m1和M2分潮的同潮图。计算结果与59个验潮站资料的比较结果是: m1分潮的振幅和迟角的平均绝对误差分别是4.8cm和8.7°; M2分潮的振幅和迟角的平均绝对误差分别是4.3cm和11.0°,表明计算结果与验潮站资料符合良好。研究结果表明,利用伴随同化方法把TOPEX/Poseidon资料同化到潮汐数值模式中去对模式进行校正是有效的。
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| 关键词: 伴随同化,开边界,底摩擦系数,潮汐模型 |
| DOI：10.11693/hyhz200301013013 |
| 分类号: |
| 基金项目:国家重点基础研究发展规划项目,G1999043808)号和国家863计划资助项目,AA633030号及国家自然科学基金项目,40076004号 |
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| A NUMERICAL MODEL OF TIDES IN THE SOUTH CHINA SEA BY ADJOINT METHOD |
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WU Zi-Ku1, TIAN Ji-Wei1, Lǚ Xian-Qing1, WONG Lai-Ah2
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1.Key Laboratory of Physical Oceanography, College of Marine Environmental, China Ocean University;2.Center for Coastal and Atmosphere Research, HongKong University of Science and Technology
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| Abstract: |
| Assimilated the data, which from TOPEX/Poseidon satellite altimeter data (248 periods lasting six years) in the South China basing upon orthogonal response method, into tides model by using adjoint method. Optimal open boundary conditions and bottom friction coefficient were given, the cotidal charts for m1 and M2 as well. Compared with the result from the data of 59 tide gauge stations, the average absolute error for m1 constituent between the computed and the observed harmonic constants are 4.8cm and 8.7°for amplitudes and phase-lags respectively, there are 4.3cm and 11°for M2 constituent. The results in the numerical simulation coincide with tide gauges. It shows that the method is valid.
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| Key words: Adjoint assimilation, Open boundary conditions, Bottom friction coefficient, Tidal model |
