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渤海开边界潮汐的伴随法反演
吕咸青1,2, 方国洪1
1.中国科学院海洋研究所;2.物理海洋教育部重点实验室
摘要:
潮汐潮流数值模拟中的一个主要难点在于开边界条件的确定。本文采用伴随法,由渤海沿岸19个验潮站的潮汐调和常数来反演渤海海域的开边界条件,以实现渤海潮波的数值模拟。计算所得调和常数与实测值之差的绝对平均值: m1潮波振幅差为1.4cm,迟角差为5.0°；M2潮波振幅差为2.4cm,迟角差为5.0°。数值模拟结果正确地反映了渤海m1和M2潮波的基本特征。
关键词:  渤海,潮汐,开边界条件,伴随方法
DOI：
分类号:
基金项目:国家重点基础研究发展规划项目,G1999043808号;国家自然科学基金资助项目,40076004号;国家863计划资助项目,818-06-05-02号;中国科学院重点项目,KZ952-J1-405号
INVERSION OF THE TIDES ON THE OPEN BOUNDARY OF THE BOHAI SEA BY ADJOINT METHOD
Lv Xian-Qing1,2, FANG Guo-Hong1
1.Institute of Oceanology, The Chinese Academy of Sciences;2.Key Laboratory of Physical Oceanography, Ministry of Education
Abstract:
A major difficulty faced by numerical models of tidal flows is the treatment of open boundaries. To simulate m1 and M2 tides in the Bohai Sea, adjoint method was used to deduce the open boundary conditions of the Bohai Sea by using the harmonic constants at 19 tide gauge stations in the interior of the region. The average absolute differences between the simulated and the observed were computed. For m1 tide, the average absolute difference of the amplitude is 1.4cm, and the average absolute difference of the phase-lag is 5.0°. For M2 tide, the average absolute difference of the amplitude is 2.4cm, and the averaged absolute difference of the phase-lag is 5.0°. The results in the numerical simulation coincide with m1 and M2 tides observed in the Bohai Sea.
Key words:  Bohai Sea, Tides, Open boundary conditions, Adjoint method
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