摘要
本研究基于最优控制理论 ,采用变分数据同化法 ,通过建立伴随模型 ,把观测资料同化到陆架海域潮汐数值模型中去 ,优化开边界条件 ,以便提高数值预报的精度 .潮汐模型的控制方程为考虑平流项、非线性底摩擦和侧向涡动粘性项的非线性浅水方程组 .在第Ⅰ部分建立伴随模型和进行“孪生”数值试验的基础上 ,给出利用验潮站的水位资料以及TOPEX/Poseidon卫星测高数据在黄海、东海进行变分数据同化试验的数值结果 .
In order to improve the prediction of numerical tidal model in continental shelf, the open boundary conditions are optimized by assimilating the observed data into the model in which the adjoint method, based on optimal control theory, is used. The non linear shallow water equations are considered in which the horizontal kinematic nonlinearities, nonlinear bottom friction and horizontal eddy diffusion are included. On the basis of the establishment of adjoint model and twin experiment (Part Ⅰ), the variational assimilation results obtained by incorporating the data from tide stations with/without TOPEX/Poseidon altimeter data in the Huanghai Sea and the East China Sea for optimizing the open boundary conditions of the model are reported. The deviations of the model results before and after assimilation from the observed demonstrate the applicability of the variational assimilation.
出处
《海洋学报》
CAS
CSCD
北大核心
2001年第2期25-31,共7页
基金
国家自然科学基金资助项目!(4 9876 0 0 1)
国家基础研究"九五"攀登项目"现代地壳运动和地球动力学研究"
国家海洋局青年海洋科
关键词
潮汐数值模型
黄海
东海
验潮站
变分数据同化法
伴随法
variational assimilation
numerical tidal model
Huanghai Sea
East China Sea
tidal gauges
TOPEX/Poseidon
