摘要
首先将大约10a的TOPEX/Poseidon(T/P)高度计资料沿星下轨迹点做潮汐调和分析,提取得到各分潮的调和常数,利用伴随同化方法,同化到二维非线性潮汐数值模式中,模拟了黄海、渤海区域M2,S2,O1,K1等4个潮汐分潮,并根据计算结果给出了各分潮的同潮图.将计算值与观测值的进行偏差统计,结果表明计算值与验潮站资料符合良好.研究过程中做了两类试验:一类试验是针对不同的参数进行优化,一类试验是针对不同的资料进行同化.第一类试验表明:将开边界条件和底摩擦系数同时作为模型优化的控制参数,其结果明显优于单独优化开边界条件;第二类试验表明:同时同化高度计资料与验潮站资料,比单独同化其中任一种资料,对模式计算结果都有较好的改进.研究结果表明,采用伴随同化方法,利用T/P高度计资料和验潮站资料作为同化数据能有效改进模拟结果,用来反演黄海、渤海的潮波系统是可行的.
Tidal constituents , which are extracted from about 10-year TOPEX/Poseidon altimetry data along track points, are assimilated into an two-dimension non-linear tidal model with the adjoint assimilation method. Tidal constituents M_2,S_2,O_(1 )and K_(1 )are simulated in the Huanghai and Bohai Seas, then Co-tidal maps are obtained. The bias between calculations and observations are also provided and the results tell that calculations agree well with observations. Moreover, there are two experiments in this paper: one is to optimize different coefficient, the other is to assimilate different data. The first experiment shows that it is better to optimize the open boundary conditions and the bottom friction coefficients at the same time than to optimize the open boundary conditions only. The second experiment shows that the results are better when assimilating the altimetry data and the tidal constants from tidal gauges simultaneously than assimilating any one separately. The results also show that it is useful to simulate the tidal system in the Huanghai and Bohai Seas by assimilating T/P altimetry data and tidal constants from tidal gauges with adjoint assimilation method.
出处
《海洋学报》
CAS
CSCD
北大核心
2005年第4期10-18,共9页
基金
物理海洋教育部重点实验室开放课题基金项目(200307)
中国科学院海洋研究所领域前沿项目"卫星高度计在海洋动力过程中的应用研究"(KZCX2202).
