伴随同化方法在模拟海洋潮汐中的应用

把从T0PEX/Poseidon卫星高度计资料中提取的沿轨道分潮的调和常数同化到二维非线性潮汐数值模式中,对台湾岛毗邻海域进行数值同化模拟.所用的同化方法为伴随同化方法,该方法的主要作用是校正开边界条件和底摩擦系数.结果表明:利用该方法对研究海域四个分潮调和常数的计算精度较高、速度快,克服了常规人工给定开边界和底摩擦系数计算潮汐所遇到的困难和不足.

The Applications of Adjoint Method in Simulating Tides

Assimilated the data,which from T0PEX/Poseidon altimeter and tide gauges data,into a nonlinear 2-D tides model of the adjacent sea area of Taiwan Island by using adjoint method.This method′s main function is to correct the bottom friction coefficients and open boundary conditions.This paper successfully realizes the simulation calculation of the harmonic constant of the four main tides(M2,S2,K1,O1).The results indicate that the calculation precision of the harmonic constant is high and the calculation speed is quick.It also gets over the difficulty and deficiency which encountered when conventionally calculating tides under the situation of giving the open boundary condition and the bottom friction coefficients.