渤黄东海底摩擦系数的研究(Ⅱ)  

Bottom friction coefficient of the Bohai Sea,the Yellow Sea and the East China Sea(Ⅱ)

作　　者：孙丽艳[1] 吕咸青[2] 

机构地区：[1]国家海洋环境监测中心,辽宁大连116023 [2]中国海洋大学物理海洋实验室,山东青岛266003

出　　处：《海洋环境科学》2008年第A02期49-54,共6页Marine Environmental Science

基　　金：物理海洋教育部重点实验室开放课题基金资助(200307);国家重点基础研究发展计划项目(2005CB422308);高等学校博士学科点专项科研基金资助(20050423007)

摘　　要：底摩擦系数的一种新的处理方法:在计算海区选取一些点给定底摩擦系数,海区中任意一点的底摩擦系数由这些点的底摩擦系数线性插值得到。本文将伴随法用于渤黄东海M2分潮的数值模拟,根据Topex/Poseidon高度计资料对底摩擦系数取常数时进行了优化,同时还对这种新的处理方法的底摩擦系数进行了优化,得到空间分布的底摩擦系数。文中考虑了3种不同的非线性底摩擦假设,分别进行了一系列的实际实验,结果表明,与传统的处理底摩擦系数的方法相比,利用伴随法反演出的空间底摩擦系数能有效地提高数值模拟的精度。A new method to deal with the bottom friction coefficients （BFC） was studied： the BFC of each grid point in the computing area can be expressed in terms of some reduced parameter set through linear interpolation and the reduced parameter set is called inde- pendent BFC. Adjoint method was used to optimize the BFC of the Bohai Sea,the Yellow Sea and the East China Sea when the BFC was constant and when the BFC were independent. A series of experiments were done for three different non-linear BFC assumptions. The experimental results demonstrated that, comparing with the constant, the BFC with spacial distribution can obtain higher simulation accuracy.

关 键 词：数值模拟 伴随法 底摩擦系数 

分 类 号：P731.2[天文地球—海洋科学]