| 渤、黄、东海底摩擦系数的研究 |
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| 引用本文： | 孙丽艳,吕咸青.渤、黄、东海底摩擦系数的研究[J].海洋湖沼通报,2007(2):7-12. |
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| 作者姓名： | 孙丽艳 吕咸青 |
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| 作者单位： | 中国海洋大学物理海洋实验室,山东,青岛,266003 |
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| 基金项目： | 物理海洋教育部重点实验室开放课题基金(No．200307)，国家重点基础研究发展计划项目(No．2005CB422308)，高等学校博士学科点专项科研基金(No．20050423007)资助 |
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| 摘 要： | 本文将伴随法用于渤、黄、东海M2分潮的数值模拟,利用Topex／Poseidon高度计资料进行同化,优化海底摩擦系数。文中对底摩擦系数取常数时进行了优化,同时还对底摩擦系数的一种新的处理方法进行了研究,即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播值得到,优化后得到空间分布的底摩擦系数。针对两种不同的线性底摩擦假设分别进行了一系列的实际实验,结果表明由空间分布的底摩擦系数得到的模拟值比底摩擦系数取常数得到的模拟值更接近观测值,能有效地提高数值模拟的精度。
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| 关 键 词： | 数值模拟 伴随法 底摩擦系数 |
| 文章编号： | 1003-6482（2007）02-0007-06 |
| 修稿时间： | 2006-03-14 |
STUDY ON BOTTOM FRICTION COEFFICIENT IN THE BOHAI,HUANGHAI AND EAST CHINA SEAS |
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| SUN Liyan,LV xianqing.STUDY ON BOTTOM FRICTION COEFFICIENT IN THE BOHAI,HUANGHAI AND EAST CHINA SEAS[J].Transaction of Oceanology and Limnology,2007(2):7-12. |
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| Authors: | SUN Liyan LV xianqing |
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| Institution: | Laboratory of Physical Oceanography,Ocean University of China, Qingdao 266003, China |
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| Abstract: | In this study, the adjoint method was used to optimize the bottom friction coeffi-cients(BFC) in the Bohai, Huanghai and East China Sea. The BFC was optimized when it was constant, and a new method was proposed: the BFC of each grid point in the computing area could be expressed in terms of some reduced parameter set through linear interpolation and the reduced parametet set was called the independent BFC. A series of experiments were conducted for two different linear BFC assumptions. The experimental results demonstrated that compared with the constant BFC, the BFC with spatial distribution could produce higher simulation accuracies. |
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| Keywords: | numerical simulation adjoint method bottom friction coefficients |
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