| 采用逐时递推同化技术修正伶仃洋外海边界水位 |
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| 引用本文： | 包芸,唐元春. 采用逐时递推同化技术修正伶仃洋外海边界水位[J]. 水动力学研究与进展(A辑), 2005, 20(1): 95-100 |
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| 作者姓名： | 包芸 唐元春 |
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| 作者单位： | 中山大学近岸海洋研究中心,广州,510275;中山大学近岸海洋研究中心,广州,510275 |
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| 基金项目： | 国家973项目资助(2002CB4124007) |
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| 摘 要： | 采用变分同化技术修正伶仃洋二维潮流场的外海水位边界条件。由于计算分辨率较高，使计算量大而无法储存所有时刻、所有空间的物理量，以至通常的变得同化技术变得不可行。本文根据修正外海边界条件的计算特点，提出了逐时递推同化的思路。只储存六小时的计算物理量，每次仅同化修正一个小时的水位边界，而后逐小时向前递推。以伶仃洋二维潮流场为算例，应用逐时递推同化技术修正外海水位边界条件，得到了令人满意的结果。
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| 关 键 词： | 数值模拟 变分同化 边界条件 潮流场 |
| 文章编号： | 1000-4874(2005)01-0095-06 |
Optimizing boundary conditions with water level by the method of the recursion by hour assimilation |
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| BAO Yun,TANG Yuan-chun. Optimizing boundary conditions with water level by the method of the recursion by hour assimilation[J]. Chinese Journal of Hydrodynamics, 2005, 20(1): 95-100 |
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| Authors: | BAO Yun TANG Yuan-chun |
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| Abstract: | The boundary conditions with water level in 2-D tidal simulation are optimized by data assimilation. The usual method of data assimilation can not be used because the data is too big in the 2-D tidal simulation of the LingDing Estuary with high resolution. In the present paper, an idea of the recursion by hour assimilation is given based on the characteristics of the optimized boundary conditions. Satisfactory results are gained for optimizing boundary conditions with water level by using the present method in the 2-D tidal simulation of the LingDing Estuary. |
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| Keywords: | numerical simulation data assimilation boundary condition tidal field |
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