| 几种垂直跳点网格计算频散性的比较研究 |
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| 引用本文： | 刘宇迪,季仲贞,桂祈军,朱红伟.几种垂直跳点网格计算频散性的比较研究[J].大气科学,2001,25(4):523-535. |
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| 作者姓名： | 刘宇迪 季仲贞 桂祈军 朱红伟 |
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| 作者单位： | 1.解放军理工大学气象学院,南京 211101中;国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京 100029 |
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| 基金项目： | 国家重点基础研究发展规划项目G1999032801、国家杰出青年科学基金项目49825109和国家自然科学基金资助项目49975020共同资助 |
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| 摘 要： | 为证明两种新的垂直跳点网格--LZ网格和LY网格的有效性,从频率、群速和出现错误群速的垂直尺度范围等方面与现有的几种垂直跳点网格和时间--垂直跳点网格进行了比较.结果表明:LZ网格计算频散性与目前使用的最广泛的并且计算频散性也是最佳的CP网格相当,而LY网格次之,从而为模式设计者选取垂直网格提供了又一种选择.
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| 关 键 词： | 数值天气预报 垂直网格 频散特征 群速度 |
Computational Dispersion Properties of Some Vertically Staggered Grids |
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| Liu Yudi,Ji Zhongzhen,Gui Qijun and Zhu Hongwei.Computational Dispersion Properties of Some Vertically Staggered Grids[J].Chinese Journal of Atmospheric Sciences,2001,25(4):523-535. |
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| Authors: | Liu Yudi Ji Zhongzhen Gui Qijun and Zhu Hongwei |
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| Abstract: | Two new vertically staggered grids, LZ grid and LY grid, are introduced. To account for their validities, the computational dispersion properties of LZ grid and LY grid are compared with all the other vertically staggered grids in terms of frequency and group velocity characteristics and the vertical scale ranges with group velocities of the wrong sign. Its result shows that the dispersion properties of the LZ grid are the same as those of the CP grid which is widely used and is the most optimal vertically staggered grid, and LY grid is the second one. Thus, it may provide additional choice of the appropriately vertical grid for modelers. |
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| Keywords: | numerical weather prediction vertically grid dispersion property group velocity |
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