| 海岸边界层模式中闭合方案的模拟分析 |
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| 引用本文： | 何文英,徐玉貌.海岸边界层模式中闭合方案的模拟分析[J].气象科学,2000,20(2):150-160. |
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| 作者姓名： | 何文英 徐玉貌 |
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| 作者单位： | 南京大学大气科学系,南京210093 |
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| 摘 要： | 本文建立一个三维非静力边界层模式对杭州湾附近复杂地形域区进行了数值模拟。要用常用的能量闭合和一 新的非局地反梯度闭合方案结合实测资料，以验证不同闭合方案模拟实际大气的能力，进一步分析三维边界层模式的效能结果表明，两种闭合方案都能较好的模拟澳陆环流及温度场，而反梯度闭合比能量闭合更能细致、敏感的模拟湍流场随地形的变化，且模拟结果与实测接近。
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| 关 键 词： | 海岸边界层模式 三维非静力模式 湍流 能量闭合 |
| 修稿时间： | 1999年6月21日 |
COMPARISON STUDY OF CLOSURE SCHEMES IN NUMERICAL SIMULATION OF BOUNDARY LAYER IN COASTAL AREAS |
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| He Wenying,Xu Yumao.COMPARISON STUDY OF CLOSURE SCHEMES IN NUMERICAL SIMULATION OF BOUNDARY LAYER IN COASTAL AREAS[J].Scientia Meteorologica Sinica,2000,20(2):150-160. |
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| Authors: | He Wenying Xu Yumao |
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| Abstract: | In this paper,a 3-dimensional non-hydrostatic PBL model has been developed and used for numerical simulation in the complex terrain,near Hang Zhou gulf. In order to test the validity of the different closure scheme simulating atmosphere and analyse the ability of the 3-dimension model,a turbulent kinematic energy (TKE)closure and a new non-local counter gradient (CG)closure were applied to the model,combining with observed data. It is shown that by using the two closure metheds one can obtain good results for the simulation of wind and temperature fields in coastal areas. The result obtained by CG closure scheme can reflect the variation of turbulent fields with terrain more sensitively and finely than that by TKE closure. Moreover, the former is closer to the observation than later. |
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| Keywords: | Structure of boundary-layer in coast areas 3-D nonhydrostatic model Nonlocal counter gradient closure Tubulent kinematic Energy closure |
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