| 行星边界层内扩散特征的一个数值研究 |
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| 引用本文： | 雷孝恩,邓玉珍.行星边界层内扩散特征的一个数值研究[J].气象学报,1987,45(3):313-321. |
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| 作者姓名： | 雷孝恩 邓玉珍 |
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| 作者单位： | 中国科学院大气物理研究所
(雷孝恩)，中国科学院大气物理研究所(邓玉珍) |
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| 摘 要： | 使用近年来PBL内实测平均风,湍流统计量和拉氏时间尺度随高度变化的结果,对用最简单的二阶闭合假设导出的三维定常物质连续方程作数值解,分析讨论了风速、风向和湍流统计特征量的垂直切变以及粗糙长度z_0对PBL内浓度分布的影响。本文的结果对PBL内湍流扩散本质的认识及污染模式的建立均有益处。
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| 收稿时间： | 1983/8/10 0:00:00 |
| 修稿时间： | 2/5/1986 12:00:00 AM |
AN INVESTIGATION ON DIFFUSION CHARACTERISTICS IN THE PBL BY A NUMERICAL METHOD |
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| Lei Xiaoen and Deng Yuzhen.AN INVESTIGATION ON DIFFUSION CHARACTERISTICS IN THE PBL BY A NUMERICAL METHOD[J].Acta Meteorologica Sinica,1987,45(3):313-321. |
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| Authors: | Lei Xiaoen and Deng Yuzhen |
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| Institution: | Institute of Atmospheric Physics, Academia Sinica;Institute of Atmospheric Physics, Academia Sinica |
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| Abstract: | Using the newly observed results of variation of mean wind, the turbulent statistics and Lagrangian time scales with height in the PBL, the stationarity three-dimensional equation of mass continuity which is gained by the secondorder closure assumption is solved by a numerical method. The influences of vertical shear of wind speed and the turbulent statistics, and of the roughness length on pollution concentrations in the PBL are analysed. The results are useful both in understanding the turbulent diffusion essence in the PBL and in establishing pollution models. |
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