一个考虑地形影响的三维中尺度Monte-Carlo多源模式  

A THREE-DIMENSIONAL MESOSCALE MONTE-CARLO MULTIPLE-SOURCES MODEL INVOLVING OROGRAPHIC INFLUENCE

作　　者：邓玉珍[1] 雷孝恩[1] 田瑞明 

机构地区：[1]中国科学院大气物理研究所,北京100029

出　　处：《气象学报》1993年第2期139-147,共9页Acta Meteorologica Sinica

摘　　要：本文设计了一个考虑地形、湍流统计量垂直非均匀和非平稳过程影响的三维中尺度Monte-Carlo多源模式。模式模拟了珠海地区大气SO_2浓度时空分布,很好地揭示了由海陆风和山谷风控制下浓度的日变化规律,计算与实测浓度之间平均比值为0.94±0.2388,其结果是令人满意的。本模式具有概念清楚,没有作人为的特别假设和数值解平流扩散方程时出现的伪扩散问题,更能反映湍流扩散本身具有随机性这一本质的优点。A three-dimensional mesoscale Monte-Carlo model in which orographic influence, vertical asymmetry of turbulent statistic and non-equilibrium effect are considered has been used to study the spatial and temporal distribution of atmospheric SO2 concentration in ZHUHAI region. The results show the daily concentration variation under mountain-valley-breeze and land-sea-breeze controlling The average rate of computational and observational concentration is 0.94 + 0.2388, that is satisfied. The model has advantage of clear concept, no special artificial assumption and no pseudo-diffusion, and can better reveal the random characteristic which turbulent diffusion involve itself.

关 键 词：地形影响 中尺度 多源模式 大气 

分 类 号：P433.2[天文地球—大气科学及气象学]