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.
出处
《气象学报》
CSCD
北大核心
1993年第2期139-147,共9页
Acta Meteorologica Sinica
关键词
地形影响
中尺度
多源模式
大气
Orographic influence, A three-dimensional mesoscale model, Multiple sources model.
