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

中文关键词:  地形影响  三维中尺度  多源模式

英文关键词:Orographic influence  A three-dimensional mesoscalc model  Multiple-sourccs model

中文摘要:

      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SO₂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.

英文摘要:

      A three-dimensional mesoscale Monte-Carlo model in which orographic influence,vertical asymllletry 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.