苗爱梅. 2004. 地形对太原市污染物稀释扩散影响的模拟试验[J]. 气象学报, 62(1):112-118, doi:10.11676/qxxb2004.013
地形对太原市污染物稀释扩散影响的模拟试验
NUMERICAL SIMULATION EXPERIMENTS OF OROGRAPHIC INFLUENCE ON DI LUTION AND DIFFUSION OF MAIN POLLUTANTS IN TAIYUAN CITY
投稿时间:2003-01-03  修订日期:2003-03-05
DOI:10.11676/qxxb2004.013
中文关键词:  模式地形  模拟试验  污染物  稀释扩散
英文关键词:Model topography  Simulation experiments  Pollutants  Dilution and diffusion
基金项目:
作者单位
苗爱梅 山西省气象台, 太原, 030006 
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中文摘要:
      文中利用CAPPS模式进行了模拟试验,试图研究在不同环流背景下,太原附近簸箕型地形对该地主要污染物(SO2,NOx,PM10)稀释扩散的影响。结果表明:采用仿真模式地形,局地环流背景下,簸箕型地形阻碍了主要污染物的稀释和扩散,加剧近地层空气的污染;大尺度环流背景下,且地面为偏南风或偏东风时,簸箕型地形有助于主要污染物的稀释和扩散,SO2,NOx,PM10浓度减小,地面为偏北风或偏西风且风速≥5m/s时,SO2,NOx浓度减小,PM10浓度剧增。此外,还探讨了簸箕型地形对太原市主要污染物稀释扩散作用的机制,采用仿真模式地形,大尺度环流背景时,簸箕型地形对垂直运动具有增幅作用,且地形越高,增幅越明显。
英文摘要:
      In this paper the author uses CAPPS model system to make simulation experiments.It aims at studying the influence of dustpan-shaped ferrain on dilution and diffusion of main pollutants such as SO2,NOx and PM10 in Taiyuan City under the control of different circulations.The results showed thatin the emulated orographic scheme,controled by local scale circulation,the dustpan-shaped terrain inhibited dilution and diffusion of main polutants and aggravated the air pollution in ground layer;while controlled by large scale circulation and was a southerly or easterly wind in ground layer,the dust pan-shaped terrain dilution and diffusion of main pollutants and the density of main pollutants decreased,but when there was a northerly or westerly wind in ground layer and wind speed ≥5 m/s,the density of SO2 and NOx decreased and the density of PM10 increased sharply.As a result,in the emulated orographic scheme,influenced by large scale circulation,the dust pan-shaped terrain promotes vertical motion.The higher the terrain,the more obvious the increase.
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