复杂地形对城市空气污染影响的数值试验研究

以辽宁为例,通过改变其中部地区的地形高度,利用新一代空气质量模式系统Model-3对2006年11月24日的一次污染过程中气象场和污染物浓度场的分布进行了敏感性试验.结果表明,地形的存在会导致风的辐合,风速降低,逆温增强,这些都构成了不利于污染物输送及扩散的因素,容易造成污染物的堆积和滞留,从而使污染物浓度较高

Simulation on Influence of Complex Terrain on Urban Air Pollution

In order to study the influence of complex terrain on urban air pollution,a sensitive test is made by using the new generation air quality models system Models-3 by means of modifying the terrain height of central Liaoning Province to research the meteorology and concentration filed in the course of pollution on 24 November 2006.The results show that the complex terrain will make the wind convergent,the wind speed diminish and the inversion temperature strengthen,all of which form the negative factors for polluants to be transported and dispers,causing the pollutant piles and resorts,therefore brings high concentration of the pollutant.