兰州市冬季空气污染的天气成因分析及浓度预报

兰州是全国冬季大气污染最严重的城市之一 ,通过对污染与天气形势的分析 ,给出了影响冬季兰州污染的天气分型 ;对 3种主要空气污染物TSP、SO2 、NOX 浓度值与同期表征逆温特征的逆温参数及地面气象要素作了统计分析 ,结果表明 :(1)污染物浓度与逆温层厚度呈显著正相关 ;(2 )污染物浓度与平均温度、能见度、风速、总云量、相对湿度成负相关 ,与温差、气压成正相关。最后针对不同天气分型 ,给出了冬半年兰州污染物浓度预报方程 ,经检验预报效果良好

A Study on Synoptic Cause of Air Pollution and Forecast Methods of Air Pollutant Concentrations in Lanzhou Proper in Winter

Lanzhou is one of the cities in which air pollution is very heavy. Based on the analysis on the relation between air pollution and climate element, the weather style in winter were given .The correlations between concentrations of three mainly air pollutants (TSP?SO2?NOX) and inversion parameter at the same times were analysised, the correlations between concentrations of air pollutants and surface meteorological elements were analysised too. The results show:(1) The correlation coefficients between air pollutant concentrations and thickness of inversion is positive.(2) The correlation coefficients between air pollutant concentrations and average of air temperature, relative humidity, horizontal visibility ,wind speed ,total cloud amount is negative. The correlation coefficients between air pollutant concentrations and difference between maximal air temperature and minimum air temperature is positive. As the result, air pollution concentration forecast equations were given for different weather style in winter. The examined results show that the forecast project has high accuracy.