郑州市空气质量状况及冬季持续污染过程的气象机理分析

利用2004-2008年郑州市环境监测站所监测的SO2、NO2、PM10日平均浓度资料及历史气象资料,分析了郑州市近5a的空气质量状况与特征,并以2006年12月份的2次持续性污染过程为例,分析了气象条件对污染物浓度的影响,结果显示：郑州市以煤烟型污染为主,污染物浓度具有明显的季节变化特征,冬春季节污染物浓度明显高于夏秋季节;冬季均压场中持续多日风速小、近地面层出现逆温层是造成郑州市出现持续污染事件的主要气象条件,持续性污染过程往往因受冷空气的影响而结束。

Air Quality Status of Zhengzhou and Analysis of the Meteorological Mechanism of Durative Pollution Process in Winter

This article analyzes the air quality status and characters of Zhengzhou from 2004 to 2008, by studying the historical meteorological data and the daily mean concentration data of SO2 , NO2 , PM10 obtained by the environmental observation stations of Zhengzhou. The article researches two durative pol- lution events happened on December 2006, thus to analysis how meteorological conditions effect on the concentrations of air pollutants. The result indicates that the main pollution type of Zhengzhou is smoke type pollution, the pollutant concentrations vary with the seasons apparently, the concentrations in winter and spring are remarkably bigger than in summer and autumn; in winter, the continuous low speed wind and the inversions in boundary layer are the primary meteorological conditions those cause the durative pollution events, and durative pollution events are always damaged by cold front weather.