宜昌市城区灰霾天气成因分析研究

Research on the Cause of Haze in Urban Yichang

从灰霾天气形成的可能影响因素出发,根据长期的气象和环保观测资料,将近10年来宜昌市城区逆温层与等温层、降水日、风速风向、环境空气质量优良天数、可吸入性颗粒物(PM10)年均值、二氧化硫(SO2)年均值、二氧化氮(NO2)年均值的观测值与灰霾日观测值进行相关分析,并分析了宜昌市城区环境污染的气象化学作用,揭示出宜昌市城区灰霾天气成因主要是与不利扩散和降解的气象化学作用有关,与目前环境空气质量监测的PM10、SO2、NO2三个指标无明显相关关系,而与细粒子、气溶胶污染有关。

The relationships between thermal inversion layer、annual precipitation days 、wind speed and direction、annual days of API≤ 100、annual concentration of PM10,SO2,NO2 and annual haze days were analysed。 The result indicates that the meteorological conditions and the fine particles aerosol pollution over Yichang city is the possible cause of haze other than air pollution of PM10,SO2 and NO2.