阳泉市2019~2020年重污染天气特征及气象条件分析

Analysis of Heavy Pollution Weather Characteristics and Meteorological Conditions in Yangquan City from 2019 to 2020

利用阳泉市6个国控环境空气质量监测站和1个国家一般气象站数据,采用常规统计方法、滑动平均、线性趋势分析、ArcGIS克里金插值法(Kriging)等方法展开研究,分析阳泉市2019~2020年重污染天气特征及其与气象条件的关系。结果表明:阳泉市重污染天气主要污染物是PM_(2.5)和臭氧,且呈明显的季节性变化特征,秋冬季以PM_(2.5)为主,而夏季以臭氧污染为主;当满足相对湿度较高、风速较小、吹偏东风时,秋冬季节容易发生PM_(2.5)污染,当夏季午后气温较高时,容易发生臭氧污染;结合本地实际情况,为阳泉市科学防治重污染天气提供气象参考。

Based on the data of 6 state-controlled ambient air quality monitoring stations and 1 national general meteorological station in Yangquan City,conventional statistical methods,sliding average,linear trend analysis,ArcGIS Kriging interpolation and other methods were used to study the characteristics of heavily polluted weather in Yangquan City from 2019 to 2020 and its relationship with meteorological conditions.The results showed that PMX5 and ozone were the main pollutants in the heavily polluted weather in Yangquan city,and presented obvious seasonal variation characteristics.PM_(2.5)was the main pollutant in autumn and winter,while ozone was the main pollutant in summer.PM_(2.5)is easy to occur in autumn and winter when the relative humidity is high,the wind speed is low and the wind direction is easterly.Ozone pollution is easy to occur when the temperature is high in the afternoon in summer.Combined with the local actual situation,it provides meteorological reference for the scientific prevention and control of heavily polluted weather in Yangquan City.