摘要
Abstract
Based on the hourly data of NO2,SO2,CO,PM2.5,PM10 and meteorological parameters from December 5 to 9,2022 in Changzhou City,the causes of the pollution process dominated by NO2 and PM2.5 were analyzed by means of correlation coefficient,site cluster analysis and backward trajectory.The results show that the pollution process is mainly on the scale of urban pollution,and there is no obvious influence of external pollution air mass and regional transportation.The pollution process is controlled by high pressure uniform pressure field.Under the unfavorable meteorological conditions of high humidity,low wind force,low mixed layer height and no obvious precipitation,the pollution process occurs due to the gradual accumulation of pollutants.It is suggested to strengthen the management of motor vehicle exhaust,industrial sources and other pollution sources around the air station.关键词
常州市/污染累积/城市尺度/聚类分析/后向轨迹Key words
Changzhou City/pollution accumulation/city scale/cluster analysis/backward trajectory分类
资源环境
