金昌市不同季节大气颗粒物的传输路径和潜在源分析

选取金昌市2019年3月-2020年2月PM2.5和PM10逐小时观测数据,分析该市颗粒物污染水平的季节差异,并利用HYSPLIT后向轨迹模式和GDAS气象数据,分析不同气流轨迹对金昌市颗粒物浓度的影响及不同季节颗粒物的潜在污染来源.结果表明,2019年金昌市冬季PM2.5污染最严重,春季PM10污染严重;春、秋季PM...

Transport Pathways and Potential Sources of Atmospheric Particulates in Different Seasons in Jinchang

PM2.5 and PM10 hourly observation data in Jinchang from March 2019 to February 2020 were selected to analyze the seasonal difference of PM pollution level, the impact of different airflow trajectories on PM concentration and the potential pollution sources of PM in different seasons by using HYSPLIT backward trajectory model and GDAS meteorological data. The results showed that during 2019 in Jinchang, PM2.5 pollution was the most serious in winder and PM10 pollution was serious in spring. In spring and autumn, the airflow trajectories with the highest degree of PM10 pollution mainly came from the long-distance transportation in the northwest in spring and autumn, while PM2.5 pollution degree was high in summer, autumn and winter with the short-distance airflow trajectories. The contribution source areas of PM2.5 were mainly located in eastern Xinjiang and southern Russia in spring, southeastern Gansu and Alxa League in autumn, central and western Qinghai, northern Tibet, and western Xinjiang in summer and winter.