Based on SO2, NOy, O3, CO and PM2.5 monitoring data of Beijing in 2012, the variation characteristics of PM2.5 and reactive gas and the correlation with the meteorological conditions were discussed. The average mass concentration of PM2.5 was 52.0μg/m3 in Beijing, 2012. The results showed that PM2.5 had a large range over year with a slow accumulation and fast clearance variation especially in autumn and winter. NOy, NO, CO and SO2 showed the same trend with PM2.5 changing, but O3 changed in the opposite trend. The highest frequency of PM2.5 appeared between 0~25μg/m3 for 27%. NOy, NO, CO, SO2 and PM2.5 showed a rapid decrease at wind speed < 3m/s, among them, the reduction rate of PM2.5 was ~ 25 %/(m/s). When the wind speed was > 3m/s, the pollutants reduced to a lower concentration and tended to be gentle. It was not showed significant influence of PM2.5 mass concentration with the increasing of relative humidity on cleaning day, but showed rapidly increase of PM2.5 on pollution days.
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JIANG Qi, WANG Fei, ZHANG Heng-de, LÜ Meng-yao. Analysis of temporal variation characteristics and meteorological conditions of reactive gas and PM2.5 in Beijing. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(3): 829-837.
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