Investigation of Particulate Matter Regional Transport in Beijing Based on Numerical Simulation
刊物全称
Aerosol and Air Quality Research
论文作者
Jianjun He,Hongjun Mao,Sunling Gong,Ye Yu,Lin Wu,Hongli Liu,Ying Chen,Boyu Jing,Peipei Ren,Chao Zou
发表年度
2017
刊物类别
SCI
卷
17
期
5
页码
1181-1189
影响因子
2.606
通讯作者
He, JJ
请求全文
关键词
Regional transport, particulate matter, Backward trajectory, CUACE, FLEXPART
摘要
The frequent occurrence of regional air pollution makes it challenging to control. Based on source sensitivity research performed with the Chinese Unified Atmospheric Chemistry Environment (CUACE) model and dispersion simulation performed with the Flexible Particle dispersion model (FLEXPART), the regional transport of particulate matter (PM), potential source regions, and transport pathways were investigated for Beijing in summer (July) and winter (December) 2013. The mean near-surface trans-boundary contribution ratio (TBCR) of PM2.5 in Beijing was 53.4% and 36.1% in summer and winter 2013, respectively, and 51.8% and 35.1% for PM10. Regional transport in summer was more significant than that in winter. Seasonal difference of meteorological condition combined with the distribution of emission is responsible for seasonal difference of TBCR. The secondary aerosol is mostly contributed by regional transport. The transport of PM is mostly from Hebei province and Tianjin municipality. Based on backward trajectories analysis, the air mass source occurred from different directions in summer, while occurred from northwest in winter. The pollution level and the TBCR were closely related to the transport pathways and distance, especially in summer.
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