Analysis of potential sources of PM2.5 in Linfen based on multi-site hybrid receptor model
WANG Yan1, GAO Xing-ai1, PEI Kun-ning1, SUN Hong-ping2, YAN Shi-ming1, GUO Wei1, WANG Xiao-lan1, JIANG Yun-sheng1
1. Shanxi Province Institute of Meteorological Sciences, Taiyuan 030002, China; 2. Shanxi Weather Modification and Lightning Protection Technical Center, Taiyuan 030002, China
Abstract：This paper used the PM2.5 concentration data of multiple sites in the heavily polluted city Linfen from 2018 to 2019 to study the PM2.5 concentration characteristics, spatial autocorrelation and agglomeration patterns in different seasons, and finally analyzed the potential source area of PM2.5 by introducing multi-site receptor model. The study found that the PM2.5 pollution in Linfen mainly concentrated at 8 sites in the Linfen Basin, including Yaodu, Xiangfen, Hongtong, Huozhou, Houma, Guxian,Quwo and Yicheng. The annual average concentration of PM2.5 exceeded 50μg/m3, and the average concentration in winter exceeded 100μg/m3. The spatial distribution characteristic of PM2.5 closely related to the topography, and the eight sites in the Linfen Basin had a high degree of spatial autocorrelation. The high PM2.5 concentration areas(high-high clustering) were mainly concentrated in the basin. Pollution in neighboring counties was an important reason for the high PM2.5 concentration in the main urban area of Linfen. Combined with the multi-site mixed receptor model(MS-PSCF and MS-CWT), we analyzed the potential source areas of Linfen and found that the potential sources of Linfen in spring were mainly concentrated in the northeast,southwest and southeast, most of which were medium and long distance transmission; In summer, the potential sources were significantly lower than the other three seasons, mainly in the east; The potential sources in autumn were mainly concentrated in some areas in the southwest; The potential sources in winter were mainly concentrated in the southeast and southwest and the close area in the north of Linfen. Except for summer, the common potential source area for the other three seasons was central and southern Shaanxi(located in the southwest), and the PSCF values all exceed 0.7, indicating that the probability of pollution in Linfen exceeded 70% during the southwest wind.
王雁, 高兴艾, 裴坤宁, 孙鸿娉, 闫世明, 郭伟, 王小兰, 蒋云盛. 基于多站混合受体模型的临汾市PM2.5潜在源分析[J]. 中国环境科学, 2022, 42(3): 1032-1039.
WANG Yan, GAO Xing-ai, PEI Kun-ning, SUN Hong-ping, YAN Shi-ming, GUO Wei, WANG Xiao-lan, JIANG Yun-sheng. Analysis of potential sources of PM2.5 in Linfen based on multi-site hybrid receptor model. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(3): 1032-1039.
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