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Evolution of surface O3 and PM2.5 concentrations and their relationships with meteorological conditions over the last decade in Beijing

Cited 40 time in scopus
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Title
Evolution of surface O3 and PM2.5 concentrations and their relationships with meteorological conditions over the last decade in Beijing
Authors
Zhang, Ziyin
Zhang, Xiaoling
Gong, Daoyi
Quan, Weijun
Zhao, Xiujuan
Ma, Zhiqiang
Kim, Seong-Joong
Subject
Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
Keywords
PM2.5; O3; Meteorological factors; Haze days; Beijing
Issue Date
2015
Citation
Zhang, Ziyin, et al. 2015. "Evolution of surface O3 and PM2.5 concentrations and their relationships with meteorological conditions over the last decade in Beijing". Atmospheric Environment, 108: 67-75.
Abstract
In this study, hourly and daily records since 2005 and correlation, regression and composite methods were used to analyze the long-term evolution of surface O3 and PM2.5 concentrations at the rural station of Shangdianzi (SDZ) and urban station of Baolian (BL) over Beijing and their relationships with meteorological conditions. The results show that the mean concentrations of PM2.5 (O3) decreased (increased) at the urban and rural stations over the last decade. The linear trends of the annual mean concentrations of PM2.5 at BL and SDZ were 31.8 ug/m3 /10yr (4.3%/yr) (p < 0.01) and 13.3 ug/m3 /10yr (2.9%/yr) (p < 0.05), respectively. In winter, the mean wind speed (Ws) and relative humidity (RH) were the most closely correlated with O3 at both stations, whereas RH and sunshine hours (S) were most closely correlated with PM2.5. The correlation coefficients and explained variances in spring and autumn were generally less than those in winter and greater than those in summer. Moreover, increase in precipitation can significantly reduce the PM2.5 concentration in both urban and rural areas in Beijing, whereas trace and light precipitation more effectively decreases the O3 concentration. Concentrations of PM2.5 (O3) on haze days increased by 114% (3%) and 162% (20%) compared with that on non-haze days at the urban and rural stations, respectively. This result suggests that haze is a major manifestation of air pollution in Beijing
DOI
http://dx.doi.org/10.1016/j.atmosenv.2015.02.071
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