DOI: 10.1016/j.atmosenv.2014.01.058
Scopus记录号: 2-s2.0-84894239955
论文题名: Characteristics of heavy aerosol pollution during the 2012-2013 winter in Beijing, China
作者: Quan J ; , Tie X ; , Zhang Q ; , Liu Q ; , Li X ; , Gao Y ; , Zhao D
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 88 起始页码: 83
结束页码: 89
语种: 英语
英文关键词: Aerosol
; Beijing
; Fog and haze
; Low visibility
; PBL height
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: A comprehensive measurement was carried out to analyze the heavy haze events during 2012-2013 winter in Beijing. The measured variables include some important meteorological parameters, such wind directions, wind speeds, relative humidity (RH), planetary boundary layer (PBL), solar radiation, and visibility. The aerosol composition and concentrations (including particular matters (PM2.5), nitrate (NO3), sulfate (SO4), ammonium (NH4)) as well as their gas-phase precursors (including nitrogen oxides (NOx) and sulfur dioxide (SO2)) were analyzed during the period between Nov. 16, 2012 and Jan. 15, 2013. The results show that the hourly mean concentrations of PM2.5 often exceeded 200μg/m3, with a maximum concentration of 600μg/m3 on Jan. 13, 2013. The relative humidity was increased during the haze events, indicating that both aerosol concentrations and RH had important effect on the reduction of visibility, causing the occurrence of the haze events. Because the wind speeds were generally low (less than 1m/s) during the haze event, the vertical dispersion and the PBL heights were very important factors for causing the strong variability of aerosol concentrations. This study also finds that under the lower visibility condition, the conversion from the gas-phase of NOx and SO2 to the particle phase of NO3 and SO4 were higher than the values under the higher visibility condition. Because the lower visibility condition was corresponding to the lower photochemical activity than the higher visibility condition, the higher conversion from gas phase to particle phase in the lower visibility condition indicated that there was important heterogeneous formation of NO3 and SO4 during the heavy haze events. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80682
Appears in Collections: 气候变化事实与影响
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作者单位: Beijing Weather Modification Office, Beijing, China; Beijing Key Laboratory of Cloud, Precipitation and Atmospheric Water Resources, Beijing, China; Key Laboratory of Aerosol Science and Technology, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xian, China; National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Quan J,, Tie X,, Zhang Q,et al. Characteristics of heavy aerosol pollution during the 2012-2013 winter in Beijing, China[J]. Atmospheric Environment,2014-01-01,88