DOI: 10.1016/j.atmosenv.2018.03.047
Scopus记录号: 2-s2.0-85044514885
论文题名: Characteristics of atmospheric ammonia and its relationship with vehicle emissions in a megacity in China
作者: Wang R ; , Ye X ; , Liu Y ; , Li H ; , Yang X ; , Chen J ; , Gao W ; , Yin Z
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 182 起始页码: 97
结束页码: 104
语种: 英语
英文关键词: Ammonia
; Seasonal variability
; Shanghai
; Traffic emissions
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: Atmospheric ammonia plays an important role in haze formation in East China. In this study, long-term measurements of NH3 concentrations were implemented at urban, suburban, and tunnel sites in Shanghai, the largest city in East China. The average monthly ammonia concentrations at the urban site varied from 3.7 ppb to 14.5 ppb and exhibited the highest levels in summer and lowest levels in winter, indicating that the biological emissions and agriculture in the surrounding areas are important contributors. The suburban NH3 levels were significantly higher in autumn compared to those at the urban site, indicating the important contribution of agricultural activities. Regardless of the season, the difference of NH3 concentrations between the tunnel and urban sites remained almost constant. On average, the tunnel NH3 level was three times higher than that of the nearby urban site, indicating strong vehicle NH3 emissions in the tunnel. The tunnel NH3 levels on weekdays were comparable to those on weekends, a result that was in agreement with the daily average traffic volume. It was estimated that the vehicle emissions contributed 12.6–24.6% of the atmospheric NH3 in the urban area and 3.8–7.5% for the whole area of Shanghai. Our results suggest that vehicle NH3 emissions should be considered, although agricultural emissions are still more important for mitigating severe haze pollution during wintertime in the megacities of China. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82868
Appears in Collections: 气候变化事实与影响
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作者单位: Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Fudan University, Shanghai, China; Institute of Atmospheric Sciences, Fudan University, Shanghai, China; Shanghai Key Laboratory of Meteorology and Health, Shanghai, China
Recommended Citation:
Wang R,, Ye X,, Liu Y,et al. Characteristics of atmospheric ammonia and its relationship with vehicle emissions in a megacity in China[J]. Atmospheric Environment,2018-01-01,182