DOI: 10.1016/j.atmosres.2018.01.014
Scopus记录号: 2-s2.0-85044375933
论文题名: Summertime C1-C5 alkyl nitrates over Beijing, northern China: Spatial distribution, regional transport, and formation mechanisms
作者: Sun J. ; Li Z. ; Xue L. ; Wang T. ; Wang X. ; Gao J. ; Nie W. ; Simpson I.J. ; Gao R. ; Blake D.R. ; Chai F. ; Wang W.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2018
卷: 204 起始页码: 102
结束页码: 109
语种: 英语
英文关键词: Alkyl nitrate
; Beijing
; Master chemical mechanism
; Observation-based model
; Regional transport
Scopus关键词: Air pollution
; Nitrates
; Nitrogen oxides
; Paraffins
; Photochemical forming
; Rural areas
; Spatial distribution
; Urban transportation
; Alkyl nitrates
; Beijing
; Master chemical mechanism
; Observation-based model
; Regional transport
; Urban growth
; air quality
; atmospheric pollution
; atmospheric transport
; emission inventory
; formation mechanism
; mixing ratio
; nitrate
; nitrogen oxides
; spatial distribution
; summer
; urban pollution
; Beijing [Beijing (ADS)]
; Beijing [China]
; China
英文摘要: Alkyl nitrates (RONO2) are an important class of nitrogen oxides reservoirs in the atmosphere and play a key role in tropospheric photochemistry. Despite the increasing concern for photochemical air pollution over China, the knowledge of characteristics and formation mechanisms of alkyl nitrates in this region is limited. We analyzed C1-C5 alkyl nitrates measured in Beijing at a polluted urban site in summer 2008 and at a downwind rural site in summers of both 2005 and 2008. Although the abundances of NOx and hydrocarbons were much lower at the rural site, the mixing ratios of RONO2 were comparable between both sites, emphasizing the regional nature of alkyl nitrate pollution. Regional transport of urban plumes governed the elevated RONO2 levels at the rural site. The concentrations of C1-C2 RONO2 were significantly higher at the rural site in 2008 compared to 2005 despite a decline in NOx and anthropogenic VOCs, mainly owing to enhanced contributions from biogenic VOCs. The photochemical formation regimes of RONO2 were evaluated by both a simplified sequential reaction model and a detailed master chemical mechanism box model. The observed C4-C5 RONO2 levels can be well explained by the photochemical degradation of n-butane and n-pentane, while the sources of C1-C3 RONO2 were rather complex. In addition to the C1-C3 alkanes, biogenic VOCs and reactive aromatics were also important precursors of methyl nitrate, and alkenes and long-chain alkanes contributed to the formation of C2-C3 RONO2. This study provides insights into the spatial distribution, inter-annual variation and photochemical formation mechanisms of alkyl nitrate pollution over the Beijing area. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/108936
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Environment Research Institute, Shandong University, Ji'nan, Shandong, China; Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hong Kong; Chinese Research Academy of Environmental Sciences, Beijing, China; Joint International Research Laboratory of Atmospheric and Earth System Sciences, School of Atmospheric Sciences, Nanjing University, Nanjing, Jiangsu, China; Department of Chemistry, University of California at Irvine, Irvine, CA, United States
Recommended Citation:
Sun J.,Li Z.,Xue L.,et al. Summertime C1-C5 alkyl nitrates over Beijing, northern China: Spatial distribution, regional transport, and formation mechanisms[J]. Atmospheric Research,2018-01-01,204