DOI: 10.1016/j.atmosenv.2015.01.061
Scopus记录号: 2-s2.0-84922677301
论文题名: Nitrous acid (HONO) in a polluted subtropical atmosphere: Seasonal variability, direct vehicle emissions and heterogeneous production at ground surface
作者: Xu Z ; , Wang T ; , Wu J ; , Xue L ; , Chan J ; , Zha Q ; , Zhou S ; , Louie P ; K ; K ; , Luk C ; W ; Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 106 起始页码: 100
结束页码: 109
语种: 英语
英文关键词: Black carbon
; Heterogeneous reaction
; Nitrous acid
; Seasonal variation
; Vehicle emission
Scopus关键词: Atmospheric chemistry
; Carbon
; Nitrogen oxides
; Vehicles
; Black carbon
; Heterogeneous reactions
; Nitrous acid
; Seasonal variation
; Vehicle emission
; Inorganic acids
; black carbon
; nitrogen dioxide
; nitrous acid
; atmospheric plume
; atmospheric pollution
; black carbon
; concentration (composition)
; heterogeneity
; photochemistry
; seasonal variation
; subtropical region
; suburban area
; traffic emission
; troposphere
; air pollution
; Article
; autumn
; exhaust gas
; Hong Kong
; measurement
; night
; photochemistry
; plume
; priority journal
; seasonal variation
; simulation
; spring
; suburban area
; troposphere
; China
; Hong Kong
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: Although nitrous acid (HONO) plays an important role in the chemistry of polluted atmospheres, its atmospheric abundances and sources are still not well understood. This paper reports ambient measurements of HONO taken over four select months in different seasons at a suburban site in Hong Kong. The data were analyzed to elucidate the seasonal characteristics, emission ratios and rates of heterogeneous production. The monthly averaged HONO concentrations ranged from 0.35±0.30ppbv in late spring (May) to 0.93±0.67ppbv in late autumn (November). The similar variation patterns of HONO, NOx, and traffic flow from midnight to rush hours suggest that the HONO concentration was strongly influenced by vehicle emissions. The emission ratios (HONO/NOx) were derived from an analysis of 21 fresh plumes (NO/NOx0.80), with the range of 0.5-1.6%. The large variability in the emission ratios is attributed to the reaction of NO2 on black carbon (BC) emitted from vehicles, based on a strong correlation between the HONO/NOx and concurrently measured BC. The mean conversion rate of NO2 to HONO on ground surface during nighttime estimated on nine select days was 0.52 × 10-2h-1, which is relatively low compared with other reported values. This paper highlights a large variability in vehicle emission ratios and heterogeneous conversions of NO2 at ground surface. Photochemical models must consider this variability to better simulate the primary sources of HONO and subsequent photochemistry in the lower part of the troposphere. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81900
Appears in Collections: 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, The Hong Kong Polytechnic University, Hong Kong; Environmental Protection Department, Government of the Hong Kong Special Administrative Region, Hong Kong
Recommended Citation:
Xu Z,, Wang T,, Wu J,et al. Nitrous acid (HONO) in a polluted subtropical atmosphere: Seasonal variability, direct vehicle emissions and heterogeneous production at ground surface[J]. Atmospheric Environment,2015-01-01,106