DOI: 10.1016/j.atmosenv.2015.08.083
Scopus记录号: 2-s2.0-84940770291
论文题名: Re-examination of C1-C5 alkyl nitrates in Hong Kong using an observation-based model
作者: Lyu X ; P ; , Ling Z ; H ; , Guo H ; , Saunders S ; M ; , Lam S ; H ; M ; , Wang N ; , Wang Y ; , Liu M ; , Wang T
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 120 起始页码: 28
结束页码: 37
语种: 英语
英文关键词: Alkyl nitrate
; Field observation
; O3 production
; PBM-MCM model
; Photochemical formation
Scopus关键词: Carbon
; Nitrogen compounds
; Photochemical forming
; Reduction
; Alkyl nitrates
; Average concentration
; Field measurement data
; Field observations
; Master chemical mechanism
; Observation-based model
; Photochemical box model
; Photochemical formation
; Nitrates
; 2 butyl nitrate
; 2 pentyl nitrate
; 3 pentyl nitrate
; carbon
; n propyl nitrate
; nitrate
; nitric acid derivative
; nitrogen
; ozone
; propyl nitrate
; unclassified drug
; atmospheric chemistry
; atmospheric modeling
; biomass burning
; carbon emission
; concentration (composition)
; field method
; in situ measurement
; nitrate
; observational method
; ozone
; photochemistry
; reaction kinetics
; rural area
; Article
; autumn
; biomass
; Hong Kong
; nitrogen partitioning
; priority journal
; simulation
; spring
; 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: The photochemical formation of alkyl nitrates (RONO2) and their impact on ozone (O3) formation were investigated using a Photochemical Box Model incorporating the Master Chemical Mechanism (PBM-MCM). The model was constrained with field measurement data collected on selected O3 episode days at Tai O, a rural-coastal site in southwestern Hong Kong, from August 2001-December 2002. The in-situ observations showed that the sum of C1-C5 RONO2 varied from 30.7 ± 14.8 pptv in spring to 120.7 ± 10.4 pptv in autumn, of which 2-butyl nitrate dominated with the highest average concentration of 30.8 ± 2.6 pptv. Model simulations indicated that the pathway of CH3O reacting with NO2, proposed in our previous study, made minor contributions (11.3 ± 0.7%) to methyl nitrate formation. Indeed, 51.8 ± 3.1% and 36.5 ± 6.3% of the methyl nitrate was attributed to the reaction of CH3O2+NO and to oceanic emissions/biomass burning, respectively. For the C2-C5 alkyl nitrates, the contribution of photochemical formation increased with increasing carbon number, ranging from 64.4 ± 4.0% for ethyl nitrate (EtONO2) to 72.6 ± 4.2% for 2-pentyl nitrate (2-PenONO2), while the contribution of oceanic emissions/biomass burning decreased from 35.1 ± 6.5% for EtONO2 to 26.8 ± 6.8% for 2-PenONO2. Model simulations of photochemical O3 levels influenced by RONO2 chemistry showed that the formation of methyl-, ethyl-, i-propyl-, n-propyl-, 2-butyl-, 2-pentyl-, and 3-pentyl-nitrates led to O3 reduction of 0.05 ± 0.03, 0.05 ± 0.03, 0.06 ± 0.02, 0.02 ± 0.02, 0.18 ± 0.04, 0.09 ± 0.02 and 0.06 ± 0.02 ppbv, respectively, with an average reduction rate of 11.0 ± 3.2 ppbv O3 per 1 ppbv RONO2 formation. The C1-C5 RONO2 constituted 18.6 ± 1.9% of the entire RONO2, and had a nitrogen reserve of 4.1 ± 0.2%, implying their potential influence on O3 production in downwind areas. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81482
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong; Department of Atmospheric Science, School of Environmental Science and Engineering, Sun Yat-sen University, China; School of Chemistry and Biochemistry, University of Western Australia, Perth, WA, Australia; Pacific Environment Limited, Perth, WA, Australia
Recommended Citation:
Lyu X,P,, Ling Z,et al. Re-examination of C1-C5 alkyl nitrates in Hong Kong using an observation-based model[J]. Atmospheric Environment,2015-01-01,120