DOI: 10.1016/j.atmosenv.2017.05.012
Scopus记录号: 2-s2.0-85019661225
论文题名: Strong deviations from the NO-NO2-O3 photostationary state in the Pearl River Delta: Indications of active peroxy radical and chlorine radical chemistry
作者: Ma Y ; , Lu K ; , Chou C ; C ; -K ; , Li X ; , Zhang Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 163 起始页码: 22
结束页码: 34
语种: 英语
英文关键词: Chlorine chemistry
; Leighton ratio
; Pearl River Delta
; Peroxy radical
; RACM2
Scopus关键词: Atmospheric chemistry
; Chemical analysis
; Gases
; Gems
; Meteorology
; Nitrogen compounds
; Nitrogen oxides
; Ozone
; River pollution
; Rivers
; Sensitivity analysis
; Volatile organic compounds
; Chlorine chemistry
; Leighton ratio
; Pearl River delta
; Peroxy radicals
; RACM2
; Chlorine
; chlorine
; halogen
; nitric oxide
; nitrogen dioxide
; ozone
; peroxy radical
; atmospheric chemistry
; atmospheric modeling
; chlorine
; concentration (composition)
; environmental indicator
; measurement method
; nitrogen oxides
; ozone
; peroxy radical
; photochemistry
; sensitivity analysis
; trace gas
; accuracy
; air pollution
; Article
; atmosphere
; chemical analysis
; China
; concentration (parameters)
; gas analysis
; limit of detection
; oxidation
; photochemistry
; photostationary state
; priority journal
; river
; sensitivity analysis
; uncertainty
; China
; Guangdong
; Zhujiang Delta
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: Simultaneous measurements of meteorological data, trace gases, and volatile organic compounds were made in two regional sites, viz. Backgarden and Kaiping, in the Pearl River Delta (PRD) during summer and autumn, respectively. The strong deviations from the NO-NO2-O3 Photostationary State, quantified by the leighton ratios, are carefully deduced through a comprehensive data set consist of the high-quality measurements of NO, NO2, O3 and JNO2 as well as the peroxy radical measurements. This is the first report of the Leighton ratio in China, with relatively high recorded values of 2.3 ± 0.4 (Backgarden) and 3.1 ± 1.4 (Kaiping), suggesting a strongly oxidising atmosphere in the PRD, typical of the ozone pollution season. A sensitivity analysis using a zero-dimensional chemical box model based on the regional atmospheric chemistry mechanism, version 2 (RACM2) constrained by the experimental measurements, indicated that peroxy radicals account for 70 (Backgarden) and 66% (Kaiping) of the observed positive deviations from the NOx photostationary state (characterized by a Leighton ratio of 1) on average. We consider that the remaining deviations result from neglecting the effects of chlorine chemistry, so we introduced a Cl chemistry module into RACM2, and the modelled results for Cl were as follows: 4.7 × 10−4 pptv in Backgarden and 1.3 × 10−3 pptv in Kaiping; these results are lower than the Cl concentration derived from the NOx photostationary state. More work is required to confirm the role of additional peroxy radical sources at both high and low NOx regimes, as well as that of the halogen radicals, in perturbing the NO-NOx-O3 cycle, which would significantly enhance trace gas removal and photochemical ozone production. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82469
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China; Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China
Recommended Citation:
Ma Y,, Lu K,, Chou C,et al. Strong deviations from the NO-NO2-O3 photostationary state in the Pearl River Delta: Indications of active peroxy radical and chlorine radical chemistry[J]. Atmospheric Environment,2017-01-01,163