DOI: 10.1016/j.atmosenv.2015.01.042
Scopus记录号: 2-s2.0-84921810260
论文题名: Assessment of SAPRC07 with updated isoprene chemistry against outdoor chamber experiments
作者: Chen Y ; , Sexton K ; G ; , Jerry R ; E ; , Surratt J ; D ; , Vizuete W
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 105 起始页码: 109
结束页码: 120
语种: 英语
英文关键词: Atmospheric chemical mechanism
; Isoprene
; SAPRC07
; Smog chamber
Scopus关键词: Air pollution
; Methane
; Nitrogen oxides
; Volatile organic compounds
; Chamber experiments
; Chemical mechanism
; Non-methane hydrocarbons
; Oxidation chemistry
; SAPRC07
; Secondary organic aerosols
; Smog chambers
; Volatile organic compound (VOC)
; Isoprene
; hydroxyl radical
; isoprene
; isoprene epoxydiol
; nitrogen oxide
; unclassified drug
; volatile organic compound
; air pollution
; Article
; chemical modification
; gas
; oxidation
; priority journal
; secondary organic aerosol
; simulation
; Statewide Air Pollution Research Center 07
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: Isoprene, the most emitted non-methane hydrocarbon, is known to influence ozone (O3) formation in urban areas rich with biogenic emissions. To keep up with the recent advance on isoprene oxidation chemistry including the identification of isoprene epoxydiols (IEPOX) as a precursor to secondary organic aerosol (SOA), Xie etal. (2013) updated the SAPRC (Statewide Air Pollution Research Center)-07 chemical mechanism. It is currently unknown how the Xie modification of SAPRC07 impacts the ability of the model to predict O3. In this study we will evaluate the Xie mechanism with simulations of 24 isoprene experiments from the UNC Dual Gas-phase Chamber. Our results suggest that the new mechanism increases NOx (nitrogen oxides) inter-conversion and produces more O3 than SAPRC07 for all experiments. In lower-NOx experiments, the new mechanism worsens O3 performance in the wrong direction, increasing bias from 4.92% to 9.44%. We found increased NOx recycling from PANs accounts for that. This could be explained by more PANs made due to increased first generation volatile organic compound (VOC) products and hydroxyl radical (OH) production. © 2015 . Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81962
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, 166 Rosenau Hall CB#7431, Chapel Hill, NC, United States
Recommended Citation:
Chen Y,, Sexton K,G,et al. Assessment of SAPRC07 with updated isoprene chemistry against outdoor chamber experiments[J]. Atmospheric Environment,2015-01-01,105