globalchange  > 气候减缓与适应
DOI: 10.1002/2017JD028090
Scopus记录号: 2-s2.0-85044316927
论文题名:
The Optical Properties of Limonene Secondary Organic Aerosols: The Role of NO3, OH, and O3 in the Oxidation Processes
作者: Peng C.; Wang W.; Li K.; Li J.; Zhou L.; Wang L.; Ge M.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:6
起始页码: 3292
结束页码: 3303
语种: 英语
英文关键词: limonene ; NO3 ; optical properties ; SOA
Scopus关键词: absorption ; aerosol ; biogenic emission ; experimental study ; hydroxide ; instrumentation ; monoterpene ; nitrate ; optical property ; oxidation ; ozone ; radiative forcing ; refractive index
英文摘要: Limonene, a typical proxy of monoterpenes emitted from biogenic sources, plays an important role in secondary organic aerosol (SOA) formation. However, the optical properties of SOA generated from limonene under various oxidation pathways remain poorly understood. In this study, we investigate the refractive index (RI) of limonene SOA produced from four oxidation conditions with cavity ring-down spectrometer (CRDS) and photoacoustic extinctiometer operated at 532 and 375 nm. Our results show that there is a significant difference in RI values of SOA produced from NO3 oxidation compared to other oxidation pathways. The mean values of RI of SOA produced from NO3 oxidation, NOx oxidation, OH oxidation with NOx-free, and O3 oxidation experiments are 1.578, 1.469, 1.495, and 1.494 at 532 nm; and 1.591, 1.527, 1.513, and 1.537 at 375 nm, respectively, while no detectable absorption is found in all oxidation conditions. We attribute the high RI values of SOA by NO3 oxidation to two factors: a large proportion of organic nitrates and high-molecular-weight dimers/oligomers in the SOA. Our study results indicate that the nighttime chemistry may significantly influence the optical properties of limonene oxidation products. The RI values of limonene SOA generated under various oxidation conditions at different wavelengths retrieved in our laboratory experiments could help improve the model predictions for evaluating the effect of biogenic SOA on the global radiative forcing as well as climate change. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114257
Appears in Collections:气候减缓与适应

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作者单位: State Key Laboratory for Structural Chemistry of Unstable and Stable Species, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China; School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, China; Now at Air Quality Research Division, Environment and Climate Change Canada, Toronto, ON, Canada; Now at Institut de Combustion, Aérothermique, Réactivité et Environnement/OSUC, CNRS, Orléans, France; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China

Recommended Citation:
Peng C.,Wang W.,Li K.,et al. The Optical Properties of Limonene Secondary Organic Aerosols: The Role of NO3, OH, and O3 in the Oxidation Processes[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(6)
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