气候变化领域集成服务门户(CCPortal): Measurements of submicron organonitrate particles: Implications for the impacts of NOx pollution in a subtropical forest

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DOI	10.1016/j.atmosres.2020.105080
	Measurements of submicron organonitrate particles: Implications for the impacts of NOx pollution in a subtropical forest
	Salvador C.M.; Chou C.C.-K.; Cheung H.-C.; Ho T.-T.; Tsai C.-Y.; Tsao T.-M.; Tsai M.-J.; Su T.-C.
发表日期	2020
ISSN	0169-8095
卷号	245
英文摘要	Organonitrates (ONs) are an important component of atmospheric aerosols that signify the perturbation of nitrogen oxides (NOx) pollution in the remote atmosphere. This study investigated the mass concentration and molecular composition of ONs in submicron particulate matters (PM1) at a subtropical forest site (Xitou), which located downwind the Taichung metropolis in the Central Taiwan. Here we showed that transport of urban air pollution with local circulations caused elevation in the ambient concentration of ONs in the forested area. In addition, the levels of ONs were positively correlated with ozone mixing ratio and were negatively correlated with the relative humidity, suggesting that the ONs were regulated by photochemistry and hydrolysis. The results also showed that the mass concentration of the ONs was significantly correlated with the number density of nanoparticles (d < 100 nm), implying the role of ONs in the formation and/or growth processes of atmospheric aerosols. Mass spectra analysis revealed five major ONs, which were characterized by the molecular skeletons of either isoprene or monoterpenes. The molecular profiles suggested that the reactions between nitrate radicals and biogenic volatile organic compounds (BVOCs) significantly contributed to the formation of ONs, which thereby represented a major sink of the functional BVOCs in the forested area. © 2020 Elsevier B.V.
关键词	Atmospheric aerosols Atmospheric humidity Atmospheric movements Atmospheric thermodynamics Forestry Mass spectrometry Monoterpenes Nitrogen oxides Tropics Urban transportation Volatile organic compounds Ambient concentrations Biogenic volatile organic compounds Mass concentration Molecular compositions Molecular skeleton Sub-micron particulates Subtropical forests Urban air pollution Air pollution atmosphere-biosphere interaction atmospheric pollution concentration (composition)measurement method nitrate nitrous oxide particulate matter urban area Taichung Taiwan
语种	英语
来源机构	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132376
推荐引用方式 GB/T 7714	Salvador C.M.,Chou C.C.-K.,Cheung H.-C.,et al. Measurements of submicron organonitrate particles: Implications for the impacts of NOx pollution in a subtropical forest[J]. Atmospheric Research,2020,245.
APA	Salvador C.M..,Chou C.C.-K..,Cheung H.-C..,Ho T.-T..,Tsai C.-Y..,...&Su T.-C..(2020).Measurements of submicron organonitrate particles: Implications for the impacts of NOx pollution in a subtropical forest.,245.
MLA	Salvador C.M.,et al."Measurements of submicron organonitrate particles: Implications for the impacts of NOx pollution in a subtropical forest".245(2020).