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DOI	10.1016/j.atmosenv.2021.118717
	Seasonal characteristics of PM1 in Seoul, Korea, measured using HR-ToF-Aerosol Mass Spectrometer in 2018
	Song I.H.; Park J.S.; Park S.M.; Kim D.G.; Kim Y.W.; Shin H.J.
发表日期	2021
ISSN	1352-2310
卷号	266
英文摘要	In Korea, the characteristics of aerosols vary according to the four distinct seasons (spring, summer, fall, and winter); the seasonal variations are influenced by different air mass inflows of each season. Therefore, research is required to analyze the composition and characteristics of aerosols in different seasons. In this study, high-resolution time-of-flight aerosol mass spectrometry (HR-ToF-AMS) and positive matrix factorization (PMF) analyses were conducted in 2018 to examine the seasonal characteristics of aerosols with focus on organic aerosol in Seoul metropolitan area of South Korea. The results indicated that the seasonal non-refractory submicron particle (NR-PM1) concentration in Seoul metropolitan area ranged from 6.3 to 41.0 μg/m3, which was lower than those in other metropolitan areas of Northeast Asia and slightly higher than those in suburban and rural areas of South Asia and Europe. The organic aerosol concentration, which was the highest among PM1 components, ranged 3.5–14.24 μg/m3. In addition, a large increase in nitrate content was observed in high-concentration episodes. In all seasons, the O:C ratio and oxidation state were higher than those in previous studies, and it was estimated that the oxidation state was higher than those in other countries due to the influx of aged aerosols by long-range transport. In summer, the odd oxygen (Ox) concentration tends to be proportional to temperature and inversely proportional to humidity, indicating that the formation of fresh organic aerosol (OA) by active photochemical reaction is the main process of organic aerosol generation. In spring, fall, and winter, the Van Krevelen graph showed a slope of −0.68 ~ –0.99, indicating that carboxylic acid production was an important process for OA production. In addition, the causes of the high concentration episodes observed in spring and winter were estimated through the oxidation state of organic aerosols, PMF factor, and backward trajectory analyses. © 2021 The Authors
关键词	HR-ToF-AMS NR-PM1 Organic aerosol Oxidation state Seasonal characteristics Van Krevelen diagram
语种	英语
scopus关键词	Factorization; Mass spectrometry; Oxidation; Photochemical reactions; Aerosol mass spectrometry; High resolution; High-resolution time-of-flight aerosol mass spectrometry; NR-PM1; Organic aerosol; Oxidation state; Resolution time; Seasonal characteristics; Time-of flight; Van krevelen diagram; Aerosols; carboxylic acid; nitrate; oxygen; aerosol; air mass; mass spectrometry; metropolitan area; particulate matter; rural area; seasonal variation; suburban area; aerosol; Article; chemical composition; Europe; high resolution time of flight mass spectrometry; humidity; non-negative matrix factorization; oxidation; oxygen concentration; particulate matter; photochemistry; seasonal variation; South Korea; spring; summer; temperature; time of flight mass spectrometry; urban area; winter; Europe; Seoul [South Korea]; South Asia; South Korea
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248206
作者单位	Department of Air Quality Research, National Institute of Environmental Research of Korea, Incheon, 22689, South Korea; Ministry of Environment of Korea, Sejong, 30103, South Korea
推荐引用方式 GB/T 7714	Song I.H.,Park J.S.,Park S.M.,et al. Seasonal characteristics of PM1 in Seoul, Korea, measured using HR-ToF-Aerosol Mass Spectrometer in 2018[J],2021,266.
APA	Song I.H.,Park J.S.,Park S.M.,Kim D.G.,Kim Y.W.,&Shin H.J..(2021).Seasonal characteristics of PM1 in Seoul, Korea, measured using HR-ToF-Aerosol Mass Spectrometer in 2018.ATMOSPHERIC ENVIRONMENT,266.
MLA	Song I.H.,et al."Seasonal characteristics of PM1 in Seoul, Korea, measured using HR-ToF-Aerosol Mass Spectrometer in 2018".ATMOSPHERIC ENVIRONMENT 266(2021).