气候变化领域集成服务门户(CCPortal): Real-Time Characterization of Aerosol Compositions, Sources, and Aging Processes in Guangzhou During PRIDE-GBA 2018 Campaign

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DOI	10.1029/2021JD035114
	Real-Time Characterization of Aerosol Compositions, Sources, and Aging Processes in Guangzhou During PRIDE-GBA 2018 Campaign
	Chen W.; Ye Y.; Hu W.; Zhou H.; Pan T.; Wang Y.; Song W.; Song Q.; Ye C.; Wang C.; Wang B.; Huang S.; Yuan B.; Zhu M.; Lian X.; Zhang G.; Bi X.; Jiang F.; Liu J.; Canonaco F.; Prevot A.S.H.; Shao M.; Wang X.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:16
英文摘要	To investigate the chemical compositions, sources, and aging processes of submicron particles (PM1), a comprehensive field campaign was conducted in Guangzhou urban area of China during the autumn (October–November) of 2018. The average mass concentration of PM1 was 35.6 ± 20.8 µg m−3, which was mainly contributed by organic aerosols (OA, 42%), then followed by sulfate (25%) and inorganic nitrate (11%). The inorganic nitrate was found to be the main driving component (up to ∼50%) to account for the fast increase of PM1 during the polluted periods of Guangzhou autumn. The promotion effects of sulfate, aerosol liquid water content, and particles acidity on nitrate formation were systematically discussed. Source apportionment results showed 72% of OA in Guangzhou autumn was contributed by secondary OA (SOA), and 28% of primary OA (POA), including vehicle emission related hydrocarbon-like OA (HOA, 16%), nitrogen-containing OA (NOA, 3%) and cooking OA (COA, 8%). To explore the aging processes of OA, the dynamic variations of OA and its oxidation level as a function of ambient photochemical age are shown. Using an in situ field-deployed oxidation flow reactor, the heterogeneous reaction rate coefficients of ambient POA with OH radicals ((Formula presented.)) were estimated to be 4.0–5.4 × 10−13 cm3 molecules−1 s−1, which is equivalent to a lifetime of POA >2 weeks. The long heterogeneous lifetime of POA supports gas phase oxidation was the major pathway for ambient OA aging. The OH uptake coefficient ((Formula presented.)) was estimated to be 0.76–0.84, underlining that OH radicals can be taken up efficiently on ambient aerosols. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	aging process; elemental ratios; heterogeneous reaction; nitrate formation; organic aerosol source apportionment; uptake coefficient (γ)
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237062
作者单位	State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; CAS Center for Excellence in Deep Earth Science, Guangzhou, China; Chinese Academy of Sciences University, Beijing, China; Guangdong-Hong Kong-Macao, Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Science, Guangzhou, China; Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Chinese Academy of Science, Guangzhou, China; Institute for Environmental and Climate Research, Jinan University, Guangzhou, China; School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China; Paul Scherrer Institute, Laboratory of Atmospheric Chemistry, Villigen, Switzerland; Datalystica Ltd., Park innovAARE, Villigen, Switzerland
推荐引用方式 GB/T 7714	Chen W.,Ye Y.,Hu W.,et al. Real-Time Characterization of Aerosol Compositions, Sources, and Aging Processes in Guangzhou During PRIDE-GBA 2018 Campaign[J],2021,126(16).
APA	Chen W..,Ye Y..,Hu W..,Zhou H..,Pan T..,...&Wang X..(2021).Real-Time Characterization of Aerosol Compositions, Sources, and Aging Processes in Guangzhou During PRIDE-GBA 2018 Campaign.Journal of Geophysical Research: Atmospheres,126(16).
MLA	Chen W.,et al."Real-Time Characterization of Aerosol Compositions, Sources, and Aging Processes in Guangzhou During PRIDE-GBA 2018 Campaign".Journal of Geophysical Research: Atmospheres 126.16(2021).