气候变化领域集成服务门户(CCPortal): Roles of Semivolatile/Intermediate-Volatility Organic Compounds on SOA Formation Over China During a Pollution Episode: Sensitivity Analysis and Implications for Future Studies

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DOI	10.1029/2020JD033999
	Roles of Semivolatile/Intermediate-Volatility Organic Compounds on SOA Formation Over China During a Pollution Episode: Sensitivity Analysis and Implications for Future Studies
	Wu L.; Ling Z.; Shao M.; Liu H.; Lu S.; Zhou S.; Guo J.; Mao J.; Hang J.; Wang X.
发表日期	2021
ISSN	2169897X
卷号	126 期号:8
英文摘要	To improve the performance of SOA simulations and to evaluate the roles of semivolatile/intermediate-volatility organic compounds (S/IVOCs) on SOA formation with focus on a winter pollution episode, an updated S/IVOC emission inventory over China and optimized reaction parameterization were incorporated into a regional air quality model (i.e., the WRF-Chem model). The simulation on atmospheric concentrations of SOA was improved with the inclusion of S/IVOC emissions and their degradation, wherein, the temporal mean bias between simulated and observed SOA concentrations decreased by 25%. With the updated S/IVOC emissions and chemical evolution parameterization, the fraction of observed SOA resolved by the model increased from 18% to 40%, of which 21% was attributed to the updated emissions while the remaining 1% was attributed to parameterization. The existence of discrepancy between observation and simulation indicated that other improvements are still needed for better simulation of SOA by the WRF-Chem model. Using updated OH reactivity coefficient for polycyclic aromatic hydrocarbons and adding the O3-initiated and NO3-initiated oxidation of S/IVOCs did not significantly impact SOA formation. Model results further suggested that high SOA concentrations were mainly distributed in the Sichuan Basin, the eastern and southern China, with higher concentrations observed at night rather than during daytime. Compared with the contributions of all precursors, SOA concentrations in China were dominated by those formed from S/IVOCs, which were more sensitive to S/IVOC emissions than other parameterizations. These findings highlight the roles of S/IVOCs in SOA formation over China and provide valuable insights for future SOA simulations. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Intermediate-volatility organic compounds; semivolatile organic compounds; sensitivity analysis; SOA
语种	英语
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/185317
作者单位	Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, School of Atmospheric Sciences, Sun Yat-sen University and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China; Institute for Environmental and Climate Research, Jinan University, Guangzhou, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China; College of Environmental Sciences and Engineering, Peking University, Beijing, China
推荐引用方式 GB/T 7714	Wu L.,Ling Z.,Shao M.,et al. Roles of Semivolatile/Intermediate-Volatility Organic Compounds on SOA Formation Over China During a Pollution Episode: Sensitivity Analysis and Implications for Future Studies[J],2021,126(8).
APA	Wu L..,Ling Z..,Shao M..,Liu H..,Lu S..,...&Wang X..(2021).Roles of Semivolatile/Intermediate-Volatility Organic Compounds on SOA Formation Over China During a Pollution Episode: Sensitivity Analysis and Implications for Future Studies.Journal of Geophysical Research: Atmospheres,126(8).
MLA	Wu L.,et al."Roles of Semivolatile/Intermediate-Volatility Organic Compounds on SOA Formation Over China During a Pollution Episode: Sensitivity Analysis and Implications for Future Studies".Journal of Geophysical Research: Atmospheres 126.8(2021).