气候变化领域集成服务门户(CCPortal): Process-based and observation-constrained SOA simulations in China: The role of semivolatile and intermediate-volatility organic compounds and OH levels

CCPortal

DOI	10.5194/acp-21-16183-2021
	Process-based and observation-constrained SOA simulations in China: The role of semivolatile and intermediate-volatility organic compounds and OH levels
	Miao R.; Chen Q.; Shrivastava M.; Chen Y.; Zhang L.; Hu J.; Zheng Y.; Liao K.
发表日期	2021
ISSN	1680-7316
起始页码	16183
结束页码	16201
卷号	21 期号:21
英文摘要	Organic aerosol (OA) is a major component of tropospheric submicron aerosol that contributes to air pollution and causes adverse effects on human health. Chemical transport models have difficulties in reproducing the variability in OA concentrations in polluted areas, hindering understanding of the OA budget and sources. Herein, we apply both process-based and observation-constrained schemes to simulate OA in GEOS-Chem. Comprehensive data sets of surface OA, OA components, secondary organic aerosol (SOA) precursors, and oxidants were used for model-observation comparisons. The base models generally underestimate the SOA concentrations in China. In the revised schemes, updates were made on the emissions, volatility distributions, and SOA yields of semivolatile and intermediate-volatility organic compounds (SVOCs and IVOCs) and additional nitrous acid sources. With all the model improvements, both the process-based and observation-constrained SOA schemes can reproduce the observed mass concentrations of SOA and show spatial and seasonal consistency with each other. Our best model simulations suggest that anthropogenic SVOCs and IVOCs are the dominant source of SOA, with a contribution of over 50% in most of China, which should be considered for pollution mitigation in the future. The residential sector may be the predominant source of SVOCs and IVOCs in winter, despite large uncertainty remaining in the emissions of IVOCs from the residential sector in northern China. The industry sector is also an important source of IVOCs, especially in summer. More SVOC and IVOC measurements are needed to constrain their emissions. Besides, the results highlight the sensitivity of SOA to hydroxyl radical (OH) levels in winter in polluted environments. The addition of nitrous acid sources can lead to over 30% greater SOA mass concentrations in winter in northern China. It is important to have good OH simulations in air quality models. © 2021 Ruqian Miao et al.
语种	英语
scopus关键词	air quality; atmospheric pollution; carbon emission; concentration (composition); summer; troposphere; volatile organic compound; winter; China
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246463
作者单位	State Key Joint Laboratory of Environmental Simulation and Pollution Control, BIC-ESAT and IJRC, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; Pacific Northwest National Laboratory, Richland, WA 99352, United States; Sichuan Academy of Environmental Policy and Planning, Sichuan, Chengdu, 610041, China; Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Engineering Technology Research Center of Environmental Cleaning Materials, Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Jiangsu, Nanjing, 210044, China
推荐引用方式 GB/T 7714	Miao R.,Chen Q.,Shrivastava M.,et al. Process-based and observation-constrained SOA simulations in China: The role of semivolatile and intermediate-volatility organic compounds and OH levels[J],2021,21(21).
APA	Miao R..,Chen Q..,Shrivastava M..,Chen Y..,Zhang L..,...&Liao K..(2021).Process-based and observation-constrained SOA simulations in China: The role of semivolatile and intermediate-volatility organic compounds and OH levels.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(21).
MLA	Miao R.,et al."Process-based and observation-constrained SOA simulations in China: The role of semivolatile and intermediate-volatility organic compounds and OH levels".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.21(2021).