气候变化领域集成服务门户(CCPortal): Chemical formation pathways of secondary organic aerosols in the Beijing-Tianjin-Hebei region in wintertime

CCPortal

DOI	10.1016/j.atmosenv.2020.117996
	Chemical formation pathways of secondary organic aerosols in the Beijing-Tianjin-Hebei region in wintertime
	Li J.; Han Z.; Sun Y.; Li J.; Liang L.
发表日期	2021
ISSN	1352-2310
卷号	244
英文摘要	A regional air quality model system (RAQMS) was developed by incorporating an aqueous reaction mechanism for secondary organic aerosol (SOA) formation and primary semi-volatile (SVOC) and intermediate volatile organic compounds (IVOC) precursors to investigate various chemical pathways for SOA formation in the Beijing-Tianjin-Hebei (BTH) region in wintertime. Model comparison against observations demonstrates that the model is able to well reproduce meteorological variables and major aerosol chemical components, and the model improves SOA simulation significantly by including primary S/IVOCs (SVOC + IVOC) and aqueous reactions into the model. SVOC and IVOC emissions were relatively higher over the regions from southern Hebei province to Beijing and Tianjin, with the emission rates up to 0.15 mg m−2 hr−1 and 0.3 mg m−2 hr−1, respectively. The glyoxal (GLY) and methylglyoxal (MGLY) emissions were similar in distribution to those of S/IVOC emissions, with the maximum of 0.08 mg m −2 hr−1. The simulated SOA concentrations exhibited a southwest-northeast belt extending from southern Hebei to Beijing, with the maximum of 35 μg m−3 in southern Hebei province. The average contributions from various precursors or chemical pathways to SOA formation during the study period were estimated, in which AVOCs (anthropogenic VOCs), SVOCs, IVOCs, BVOCs (biogenic VOCs), GLY and MGLY contributed 38.4%, 24.9%, 28.4%, 0.2% and 8.1% of SOA mass concentration, respectively, in the BTH region. The maximum average contribution of GLY and MGLY to SOA reached 16% in southern Hebei province during a severe haze episode. From the clean to haze periods, concentrations of all SOA components apparently increased along with increasing atmospheric stability and weakening dispersion, but the increasing rates of SOA concentration produced by AVOCs and aqueous reactions were larger than those by primary S/IVOCs due to different chemical processes, and the AVOC-produced SOA dominated over the other SOA components during the haze periods. © 2020 Elsevier Ltd
关键词	Aqueous uptake BTH region Glyoxal Methylglyoxal S/IVOCs Secondary organic aerosol
语种	英语
scopus关键词	Aerosols; Air quality; Atmospheric movements; Reaction intermediates; Volatile organic compounds; Aerosol chemical components; Atmospheric stability; Beijing-tianjin-hebei regions; Formation pathways; Mass concentration; Meteorological variables; Regional air quality modeling; Secondary organic aerosols; Chemical stability; glyoxal; isoprene; methylglyoxal; terpene; volatile organic compound; aerosol; air quality; chemical analysis; concentration (composition); emission; haze; meteorology; volatile organic compound; winter; air pollution; air quality; Article; atmospheric deposition; atmospheric dispersion; carbon footprint; chemical composition; chemical reaction; China; controlled study; haze; mass; precursor; priority journal; reaction analysis; secondary organic aerosol; simulation; winter; Beijing [China]; China; Hebei; Tianjin
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/248798
作者单位	Key Laboratory of Regional Climate-Environment for Temperate East Asia (RCE-TEA), Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences (CAS), Beijing, 100029, China; University of Chinese Academy of Sciences, Beijing, 100049, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
推荐引用方式 GB/T 7714	Li J.,Han Z.,Sun Y.,et al. Chemical formation pathways of secondary organic aerosols in the Beijing-Tianjin-Hebei region in wintertime[J],2021,244.
APA	Li J.,Han Z.,Sun Y.,Li J.,&Liang L..(2021).Chemical formation pathways of secondary organic aerosols in the Beijing-Tianjin-Hebei region in wintertime.ATMOSPHERIC ENVIRONMENT,244.
MLA	Li J.,et al."Chemical formation pathways of secondary organic aerosols in the Beijing-Tianjin-Hebei region in wintertime".ATMOSPHERIC ENVIRONMENT 244(2021).