气候变化领域集成服务门户(CCPortal): Quantification of solid fuel combustion and aqueous chemistry contributions to secondary organic aerosol during wintertime haze events in Beijing

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DOI	10.5194/acp-21-9859-2021
	Quantification of solid fuel combustion and aqueous chemistry contributions to secondary organic aerosol during wintertime haze events in Beijing
	Tong Y.; Pospisilova V.; Qi L.; Duan J.; Gu Y.; Kumar V.; Rai P.; Stefenelli G.; Wang L.; Wang Y.; Zhong H.; Baltensperger U.; Cao J.; Huang R.-J.; Prévôt A.S.H.; Slowik J.G.
发表日期	2021
ISSN	1680-7316
起始页码	9859
结束页码	9886
卷号	21 期号:12
英文摘要	In recent years, intense haze events in megacities such as Beijing have received significant attention. Although secondary organic aerosol (SOA) has been identified as a major contributor to such events, knowledge of its sources and formation mechanisms remains uncertain. We investigate this question through the first field deployment of the extractive electrospray ionisation time-of-flight mass spectrometer (EESI-TOF) in Beijing, together with an Aerodyne long-time-of-flight aerosol mass spectrometer (L-TOF AMS). Measurements were performed during autumn and winter 2017, capturing the transition from non-heating to heating seasons. Source apportionment resolved four factors related to primary organic aerosols (traffic, cooking, biomass burning, and coal combustion), as well as four related to SOA. Of the SOA factors, two were related to solid fuel combustion (SFC), one to SOA generated from aqueous chemistry, and one to mixed/indeterminate sources. The SFC factors were identified from spectral signatures corresponding to aromatic oxidation products, while the aqueous SOA factor was characterised by signatures of small organic acids and diacids and unusually low CO+/CO2+ fragment ratios measured by the AMS. Solid fuel combustion was the dominant source of SOA during the heating season. However, a comparably intense haze event was also observed in the non-heating season and was dominated by the aqueous SOA factor. During this event, aqueous chemistry was promoted by the combination of high relative humidity and air masses passing over high-NOx regions to the south and east of Beijing, leading to high particulate nitrate. The resulting high liquid water content was highly correlated with the concentration of the aqueous SOA factor. These results highlight the strong compositional variability between different haze events, indicating the need to consider multiple formation pathways and precursor sources to describe SOA during intense haze events in Beijing. © 2021 Yandong Tong et al.
语种	英语
scopus关键词	aerosol formation; aqueous solution; biomass burning; carbon dioxide; carbon emission; combustion; haze; mass spectrometry; winter; Beijing [China]; 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/246768
作者单位	Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen, 5232, Switzerland; Key Lab of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; Tofwerk AG, Uttigenstrasse 22, Thun, 3600, Switzerland
推荐引用方式 GB/T 7714	Tong Y.,Pospisilova V.,Qi L.,et al. Quantification of solid fuel combustion and aqueous chemistry contributions to secondary organic aerosol during wintertime haze events in Beijing[J],2021,21(12).
APA	Tong Y..,Pospisilova V..,Qi L..,Duan J..,Gu Y..,...&Slowik J.G..(2021).Quantification of solid fuel combustion and aqueous chemistry contributions to secondary organic aerosol during wintertime haze events in Beijing.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(12).
MLA	Tong Y.,et al."Quantification of solid fuel combustion and aqueous chemistry contributions to secondary organic aerosol during wintertime haze events in Beijing".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.12(2021).