气候变化领域集成服务门户(CCPortal): The reductions of oxalate and its precursors in cloud droplets relative to wet particles

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DOI	10.1016/j.atmosenv.2020.117632
	The reductions of oxalate and its precursors in cloud droplets relative to wet particles
	Lin Q.; Yang Y.; Fu Y.; Jiang F.; Zhang G.; Peng L.; Lian X.; Bi X.; Li L.; Chen D.; Ou J.; Tang M.; Wang X.; Peng P.; Sheng G.
发表日期	2020
ISSN	1352-2310
卷号	235
英文摘要	The formation mechanism of oxalate in the aqueous phase remains uncertain. Approximately 600 000 oxalate-containing particles and 450 000 its precursors-containing particles (e.g., acetate, glyoxylate, pyruvate and malonate) were obtained using a single particle aerosol mass spectrometer at a mountain site in southern China from 9 May to 4 June, 2018. The number fraction of oxalate or its precursors was compared within three representative aerosols with different liquid water contents including cloud droplet residues (RES), cloud interstitial particles (INTER) and cloud-free ambient particles (AMB). Lower number fraction of oxalate was found in the RES relative to INTER and AMB, mostly attributed to the decrease in precursors. This was conflicted with the enhancement of in-cloud oxalate formation previously reported. Further analysis indicated that the aerosol acidity had a major influence on the formation of precursors and their conversion to oxalate. With the increase of relative aerosol acidity (defined as the sum of sulfate and nitrate peak areas divided by ammonium peak area), the formation of precursors was increased while the conversion of precursors to oxalate was suppressed. Meanwhile, this influence was more pronounced in the INTER and AMB relative to RES. This work highlighted the roles of aerosol acidity and liquid water content in the aqueous phase formations of oxalate and its precursors. © 2020 Elsevier Ltd
关键词	Aerosol acidity Cloud residues LWC Oxalate Oxalate precursors
语种	英语
scopus关键词	Aerosols; Drops; Sulfur compounds; Aerosol mass spectrometers; Ambient particles; Formation mechanism; Interstitial particles; Liquid water content; Oxalate formations; Single particle; Southern China; Oxalic acid; acetic acid; ammonia; glyoxylic acid; nitrate; oxalic acid; pyruvic acid; sulfate; acidity; aerosol; cloud droplet; formation mechanism; instrumentation; salt; acidity; aerosol; Article; chemical composition; cloud; comparative study; environmental temperature; Fenton reaction; liquid; particle size; precursor; priority journal; reduction (chemistry); water content; China
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/249080
作者单位	State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, China; University of Chinese Academy of Sciences, Beijing, 100039, China; Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou, 510632, China; State Environmental Protection Key Laboratory of Regional Air Quality Monitoring, Guangdong Environmental Monitoring Center, Guangzhou, 510308, China; Shaoguan Environmental Monitoring Center, Shaoguan, 512026, China
推荐引用方式 GB/T 7714	Lin Q.,Yang Y.,Fu Y.,et al. The reductions of oxalate and its precursors in cloud droplets relative to wet particles[J],2020,235.
APA	Lin Q..,Yang Y..,Fu Y..,Jiang F..,Zhang G..,...&Sheng G..(2020).The reductions of oxalate and its precursors in cloud droplets relative to wet particles.ATMOSPHERIC ENVIRONMENT,235.
MLA	Lin Q.,et al."The reductions of oxalate and its precursors in cloud droplets relative to wet particles".ATMOSPHERIC ENVIRONMENT 235(2020).