globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2020.117632
论文题名:
The reductions of oxalate and its precursors in cloud droplets relative to wet particles
作者: 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.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 235
语种: 英语
英文关键词: Aerosols ; Drops ; Sulfur compounds ; Aerosol mass spectrometers ; Ambient particles ; Formation mechanism ; Interstitial particles ; Liquid water content ; Oxalate formations ; Single particle ; Southern China ; Oxalic acid
学科: Aerosol acidity ; Cloud residues ; LWC ; Oxalate ; Oxalate precursors
中文摘要: 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
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160698
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Lin Q.,Yang Y.,Fu Y.,et al. The reductions of oxalate and its precursors in cloud droplets relative to wet particles[J]. Atmospheric Environment,2020-01-01,235
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