气候变化领域集成服务门户(CCPortal): Pyruvic acid in the boreal forest: Gas-phase mixing ratios and impact on radical chemistry

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DOI	10.5194/acp-20-3697-2020
	Pyruvic acid in the boreal forest: Gas-phase mixing ratios and impact on radical chemistry
	Eger P.G.; Schuladen J.; Sobanski N.; Fischer H.; Karu E.; Williams J.; Riva M.; Zha Q.; Ehn M.; Quéléver L.L.J.; Schallhart S.; Lelieveld J.; Crowley J.N.
发表日期	2020
ISSN	1680-7316
起始页码	3697
结束页码	3711
卷号	20 期号:6
英文摘要	Pyruvic acid (CH3C(O)C(O)OH, 2-oxopropanoic acid) is an organic acid of biogenic origin that plays a crucial role in plant metabolism, is present in tropospheric air in both gas-phase and aerosol-phase, and is implicated in the formation of secondary organic aerosols (SOAs). Up to now, only a few field studies have reported mixing ratios of gas-phase pyruvic acid, and its tropospheric sources and sinks are poorly constrained. We present the first measurements of gas-phase pyruvic acid in the boreal forest as part of the IBAIRN (Influence of Biosphere-Atmosphere Interactions on the Reactive Nitrogen budget) field campaign in Hyytiälä, Finland, in September 2016. The mean pyruvic acid mixing ratio during IBAIRN was 96pptv, with a maximum value of 327pptv. From our measurements we estimated the overall pyruvic acid source strength and quantified the contributions of isoprene oxidation and direct emissions from vegetation in this monoterpene-dominated forested environment. Further, we discuss the relevance of gas-phase pyruvic acid for atmospheric chemistry by investigating the impact of its photolysis on acetaldehyde and peroxy radical production rates. Our results show that, based on our present understanding of its photochemistry, pyruvic acid is an important source of acetaldehyde in the boreal environment, exceeding ethane and propane oxidation by factors of ∼10∼20. © 2020 Author(s).
语种	英语
scopus关键词	aerosol; atmospheric chemistry; biogenic emission; boreal forest; gas flow; isoprene; mixing ratio; organic acid; oxidation; photolysis; radical; troposphere; Finland
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/247885
作者单位	Atmospheric Chemistry Department, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Helsinki, 00014, Finland; University of Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne, 69626, France
推荐引用方式 GB/T 7714	Eger P.G.,Schuladen J.,Sobanski N.,et al. Pyruvic acid in the boreal forest: Gas-phase mixing ratios and impact on radical chemistry[J],2020,20(6).
APA	Eger P.G..,Schuladen J..,Sobanski N..,Fischer H..,Karu E..,...&Crowley J.N..(2020).Pyruvic acid in the boreal forest: Gas-phase mixing ratios and impact on radical chemistry.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(6).
MLA	Eger P.G.,et al."Pyruvic acid in the boreal forest: Gas-phase mixing ratios and impact on radical chemistry".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.6(2020).