气候变化领域集成服务门户(CCPortal): Organic tracers of fine aerosol particles in central Alaska: Summertime composition and sources

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DOI	10.5194/acp-19-14009-2019
	Organic tracers of fine aerosol particles in central Alaska: Summertime composition and sources
	Kumar Deshmukh D.; Mozammel Haque M.; Kim Y.; Kawamura K.
发表日期	2019
ISSN	16807316
起始页码	14009
结束页码	14029
卷号	19 期号:22
英文摘要	p>PMspan classCombining double low line"inline-formula">2.5/span> aerosols were collected at Fairbanks (64.51span classCombining double low line"inline-formula">ĝ'/span> N and 147.51span classCombining double low line"inline-formula"/span> W) in central Alaska during the summer of 2009 and analyzed for organic tracer compounds using a gas chromatograph-mass spectrometer. The organic compounds were grouped into 14 classes based on their functional groups and sources. Concentrations of the total organics measured ranged from 113 to 1664 ng mspan classCombining double low line"inline-formula">-3/span> (avg 535 ng m classCombining double low line"inline-formula">-3>). Anhydrosugars (avg 186 ng m classCombining double low line"inline-formula">-3>) and classCombining double low line"inline-formula">i>n/i>>-Alkanoic acids (avg 185 ng m classCombining double low line"inline-formula">-3>) were 2 major classes among the 14 compound classes. The similar temporal trends and strong positive correlations among anhydrosugars and classCombining double low line"inline-formula">i>n/i>>-Alkanoic acids demonstrated that biomass burning (BB) is the major source of organic aerosols (OAs) in central Alaska. The dominance of higher molecular weight classCombining double low line"inline-formula">i>n/i>>-Alkanoic acids over lower molecular weight homologs and their carbon preference index (5.6-9.8) confirmed that they were mostly emitted from plant waxes during BB in central Alaska. The mass concentration ratios of levoglucosan to mannosan denoted that softwood is the main biomass burned. The rainfall event distinctly enhanced the levels of mannitol and arabitol due to the growth of fungi and active discharge of fungal spores in the subarctic region. Molecular compositions of biogenic secondary organic aerosol (BSOA) tracers inferred that isoprene is a crucial precursor of BSOA over central Alaska. Our results suggest forest fires and plant emissions to be the crucial factors controlling the levels and molecular composition of OAs in central Alaska. We propose that PM classCombining double low line"inline-formula">2.5> laden with OAs derived in central Alaska may significantly impact the air quality and climate in the Arctic via long-range atmospheric transport. © 2019 American Institute of Physics Inc.. All rights reserved.
语种	英语
scopus关键词	aerosol; air quality; atmospheric transport; biomass burning; concentration (composition); long range transport; organic compound; particulate matter; summer; tracer; Alaska; Arctic; United States; Fungi
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/144751
作者单位	Chubu Institute for Advanced Studies, Chubu University, Kasugai, 487-8501, Japan; Yale-NUIST Center on Atmospheric Environment, School of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing, 210044, China; International Arctic Research Center, University of Alaska Fairbanks, Fairbanks, 99775, United States
推荐引用方式 GB/T 7714	Kumar Deshmukh D.,Mozammel Haque M.,Kim Y.,et al. Organic tracers of fine aerosol particles in central Alaska: Summertime composition and sources[J],2019,19(22).
APA	Kumar Deshmukh D.,Mozammel Haque M.,Kim Y.,&Kawamura K..(2019).Organic tracers of fine aerosol particles in central Alaska: Summertime composition and sources.Atmospheric Chemistry and Physics,19(22).
MLA	Kumar Deshmukh D.,et al."Organic tracers of fine aerosol particles in central Alaska: Summertime composition and sources".Atmospheric Chemistry and Physics 19.22(2019).