气候变化领域集成服务门户(CCPortal): Alpine snowpit profiles of polar organic compounds from Mt. Tateyama central Japan: Atmospheric transport of organic pollutants with Asian dust

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DOI	10.1016/j.atmosenv.2020.117923
	Alpine snowpit profiles of polar organic compounds from Mt. Tateyama central Japan: Atmospheric transport of organic pollutants with Asian dust
	Pokhrel A.; Kawamura K.; Tachibana E.; Kunwar B.; Aoki K.
发表日期	2021
ISSN	1352-2310
卷号	244
英文摘要	Snowpit samples (n = 10) were collected (19 April 2008) from the snowpit sequences (depth 6.60 m) at the Murodo-Daira site (36.58°N, 137.60°E, elevation of 2450 m a.s.l.) of Mt. Tateyama (3015 m a.s.l.), central Japan. The first time, low molecular weight diacids, ω-oxoacids, pyruvic acid, and α-dicarbonyls were measured for this snowpit sequence. Higher concentrations of short-chain diacids (C2–C5) are observed in dusty snow than non-dusty snow samples. Longer chain diacids (C7–C12) are significant in granular and dusty snow samples. Aromatic and aliphatic unsaturated diacids showed higher concentrations in the slightly dusty layer deposited in winter. Except for a clean layer, molecular distributions of diacids are characterized by the predominance of oxalic acid (C2, ave, 20 ± 22 ng/g-snow) followed by succinic (C4, 7.2 ± 5.9 ng/g -snow), and malonic acids (C3, 3.3 ± 2.9 ng/g -snow) for all the snow layers. Lower C3/C4 ratios (0.46) suggest that organic aerosols are rather fresh without serious photochemical aging during the long-range transport over central Japan. The higher concentrations of the secondary species in dusty snow than non-dusty samples were mainly attributed to the heterogeneous reaction. The strong correlations of incloud oxidation products of isoprene, aromatic acids, and fatty acids suggest that condensation, oxidation, and photolysis are important reaction mechanisms for the formation of diacids. Chinese Loess (Kosa particles) and Mongolian Gobi desert's dust provided the surface area for polar organic compounds, traveled to several thousand kilometers in the lower troposphere, and snow metamorphism altered the chemical composition of diacids and related compounds. © 2020 Elsevier Ltd
关键词	Asian dust Diacids Incloud isoprene oxidation Snowpit Transboundary pollution
语种	英语
scopus关键词	Aromatic compounds; Atmospheric movements; Dust; Fatty acids; Oxalic acid; Photolysis; Snow; Atmospheric transport; Chemical compositions; Heterogeneous reactions; Long range transport; Low molecular weight; Molecular distribution; Oxidation products; Polar organic compounds; Organic pollutants; aromatic carboxylic acid; carbromal; dicarboxylic acid; fatty acid; isoprene; malonic acid; organic compound; oxalic acid; oxoacid; phthalic acid; pyruvic acid; snow; snow pit; succinic acid; unclassified drug; aerosol; atmospheric chemistry; atmospheric transport; chemical compound; concentration (composition); dust; long range transport; organic compound; seasonal variation; aerosol; aging; Article; Asian; atmospheric transport; chemical composition; concentration process; concentration ratio; continental ice; dust; Japan; loess; mineral dust; molecular weight; oxidation kinetics; photochemistry; photolysis; priority journal; reaction analysis; surface area; troposphere; winter; Chubu; Honshu; Japan; Mount Tateyama; Toyama [Chubu]
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/248850
作者单位	Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan; Chubu Institute for Advanced Studies, Chubu University, Kasugai, Japan; Department of Earth Science, Faculty of Science, Toyama University, Toyama, Japan; Institute of Science and Technology (IOST), Tribhuvan University, Nepal; Asian Research Center, Kathmandu, Nepal
推荐引用方式 GB/T 7714	Pokhrel A.,Kawamura K.,Tachibana E.,et al. Alpine snowpit profiles of polar organic compounds from Mt. Tateyama central Japan: Atmospheric transport of organic pollutants with Asian dust[J],2021,244.
APA	Pokhrel A.,Kawamura K.,Tachibana E.,Kunwar B.,&Aoki K..(2021).Alpine snowpit profiles of polar organic compounds from Mt. Tateyama central Japan: Atmospheric transport of organic pollutants with Asian dust.ATMOSPHERIC ENVIRONMENT,244.
MLA	Pokhrel A.,et al."Alpine snowpit profiles of polar organic compounds from Mt. Tateyama central Japan: Atmospheric transport of organic pollutants with Asian dust".ATMOSPHERIC ENVIRONMENT 244(2021).