干旱区生态环境知识资源中心(Arid): Alpine snowpit profiles of polar organic compounds from Mt. Tateyama central Japan: Atmospheric transport of organic pollutants with Asian dust

Arid

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, Ambarish; Kawamura, Kimitaka; Tachibana, Eri; Kunwar, Bhagawati; Aoki, Kazuma
通讯作者	Kawamura, K
来源期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
EISSN	1873-2844
出版年	2021
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 degrees N, 137.60 degrees 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, omega-oxoacids, pyruvic acid, and alpha-dicarbonyls were measured for this snowpit sequence. Higher concentrations of short-chain diacids (C-2-C-5) are observed in dusty snow than nondusty snow samples. Longer chain diacids (C-7-C-12) 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 (C-2, ave, 20 +/- 22 ng/g-snow) followed by succinic (C-4, 7.2 +/- 5.9 ng/g-snow), and malonic acids (C-3, 3.3 +/- 2.9 ng/g-snow) for all the snow layers. Lower C-3/C-4 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.
英文关键词	Diacids Incloud isoprene oxidation Snowpit Asian dust Transboundary pollution
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000591735200005
WOS关键词	SOLUBLE DICARBOXYLIC-ACIDS ; ALPHA-DICARBONYLS ; OXOCARBOXYLIC ACIDS ; ICE CORE ; KETOCARBOXYLIC ACIDS ; AEROSOL FORMATION ; MARINE AEROSOLS ; FATTY-ACIDS ; MOLECULAR-DISTRIBUTIONS ; SPATIAL DISTRIBUTIONS
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328016
作者单位	[Pokhrel, Ambarish; Kawamura, Kimitaka; Tachibana, Eri; Kunwar, Bhagawati] Hokkaido Univ, Inst Low Temp Sci, Sapporo, Hokkaido, Japan; [Kunwar, Bhagawati] Chubu Univ, Chubu Inst Adv Studies, Kasugai, Aichi, Japan; [Aoki, Kazuma] Toyama Univ, Fac Sci, Dept Earth Sci, Toyama, Japan; [Pokhrel, Ambarish] Tribhuvan Univ, Inst Sci & Technol Iost, Kirtipur, Nepal; [Pokhrel, Ambarish] Asian Res Ctr, Kathmandu, Nepal
推荐引用方式 GB/T 7714	Pokhrel, Ambarish,Kawamura, Kimitaka,Tachibana, Eri,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, Ambarish,Kawamura, Kimitaka,Tachibana, Eri,Kunwar, Bhagawati,&Aoki, Kazuma.(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, Ambarish,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).