HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Institute of Low Temperature Science >
Peer-reviewed Journal Articles, etc >

Alpine snowpit profiles of polar organic compounds from Mt. Tateyama central Japan: Atmospheric transport of organic pollutants with Asian dust

This item is licensed under:Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

Files in This Item:
Atmospheric environment244_117923.pdf6.75 MBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Alpine snowpit profiles of polar organic compounds from Mt. Tateyama central Japan: Atmospheric transport of organic pollutants with Asian dust
Authors: Pokhrel, Ambarish Browse this author
Kawamura, Kimitaka Browse this author →KAKEN DB
Tachibana, Eri Browse this author
Kunwar, Bhagawati Browse this author
Aoki, Kazuma Browse this author
Keywords: Diacids
Incloud isoprene oxidation
Asian dust
Transboundary pollution
Issue Date: 1-Jan-2021
Publisher: Elsevier
Journal Title: Atmospheric environment
Volume: 244
Start Page: 117923
Publisher DOI: 10.1016/j.atmosenv.2020.117923
Abstract: 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.
Rights: ©2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 河村 公隆

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University