Springtime variations of organic and inorganic constituents in submicron aerosols (PM1.0) from Cape Hedo, Okinawa

Kunwar, Bhagawati; Torii, K.; Zhu, Chunmao; Fu, Pingqing; Kawamura, Kimitaka

Springtime variations of organic and inorganic constituents in submicron aerosols (PM1.0) from Cape Hedo, Okinawa

Kunwar, Bhagawati; Torii, K.; Zhu, Chunmao et al.

Atmospheric environment, 2015, 130, 84-94

Permalink : https://hdl.handle.net/2115/67103

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アクセス権	open access
URI	https://hdl.handle.net/2115/67103
タイトル	Springtime variations of organic and inorganic constituents in submicron aerosols (PM1.0) from Cape Hedo, Okinawa
著者	Kunwar, Bhagawati ; Torii, K. ; Zhu, Chunmao ; Fu, Pingqing ; Kawamura, Kimitaka
著者名 Kunwar, Bhagawati
著者名 Torii, K.
著者名 Zhu, Chunmao
著者名 Fu, Pingqing
e-Rad_Researcher 70201449 著者名 Kawamura, Kimitaka
言語	英語
キーワード	Submicron aerosols
	Diacids and related compounds
	Organic nitrogen
	Okinawa
	Atmospheric aging
発行日	2015-09-05
出版者	Elsevier
収録物名	Atmospheric environment
巻(号)	130
ページ	84-94
抄録	During the spring season with enhanced Asian outflow, we collected submicron aerosol (PM1.0) samples at Cape Hedo, Okinawa Island in the western North Pacific Rim. We analyzed the filter samples for diacids, oxoacids, pyruvic acid, alpha-dicarbonyls and fatty acids to better understand the sources and atmospheric processes in the outflow regions of Asian pollutants. Molecular distributions of diacids show a predominance of oxalic acid (C-2) followed by malonic (C-3) and succinic (C-4) acids. Total diacids strongly correlated with secondary source tracers such as SO42- (r = 0.87), NH4+ (0.90) and methanesulfonate (MSA(-)) (0.84), suggesting that diacids are secondarily formed from their precursor compounds. We also found good correlations among C-2, organic carbon (OC) and elemental carbon (EC) in the Okinawa aerosols, suggesting that diacids are mainly derived from anthropogenic sources. However, a weak correlation of diacids with levoglucosan, a biomass burning tracer, suggests that biomass buring is not the main source of diacids, rather diacids are secondarily formed by photochemical oxidation of organic precursors derived from fossil fuel combustion. We found a strong correlation (r = 0.98) between inorganic nitrogen (NO3-N + NH4-N) and total nitrogen (TN), to which organic nitrogen (ON) contributed 23%. Fatty acids were characterized by even carbon number predominance, suggesting that they are derived from biogenic sources. The higher abundances of short chain fatty acids (<C-20) than long chain fatty acids (>C-20) further suggest that fatty acids are largely derived from marine phytoplankton during spring bloom. (C) 2015 Elsevier Ltd. All rights reserved.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	©2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	1352-2310
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.atmosenv.2015.09.002