Water-Soluble dicarboxylic acids, ketoacids and dicarbonyls in the atmospheric aerosols over the southern ocean and western pacific ocean

Wang Haobo; Kawamura Kimitaka; 河村 公隆; Yamazaki Koji

タイトル	en Water-Soluble dicarboxylic acids, ketoacids and dicarbonyls in the atmospheric aerosols over the southern ocean and western pacific ocean
作成者	en Wang, Haobo en Kawamura, Kimitaka ja 河村, 公隆 NRID 1000070201449 en Yamazaki, Koji NRID 1000070270791
アクセス権	open access
権利情報	en The original publication is available at www.springerlink.com
主題	Other en global background Other en latitudinal distributions Other en photochemical reactions Other en remote marine aerosols Other en sources Other en water-soluble organics NDC 452
内容注記	Abstract en Water-soluble dicarboxylic acids (DCAs), ketoacids, and α-dicarbonyls in the marine aerosol samples collected over the Southern Ocean and western Pacific Ocean were determined. Oxalic acid was the most abundant species, followed by malonic acid and then succinic acid. It is suggested that aerosol concentrations of the organics over the Southern Ocean in this work represent their global background levels. Over the Southern Ocean, total concentrations of DCAs ranged from 2.9 to 7.2 ng m(−3) (average: 4.5 ng m(−3)), ketoacids from 0.14 to 0.40 ng m(−3) (av.: 0.28 ng m(−3)), and dicarbonyls from 0.06 to 0.29 ng m(−3) (av.: 0.11 ng m(−3)). Over the western Pacific, total concentrations of DCAs ranged from 1.7 to 170 ng m(−3) (av.: 60 ng m(−3)), ketoacids from 0.08 to 5.3 ng m(−3) (av.: 1.8 ng m(−3)), and dicarbonyls from 0.03 to 4.6 ng m(−3) (av.: 0.95 ng m(−3)). DCAs over the western Pacific have constituted a large fraction of organic aerosols with a mean DCAs-C/TC (total carbon) of 7.0% (range: 0.59–14%). Such a high value was in contrast to the low DCAs-C/TC (av.: 1.8%; range: 0.89–4.0%) for the Southern Ocean aerosols. Based on the relative abundances and latitudinal distributions of these organics, we propose that long-range atmospheric transport is more important over the western Pacific Ocean, in contrast, in situ photochemical production is more significant over the Southern Ocean although absolute concentrations of the organics are much lower.
出版者	en Springer
日付	Issued2006-01
言語	eng
資源タイプ	journal article
出版タイプ	AM
資源識別子	HDL http://hdl.handle.net/2115/5855
関連	isVersionOf DOI https://doi.org/10.1007/s10874-006-1479-4
収録誌情報	PISSN 0167-7764 en Journal of Atmospheric Chemistry 巻53 号1 開始ページ43 終了ページ61
ファイル	fulltext JAC53-1.pdf 651.48 KB (application/pdf) Issued2006-01
コンテンツ更新日時	2023-07-26