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Dicarboxylic acids in the arctic aerosols and snowpacks collected during ALERT2000

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タイトル: Dicarboxylic acids in the arctic aerosols and snowpacks collected during ALERT2000
著者: Narukawa, M. 著作を一覧する
Kawamura, K. 著作を一覧する
Li, S. -M. 著作を一覧する
Bottenheim, W. 著作を一覧する
キーワード: oxalic acid
malonic acid
succinic acid
photooxidation
bromine chemistry
発行日: 2002年 5月
出版者: Elsevier
誌名: Atmospheric Environment
巻: 36
号: 15-16
開始ページ: 2491
終了ページ: 2499
出版社 DOI: 10.1016/S1352-2310(02)00126-7
抄録: Saturated (C2-C11) and unsaturated (C4-C5, C8) dicarboxylic acids were measured in arctic aerosol and surface snowpack samples collected during dark winter (February) and light spring (April-May) using a gas chromatography and gas chromatography/mass spectrometry. Their molecular distributions were characterized by a predominance of oxalic acid (C2), except for few spring snowpack samples that showed the predominance of succinic acid (C4). Concentrations of short chain saturated diacids (C3-C5) and 4-ketopimelic acid in the aerosol samples increased by a factor of ~5 from winter to spring. In contrast, those of saturated C6-C11 diacids and unsaturated (maleic, methylmaleic and phthalic) acids decreased by a factor of ~4 from winter to spring aerosol samples. Snowpack samples also showed a similar trend. These results of the aerosol samples suggested that the diacids are largely produced in spring by photochemical oxidation of hydrocarbons and other precursors that are transported long distances from the mid- and low-latitudes to the Arctic, but the production of oxalic acid is in part counteracted by photo-induced degradation possibly associated with bromine chemistry.
Relation (URI): http://www.sciencedirect.com/science/journal/13522310
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/10511
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 河村 公隆

 

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