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Compound specific radiocarbon and δ13C measurements of fatty acids in a continental aerosol sample

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タイトル: Compound specific radiocarbon and δ13C measurements of fatty acids in a continental aerosol sample
著者: Matsumoto, Kohei 著作を一覧する
Kawamura, Kimitaka 著作を一覧する
Uchida, Masao 著作を一覧する
Shibata, Yasuyuki 著作を一覧する
Yoneda, Minoru 著作を一覧する
キーワード: 0305 Atmospheric composition and structure
Aerosols and particles (0345, 4801) 0330 Geochemical cycles 1055 Geochemistry (new field, replaces rock chemistry)
Organic geochemistry 4860 Oceanography: biological and chemical
Radioactivity and radioisotopes
発行日: 2001年12月15日
出版者: American Geophysical Union
誌名: Geophysical Research Letters
巻: 28
号: 24
開始ページ: 4587
終了ページ: 4590
抄録: Compound-specific radiocarbon analysis of individual fatty acids was conducted for a semi-urban aerosol sample using a preparative capillary gas chromatography (PCGC) system and an accelerator mass spectrometry (AMS). The aerosol fatty acids (C16 to C34) showed a typical bimodal distribution with two maxima at C16 and C26. Their carbon isotopic compositions ranged from -30.3 ‰ (C26) to -23.3 ‰ (C18), suggesting that they are derived from terrestrial higher plants and marine sources. Radiocarbon measurements of C16-C22 fatty acids showed modern 14C ages, suggesting that the acids are emitted from living higher plants and possibly from marine organisms. On the other hand, C24-C26 fatty acids that are characteristic to terrestrial plant waxes showed 14C ages of 5860 (±200) years. This suggests that some portion of higher molecular weight fatty acids have been stored in geochemical reservoirs such as soils at least for hundreds to thousands of years and then emitted to the atmosphere. These aged fatty acids could be in part transported long distances from the Asian continent through the atmosphere.
Rights: An edited version of this paper was published by AGU. Copyright 2001, American Geophysical Union, GEOPHYSICAL RESEARCH LETTERS, 28.
資料タイプ: article (author version)
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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