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

Matsumoto, Kohei; Kawamura, Kimitaka; Uchida, Masao; Shibata, Yasuyuki; Yoneda, Minoru

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

Matsumoto, Kohei; Kawamura, Kimitaka; Uchida, Masao et al.

Geophysical Research Letters, 2001, 28(24), 4587-4590

Permalink : https://hdl.handle.net/2115/26139

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アクセス権	open access
URI	https://hdl.handle.net/2115/26139
タイトル	Compound specific radiocarbon and δ13C measurements of fatty acids in a continental aerosol sample
著者	Matsumoto, Kohei ; Kawamura, Kimitaka ; Uchida, Masao ; Shibata, Yasuyuki ; Yoneda, Minoru
著者名 Matsumoto, Kohei
e-Rad_Researcher 70201449 著者名 Kawamura, Kimitaka
著者名 Uchida, Masao
著者名 Shibata, Yasuyuki
著者名 Yoneda, Minoru
言語	英語
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	2001-12-15
出版者	American Geophysical Union
収録物名	Geophysical Research Letters
巻(号)	28(24)
ページ	4587-4590
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.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	An edited version of this paper was published by AGU. Copyright 2001, American Geophysical Union, GEOPHYSICAL RESEARCH LETTERS, 28.
PISSN	0094-8276