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2001 Fiscal Year Final Research Report Summary

AMS radiocarbon measurements of individual organic molecules : making preparative capillary GC system and its application to geochemical samples

Research Project

Project/Area Number 10354009
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 地球化学
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

KAWAMURA Kimitaka  Hokkaido Univ., Inst. of Low Temp. Sci., Professor, 低温科学研究所, 教授 (70201449)

Co-Investigator(Kenkyū-buntansha) NAKAMURA Toshio  Nagoya Univ., Associate Professor, 年代測定試料研究センター, 助教授 (10135387)
SHIBATA Yasuyuki  National Inst. for Environ, Studies, Director, 科学環境研究領域, 室長 (80154251)
NAKATUSKA Takeshi  Hokkaido Univ., Inst. of Low Temp. Sci., Associate Professor, 低温科学研究所, 助教授 (60242880)
MATSUMOTO Kohei  Hokkaido Univ., Inst. of Low Temp. Sci., Post Doctorial Fellow, 低温科学研究所, 学振特別研究院
YAMAGAMI Takashi  Yokogawa Analytical Systems Inc., Manager, アプリケーション開発部・技術第1課, 係長(研究職)
Project Period (FY) 1998 – 2001
KeywordsRadiocarbon / AMS / Chronology / Organic carbon age / Biomakers / Preparative GC / Aerosols / Geochemical samaples
Research Abstract

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 marineorganisms. On the other hand, C24-C26 fatty acids that arecharacteristic to terrestrial plant waxes showed 14C ages of 5860 (EA200) years. This suggests that some portion of higher molecular weight fatty acids have been stored in geocnemical reservoirs such as soils at least for hundreds to thousands of years arid then emitted to the atmosphere. These aged fatty acids could be in part transported long distances from the Asian continent through the atmosphere.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 田中伸幸 他: "東京郊外で同時に採取したエアロゾルおよび降水試料中の中性脂質成分の経時変化"地球化学. 35. 169-182 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Saito et al.: "Stable carbon isotopic compositionS of light hydrocarbons over the western North Pacific and implication for their photochemical ages"Journal of Geophysical Research. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Matsumoto et al.: "Compound specific radiocarbon and δ^<13> measurements of fatty acids in a continental aerosol sample"Geophysical Research Letters. 28. 4587-4590 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Uchida et al.: "Compound-specific radiocarbon ages of fatty acids from bathyal sediments in the western North Pacific"Radio carbon. 43. 949-956 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Narukawa et al.: "Dicarboxylic acids in the arctic aerosols and snowpacks collected during ALERT2000"Atmospheric Environment. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Kawamura et al.: "Four year observation of terrestrial lipid class compounds in marine aerosols from the western North Pacific"Global Biogeochemical Cycles. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N. TanaKa, K. Kawamura: "Temporal changes in the composition and concentration of neutral lipids in aerosol and rain samples simultaneously collected in suburban Tokyo"Chikyukagaku. 35. 169-182 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Saito, U. Tsunogai, K. Kawamura, T. Nakatsuka, N. Yoshida: "Stable carbon isotopic compositions of light hydrocarbons; over the western North Pacific and implication for their photochemical ages"Journal of Geophysical Research. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Matsumoto, K. Kawamura, M. Uchida, Y. Shibata, M. Yoneda: "Compound specific radiocarbon and δ^<13>C measurements of fatty acids in a continental aerosol sample"Gophysical Research Letters. 28. 4587-4590 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Uchida, Y. Shibata, K. Kawamura, Y. Kumamoto, M. Yoneda, K, Ohkashi, N. Harada, M. Hirota, H. Mukai, A. Tanaka, M. Kusakabe, M. Morita: "Compound-specific radiocarbon ages of fatty acids from bathyal sediments in the western North Pacific"Radiocarbon. 43. 949-956 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Narukawa, K. Kawamiura, S.-M. Li, J. W. Bottenheim: "Dicarboxylic acids in the arctic aerosols and snowpacks collected during ALERT2000"Atmospheric Environment. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Kawamura, Y. Ishimura, K. Yamazaki: "Four year observation of terrestrial lipid class compounds in marine aerosols from the western North Pacific"Global Biochemical Cycles. (in press).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2003-09-17  

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