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Development of gas microanalysis method in ice cores

Research Project

Project/Area Number 09558065
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Environmental dynamic analysis
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

HONDOH Takeo  Inst.of Low Temp.Sci., Hokkaido Univ., Prof., 低温科学研究所, 教授 (60109494)

Co-Investigator(Kenkyū-buntansha) MAE Shinji  Fac.of Eng., Hokkaido Univ., Prof., 工学研究科, 教授 (80022672)
SAHARA Masahiko  Inst.of Low Temp.Sci., Hokkaido Univ., COE Res., 低温科学研究所, COE研究員
HORI Akira  Inst.of Low Temp.Sci., Hokkaido Univ., Inst.Asst.Prof., 低温科学研究所, 助手 (60280856)
NARITA Hideki  Inst.of Low Temp.Sci., Hokkaido Univ., Assoc.Prof., 低温科学研究所, 助教授 (20001662)
清水 良祐  愛宕物産(株)ラマンシステム部, 部長
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥12,800,000 (Direct Cost: ¥12,800,000)
Fiscal Year 1998: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1997: ¥10,000,000 (Direct Cost: ¥10,000,000)
Keywordsice core / gas analysis / air bubble / clathrate hydrate / micro-Raman scattering / ラマン散乱 / 大気組成 / 気体分別
Research Abstract

Information of the atmospheric composition over the past 200,000 years in ice cores is stored in air bubbles and clathrate hydrates, of which sizes are as small as 1mm or less. In order to interpret information of the atmospheric composition precisely, high reliability is required in the analysis method. In this study, considering gas fractionations caused by the transition process of the air bubble to the clathrate air-hydrates, we aimed at development of the method to measure the local composition of N_2 and O_2.
We have applied a micro-Raman scattering method to the measurements, and we have established the method to correct the data for crystal anisotropy of the clathrate hydrates. As a result, we have successfully clarified the gas fractionation process in ice sheets. We proved that the micro-Raman scattering method is a highly reliable method to reveal the distribution of N_2/O_2 ratio in the individual clathrate hydrates. For the absolute precision of the gas compositions, however, the data should be compared with those obtained by the chemical analysis. We also developed a system of the quantitative analysis of gases using the gas chromatography I mass spectrometer.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] Tomoko Ikeda: "Crystal-orientation dependence of Raman spectra of natural air hydrate single crystal." The Journal of Physical Chemistry B. 101・32. 6180-6183 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hiroshi Fukazawa: "Raman spectra of translational lattice vibrations in polar ice." The Journal of Physical Chemistry B. 101・32. 6184-6187 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shinichiro Horikawa: "Dynamic behavior of diatomic guest molecules in clathrate hydrate structure II." The Journal of Physical Chemistry B. 101・32. 6290-6292 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Andrey N. Salamatin: "Post-nucleation conversion of an air bubble to clathrate air-hydrate crystal in ice." Journal of Crystal Growth. 193. 197-218 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hiroshi Fukazawa: "Acid ions at triple junction of Antarctic ice observed by Raman scattering." Geophysical Research Letters. 25・15. 2845-2848 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tomoko Ikeda: "Extreme fractionation of gases caused by formation of clathrate hydrates in Vostok Antarctic ice." Geophysical Research Letters. 26・1. 91-94 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tomoko Ikeda: "Crystal-orientation dependence of Raman spectra of natural air hydrate single crystal" J.Phys.Chem.B. 101-32. 6180-6183 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hiroshi Fukazawa: "Raman spectra of translational lattice vibrations in polar ice" J.Phys.Chem.B. 101-32. 6184-6187 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shinichiro Horikawa: "Dynamic behavior of diatomic guest molecules in clathrate hydrate structure II" J.Phys.Chem.B. 101-32. 6290-6292 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Andrey N.Salamatin: "Post-nucleation conversion of an air bubble to clathrate air-hydrate crystal in ice" J.Crystal Growth. 193. 197-218 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hiroshi Fukazawa: "Acid ions at triple junction of Antarctic ice observed by Raman scattering" Geophys.Res.Lett.25-15. 2845-2848 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tomoko Ikeda: "Extreme fractionation of gases caused by formation of clathrate hydrates in Vostok Antarctic ice" Geophys.Res.Lett.26-1. 91-94 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Tomoko Ikeda: "Crystal-orientation dependence of Raman spectra of natural air hydrate single crystal." The Journal of Physical Chemistry B. 101・32. 6180-6183 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Hiroshi Fukazawa: "Raman spectra of translational lattice vibrations in polar ice." The Journal of Physical Chemistry B. 101・32. 6184-6187 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Shinichiro Horikawa: "Dynamic behavior of diatomic huest molecules in clathrate hydrate structure II." The Journal of Physical Chemistry B. 101・32. 6290-6292 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Andrey N.Salamatin: "Post-nucleation conversion of an air bubble to clathrate air-hydrate crystal in ice." Journal of Crystal Growth. 193. 197-218 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Hiroshi Fukazawa: "Acid ions at triple junction of Antarctic ice observed by Raman scattering." Geophysical Research Letters. 25・15. 2845-2848 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Tomoko Ikeda: "Extreme fractionation of gases caused by formation of clathrate hydrates in Vostok Antarctic ice." Geophysical Research Letters. 26・1. 91-94 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] H.Itoh, K.Kawamura, T.Hondoh and S.Mae: "Molecular dynamics studies of self-interstitials in ice Ih" J.Chem.Phys.105. 2408-2413 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 内田務・本堂武夫: "ハイドレート中のガス含有量測定の現状" 月刊地球. 18. 679-684 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Ikeda, H.Fukazawa, T.Hondoh, V.Ya.Lipenkov, P.Duval and S.Mae: "Polarized Raman spectra of clathrate hydrate crystals in deep ice cores of Antarctica" Proc.2nd Int.Conf.Natural Gas Hydrates. 117-122 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Hondoh: "Clathrate hydrates in polar ice sheets" Proc.2nd Int.Conf.Natural Gas Hydrates. 131-138 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Ikeda, H.Fukazawa, S.Mae, T.Hondoh and C.C.Langway, Jr: "Crystal-Orientation Dependence of Raman Spectra of Natural Air Hydrate Single Crystal" J.Phys.Chem.B. 101. 6180-6183 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] J.Phys.Chem.B. 101. 6290-6292 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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