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2003 Fiscal Year Final Research Report Summary

Measurement of the Trends, Behaviors, and Emissions of Trace Gases in the Atmosphere, and its Application to the Analysis in Atmospheric Sciences.

Research Project

Project/Area Number 13308028
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental dynamic analysis
Research InstitutionThe University of Tokyo

Principal Investigator

MAKIDE Yoshihiro  The University of Tokyo, Radioisotope Center, Professor, アイソトープ総合センター, 教授 (40011746)

Project Period (FY) 2001 – 2003
KeywordsAtmospheric Trace Gases / Global Warming / Kyoto Protocol for Prevention of Global Warming / Measurement of Atmospheric Concentration / Halocarbons / Carbon Tetrafluoride (CF4) / GC / MS Analyzer / Krypton(Kr)
Research Abstract

Distribution and trend of atmospheric carbon tetrafluoride (CF4) concentration by its precise and accurate measurement adopting atmospheric stable Krypton(Kr) as an internal standard was mainly developed. While CF4 is the strongest global warming gas, the measurement of its atmospheric concentration reported so far contains much larger uncertainties than the annual increment or the distribution gradient due to the worse trapping efficiency or unstable collection factor during the preconcentration process prior to GC/MS analysis because of its close properties to the major components of the air. An efficient and reproducible preconcentration method was developed and combined with the newly adopted atmospheric Kr as an internal standard because of their close physical properties and similar behaviors during the preconcentration and the GC/MS measurement. Since Kr exists uniformly and constantly in the global atmosphere with no variation or trend, extraordinarily improvement of the precision of CF4 determination (from several per cents to less than one per cent) was attained by normalizing the CF4 peak with a Kr isotope peak in the GC/MS measurement. The sample volume necessary was also extremely reduced. The precise and accurate distributions and trends of CF4 in the troposphere and stratosphere were obtained from the samples newly collected and those stored in our laboratory for more than 20 years. During our attempt of the precise determination of trace gases in the atmosphere by using atmospheric Kr as the internal standard, we noticed that the atmospheric Kr concentration of 1.14±0.01 ppmv which had been quoted through half a century was different from the observation. The Kr concentration we obtained with three step concentration followed by precise GC/MS measurement was 1.099±0.004 ppmv, about 4% lower than the currently accepted value.

  • Research Products

    (11 results)

All 2004 2003 2002 2001

All Journal Article (11 results)

  • [Journal Article] Precise Determination of the Atmospheric CF4 Concentration by Using Natural Kr in the Atmosphere as an Internal Reference in the Preconcentration / GC / MS Analysis.2004

    • Author(s)
      N.Aoki, Y.Makide
    • Journal Title

      Chemistry Letters 33

      Pages: 1634-1635

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Precise Determination of the Atmospheric CF_4 Concentration by Using Natural Kr in the Atmosphere as an Internal Reference in the Preconcentration/GC/MS Analysis.2004

    • Author(s)
      N.Aoki, Y.Makide
    • Journal Title

      Chemistry Letters 33

      Pages: 1634-1635

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Estimation of the Emission of Volatile Organic Compounds (VOCs) in Central Tokyo by the Dynamic Analysis of Their Temporally Increasing Atmospheric Concentrations in Calm Weather Afternoon Conditions.2003

    • Author(s)
      T.Miyoshi, Y.Makide
    • Journal Title

      Chemistry Letters 32

      Pages: 562-563

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The Stratospheric Distributions of Long-lived Atmospheric Halocarbons over Kiruna and Sanriku Observed by Balloon-borne Cryogenic Sampling and Subsequent GC Analyses.2003

    • Author(s)
      S.Shirai, Y.Makide et al.
    • Journal Title

      宇宙科学研究所報告 45

      Pages: 75-82

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Estimation of the Emission of Volatile Organic Compounds(VOCs) in Central Tokyo by the Dynamic Analysis of Their Temporally Increasing Atmospheric Concentrations in Calm Weather Afternoon Conditions.2003

    • Author(s)
      T.Miyoshi, Y.Makide
    • Journal Title

      Chemistry Letters 32

      Pages: 562-563

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] The Stratospheric Distributions of Long-lived Atmospheric Halocarbons over Kiruna and Sanriku Observed by Balloon-borne Cryogenic Sampling and Subsequent GC Analyses.2003

    • Author(s)
      S.Shirai, Y.Makide et al.
    • Journal Title

      Report ISAS 45

      Pages: 75-82

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Variations of Stratospheric Trace Gases Measured Using a Balloon-borne Cryogenic Sampler.2002

    • Author(s)
      T.Nakazawa, Y.Makide et al.
    • Journal Title

      Adv.Space Res. 30

      Pages: 1349-1357

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Estimation of the Emission of Volatile Organic Compounds (VOCs) in Tokyo from Their Observed Increments of the Atmospheric Averaged Concentrations above the Background Concentrations.2001

    • Author(s)
      T.Miyoshi, Y.Makide
    • Journal Title

      Chemistry Letters 30

      Pages: 1260-1261

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 東京都心部における揮発性有機化合物(VOCs)の大気中濃度変動の測定および発生源との相関に基づく挙動の解析.2001

    • Author(s)
      三好猛雄, 巻出義紘
    • Journal Title

      日本化学会誌 2001

      Pages: 223-237

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Estimation of the Emission of Volatile Organic Compounds(VOCs) in Tokyo from Their Observed Increments of the Atmospheric Averaged Concentrations above the Background Concentrations.2001

    • Author(s)
      T.Miyoshi, Y.Makide
    • Journal Title

      Chemistry Letters 30

      Pages: 1260-1261

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Measurement of the Variation of Atmospheric Concentrations of Volatile Organic Compounds(VOCs) in the Central Tokyo and Analysis of their Behaviors in Correlation with Sources (in Japanese).2001

    • Author(s)
      T.Miyoshi, Y.Makide
    • Journal Title

      Nippon Kagakukai-shi 2001

      Pages: 223-237

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

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Published: 2006-07-11  

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