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1997 Fiscal Year Final Research Report Summary

CLARIFICATION OF HISTORY AND PREDICTION OF GLOBAL POLLUTION BY ULTRATRACE ELEMENTAL ANALYSIS OF ARCTIC ICE CORES-EFFECT OF NATURAL AND HUMAN ACTIVITIES

Research Project

Project/Area Number 08458147
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental dynamic analysis
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

KUDO Akira  RESEARCH REACTOR INSTITUTE,KYOTO UNIVERSITY,PROFESSOR, 原子炉実験所, 教授 (00281113)

Co-Investigator(Kenkyū-buntansha) TERASIMA Yasushi  FACULTY OF ENGINEERING,KYOTO UNIVERSITY,PROFESSOR, 工学部, 教授 (50019717)
SUGAHARA Masataka  FACULTY OF ENGINEERING,OSAKA SANGYO UNIVERSITY,PROFESSOR, 工学部, 教授 (60026119)
FUJIKAWA Yoko  RESEARCH REACTOR INSTITUTE,KYOTO UNIVERSITY,RESEARCH ASSOCIATE, 原子炉実験所, 助手 (90178145)
Project Period (FY) 1996 – 1997
KeywordsICE CORE / PLUTONIUM / CESIUM-137 / FALLOUT / ARCTIC
Research Abstract

Recent advancements in analytical technology made it possible for artificial radionuclides released from nuclear explosions to be detected in Arctic ice cores. We measured fission product ^<137>Cs, and unexpended fission material ^<239+240>Pu, from the Nagasaki A-bomb in 1945, in 10 ice cores collected on Agassiz ice cap, Ellesmere Island, Canada (80.7 ^ON degree). Assuming the radionuclides, excluding the amount fissioned from the explosion and deposited as local fallout, are deposited evenly throughout the northern hemisphere, expected percent that reached the Arctic was 67% for ^<137>Cs and 1.1% for ^<239+240>Pu. The results suggest that different global atmospheric transport mechanisms exist for various contaminants, including volcanic ash that induces global climate change.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] A.Kudo: "Global Transport Rates of ^<137>Cs and ^<239+240>PU Originating from the Nagasaki Abomb in 1945 as Determined from Analysis of Canadian Arctic Ice Cores" J.Environmental Radioactivity. (in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Kudo: "Deposition Rates of ^<239+240>Pu and a Fission Product ^<137>Cs at the Agassiz Ice Cap on Ellesmere Island, Canada-Possible Mechanisms of Global Distribution." Proc.AMAP International Conference on Environmental Radioactivity in the Arctic.110-112 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Kudo: "Fate of Nagasaki ^<239+240>Pu and Interaction of ^<239>Pu and ^<237>Np with Bentonite and Sulfate Reducing Bacteria." Proc.of International Workshop on Comparative Evaluation of Health Effects of Environmental Toxicants Derived from Advanced Technologies. (in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Kudo: "Behavior of Plutonium at the Surface and in a Geological Environment." Radio chimica Acta. (in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] A.Kudo: "Electrical Conductivity Measurements on Ice Cores from Canadian Arctic:An Analysis of Signal Variation within and between Ice Cores(in press)." Tellus. (in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kudo, A.et al.: "Global Transport Rates of ^<137>Cs and ^<239+240>Pu Originating from the Nagasaki A-bomb in 1945 as Determined from Analysis of Canadian Arctic Ice Cores" J.Environmental Radioactivity. (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kudo, A.et al.: "Deposition Rates of ^<239+240>Pu and a Fission Product ^<137>Cs at the Agassiz Ice Cap on Ellesmere Island, Canada-Possible Mechanisms of Global Distribution." Proc.AMAP International Conference on Environmental Radioactivity in the Arctic.110-112 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kudo, A.et al.: "Fate of Nagasaki ^<239+240>Pu and Interaction of ^<239>Pu and ^<237>Np with Bentonite and Sulfate Reducing Bacteria" Proc.of International Workshop on Comparative Evaluation of Health Effects of Environmental Toxicants Derived from Advanced Technologies. (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kudo, A.: "Behavior of Plutonium at the Surface and in a Geological Environment" Radiochimica Acta. (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kudo, A.et al.: "Electrical Conductivity Measurements on Ice Cores from Canadian Arctic : An Analysis of Signal Variation within and between Ice Cores" Tellus. (in press). (1998)

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

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Published: 1999-03-16  

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