Anthropogenic radioactivity in aerosol: a review focusing on studies during the 2000s

DOI Web Site 被引用文献7件 参考文献83件
  • IGARASHI Yasuhito
    Atmospheric Environment and Applied Meteorology Research Department, Meteorological Research Institute

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タイトル別名
  • Anthropogenic Radioactivity in Aerosol
  • -A Review Focusing on Studies during the 2000s-

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抄録

Large-scale injection of huge amounts of any pollutant into the atmosphere has health and environmental impacts, but also provides an opportunity for understanding associated bio-geochemical cycles. Radiologically important, long-lived radionuclides emitted by atmospheric nuclear tests, such as 90Sr, 137Cs, and plutonium isotopes, are good examples. These radionuclides remain in the biosphere, although dilution and radioactive decay have mitigated their radiation impact, which is at present negligible compared with natural radiation. Nevertheless, the study of their redistribution over the Earth's surface can enhance understanding of various environmental processes. In this review, available up-to-date information on the source, transport, and deposition of these radionuclides in the atmosphere is collected and these aspects of radionuclides in various global regions are reviewed. In regions adjacent to arid or semi-arid lands, aeolian dust is likely the dominant source of these radionuclides, whereas in northern regions adjacent to contaminated boreal forests, forest fires are a more important source, especially of 137Cs in air. Understanding of the atmospheric processes responsible for the redistribution of these radionuclides can improve forecast models in various environmental research fields. Future tasks include continued long-term monitoring and data integration with global data consistency and data analysis with modern chemical transport models.

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  • 保健物理

    保健物理 44 (3), 313-323, 2009

    日本保健物理学会

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