| Budget Amount *help |
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
A nuclear accident occurred in 2011 at the Fukushima Dai-ichi nuclear power plant (F1NPP) in northeast Japan. High levels of 137Cs have been reported in ambient aerosols from some areas of Fukushima after a decade of the accident. Based on the chemical analyses of atmospheric aerosols collected from Namie-cho in Fukushima, we found an increased positive relationship of 137Cs and organic tracers (i.e., arabitol, mannitol and trehalose) of fungal spore origin in the nighttime samples compared to daytime samples. We proposed in this study a soil-to-air emission of 137Cs via biological processes of fungi under favorable meteorological conditions. We emphasize that emissions of 137Cs due to fungal activities via spore emissions in nighttime are more important than emission of higher plant activities in both spring and autumn.
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