Articles | Volume 22, issue 1
https://doi.org/10.5194/acp-22-675-2022
https://doi.org/10.5194/acp-22-675-2022
Research article
 | 
17 Jan 2022
Research article |  | 17 Jan 2022

Eight-year variations in atmospheric radiocesium in Fukushima city

Akira Watanabe, Mizuo Kajino, Kazuhiko Ninomiya, Yoshitaka Nagahashi, and Atsushi Shinohara

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Cited articles

Adachi, K., Kajino, M., Zaizen, Y., and Igarashi, Y.: Emission of spherical cesium-bearing particles from an early stage of the Fukushima nuclear accident, Sci. Rep.-UK, 3, 12–15, https://doi.org/10.1038/srep02554, 2013. 
Ager, A. A., Lasko, R., Myroniuk, V., Zibtsev, S., Day, M. A., Usenia, U., Bogomolov, V., Kovalets, I., and Evers, C. R.: The wildfire problem in areas contaminated by the Chernobyl disaster, Sci. Total Environ., 696, 133954, https://doi.org/10.1016/j.scitotenv.2019.133954, 2019. 
Doi, T., Masumoto, K., Toyoda, A., Tanaka, A., Shibata, Y., and Hirose, K.: Anthropogenic radionuclides in the atmosphere observed at Tsukuba: characteristics of the radionuclides derived from Fukushima, J. Environ. Radioact., 122, 55–62, https://doi.org/10.1016/j.jenvrad.2013.02.001, 2013. 
Igarashi, Y., Kita, K., Maki, T., Kinase, T., Hayashi, N., Hosaka, K., Adachi, K., Kajino, M., Ishizuka, M., Sekiyama, T. T., Zaizen, Y., Takenaka, C., Ninomiya, K., Okochi, H., and Sorimachi, A.: Fungal spore involvement in the resuspension of radiocaesium in summer, Sci. Rep.-UK, 9, 1954, https://doi.org/10.1038/s41598-018-37698-x, 2019a. 
Igarashi, Y., Kogure, T., Kurihara, Y., Miura, H., Okumura, T., Satou, Y., Takahashi, Y. and Yamaguchi, N.: A review of Cs-bearing microparticles in the environment emitted by the Fukushima Dai-ichi Nuclear Power Plant accident, J. Environ. Radioact., 205–206, 101–118, https://doi.org/10.1016/j.jenvrad.2019.04.011, 2019b. 
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Short summary
This study summarizes continuous measurements of surface air concentrations and deposition of radiocesium in Fukushima city over 8 years after the Fukushima nuclear accident. The concentration in the city was high in winter and low in summer (inverse of the forest area). The decreasing trends were much faster in the earlier stage, probably because dissolved cesium discharged faster from the local environment. Biotite might play a key role in circulation of particulate cesium in Fukushima city.
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