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Volume 15, issue 2
Atmos. Chem. Phys., 15, 1029-1070, 2015
https://doi.org/10.5194/acp-15-1029-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Atmos. Chem. Phys., 15, 1029-1070, 2015
https://doi.org/10.5194/acp-15-1029-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 30 Jan 2015

Research article | 30 Jan 2015

Detailed source term estimation of the atmospheric release for the Fukushima Daiichi Nuclear Power Station accident by coupling simulations of an atmospheric dispersion model with an improved deposition scheme and oceanic dispersion model

G. Katata et al.
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Subject: Aerosols | Research Activity: Atmospheric Modelling | Altitude Range: Troposphere | Science Focus: Physics (physical properties and processes)
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Cited articles  
Abdul-Razzak, H., and Ghan, S. J.: A parameterization of aerosol activation, 2. Multiple aerosol types, J. Geophys. Res., 105, 6837–6844, https://doi.org/10.1029/1999JD901161, 2000.
Achim, P., Monfort, M., Le Petit, G., Gross, P., Douysset, G., Taffary, T., Blanchard, X., and Moulin, C.: Analysis of radionuclide releases from the Fukushima Dai-ichi Nuclear Power Plant Accident Part II, Pure Appl. Geophys., 171, 645–667, https://doi.org/10.1007/s00024-012-0578-1, 2014.
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., 3, 2554, https://doi.org/10.1038/srep02554, 2013.
Amano, H., Akiyama, M., Chunlei, B., Kawamura, T., Kishimoto, T., Kuroda, T., Muroi, T., Odaira, T., Ohta, Y., Takeda, K., Watanabe, Y., and Morimoto, T.: Radiation measurements in the Chiba Metropolitan Area and radiological aspects of fallout from the Fukushima Dai-ichi Nuclear Power Plants accident, J. Environ. Radioactiv., 111, 42–52, https://doi.org/10.1016/j.jenvrad.2011.10.019, 2012.
Andronache, C.: Estimated variability of below-cloud aerosol removal by rainfall for observed aerosol size distributions, Atmos. Chem. Phys., 3, 131–143, https://doi.org/10.5194/acp-3-131-2003, 2003.
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Short summary
The detailed atmospheric releases during the Fukushima Daiichi Nuclear Power Station accident were estimated using a reverse estimation method with atmospheric and oceanic dispersion models. The major releases occurred on the afternoon of 12 March, midnight of 14 March, the morning and night of 15 March, and the morning of 16 March in 2011. Several atmospheric dispersion models with our new source term reproduced the local and regional patterns of I-131 and Cs-137 deposition and air dose rate.
The detailed atmospheric releases during the Fukushima Daiichi Nuclear Power Station accident...
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