Title: | A model intercomparison of atmospheric Cs-137 concentrations from the Fukushima Daiichi Nuclear Power Plant accident, phase III : Simulation with an identical source term and meteorological field at 1-km resolution |
Authors: | Sato, Yousuke Browse this author →KAKEN DB |
Sekiyama, Tsuyoshi Thomas Browse this author |
Fang, Sheng Browse this author |
Kajino, Mizuo Browse this author |
Querel, Arnaud Browse this author |
Quelo, Denis Browse this author |
Kondo, Hiroaki Browse this author |
Terada, Hiroaki Browse this author |
Kadowaki, Masanao Browse this author |
Takigawa, Masayuki Browse this author |
Morino, Yu Browse this author |
Uchida, Junya Browse this author |
Goto, Daisuke Browse this author |
Yamazawa, Hiromi Browse this author |
Keywords: | Model intercomparison project for atmospheric(137)Cs |
Atmospheric dispersion model |
Radionuclide |
Issue Date: | Oct-2020 |
Publisher: | Elsevier |
Journal Title: | Atmospheric Environment-X |
Volume: | 7 |
Start Page: | 100086 |
Publisher DOI: | 10.1016/j.aeaoa.2020.100086 |
Abstract: | The third model intercomparison project (MIP) for investigating the atmospheric behavior of atmospheric caesium-137 (Cs-137) emitted from Fukushima Daiichi Nuclear Power Plant (FDNPP) (3rd FDNPP-MIP), Japan, in March 2011, was conducted. A finer horizontal grid spacing (1 km) was used than in the previous FDNPP-MIP (2nd FDNPP-MIP, Sato et al., 2018; 3 km) to evaluate the models' performance for high-concentration events measured near FDNPP. Nine of the models used in the 2nd FDNPP-MIP were also used in the 3rd FDNPP-MIP, and all models used identical source terms and meteorological fields. The performance of the models was evaluated through a comparison with observational data. Our analyses indicated that most of the observed high atmospheric Cs-137 concentrations (plumes) were reasonably well simulated by the models, and the good performance of some models improved the performance of the multimodel, highlighting the advantage of using a multimodel ensemble. The analyses also confirmed that the use of a finer grid resolution resulted in the meteorological field near FDNPP being better reproduced in the 3rd FDNPP-MIP, and the performance of the models was better than that of the 2nd FDNPP MIP. The good representation of the wind field resulted in the reasonable simulation of the narrow distribution of high deposition amount to the northwest of FDNPP and the reduction of the overestimation in deposition amount over the area to the south of FDNPP compared to the 2nd FDNPP MIP. In contrast, the performance of the models in simulating plumes observed over the Nakadori area, the northern part of Gunma, and the Tokyo Metropolitan Area (TMA) was slightly worse than in the 2nd FDNPP-MIP. |
Rights: | https://creativecommons.org/licenses/by/4.0/ |
Type: | article |
URI: | http://hdl.handle.net/2115/79678 |
Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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