气候变化领域集成服务门户(CCPortal): Deposition and Dispersion of Radio-Cesium Released due to the Fukushima Nuclear Accident: 2. Sensitivity to Aerosol Microphysical Properties of Cs-Bearing Microparticles (CsMPs)

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DOI	10.1029/2020JD033460
	Deposition and Dispersion of Radio-Cesium Released due to the Fukushima Nuclear Accident: 2. Sensitivity to Aerosol Microphysical Properties of Cs-Bearing Microparticles (CsMPs)
	Kajino M.; Adachi K.; Igarashi Y.; Satou Y.; Sawada M.; Thomas Sekiyama T.; Zaizen Y.; Saya A.; Tsuruta H.; Moriguchi Y.
发表日期	2021
ISSN	2169897X
卷号	126 期号:1
英文摘要	The dispersion and deposition of radio-cesium (137Cs) carried by two types (type A and type B) of water-insoluble Cs-bearing solid microparticles (CsMPs) released due to the Fukushima nuclear accident were simulated for the first time. The presence of type B CsMPs (70–400 μm found in soil and 1–5 μm found in air), associated with the hydrogen explosion of Unit 1 in the afternoon of March 12, could partly explain the simulated underestimation of total deposition over land by assuming that 100% of the Cs carriers were water-soluble submicron particles (WSPs). Type A CsMPs (0.1–10 μm), released from Units 2 or 3 in the midnight between March 14 and 15, traveled over the Kanto Plain, the most populated plain in Japan. Differences in the size distribution of type A CsMPs altered the surface air concentration over Kanto substantially, by up to more than one order of magnitude. The major deposition mechanisms varied among dry, wet, and fog (and/or cloud) depositions depending on the size distribution and locations. The simulated activity fractions due to the CsMPs in the total deposition were compared to those observed in surface soil for the first time. The observations could be explained by the simulations for the locations under the influence of type B CsMPs. However, the simulations were substantially underestimated for the locations influenced by type A CsMPs. There could be more fractions of type A CsMPs emission in the source term and/or the simulated deposition rates of type A CsMPs were underestimated. © 2020. The Authors.
英文关键词	Aerosol properties; Chemical transport model; CsMPs; Deposition processes; Fukushima nuclear accident; Radiocesium
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185563
作者单位	Meteorological Research Institute (MRI), Japan Meteorological Agency (JMA), Tsukuba, Ibaraki, Japan; Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan; Institute of Radiation Emergency Medicine (IREM), Hirosaki University, Hirosaki, Aomori, Japan; Institute for Integrated Radiation and Nuclear Science (KURNS), Kyoto University, Kumatori, Osaka, Japan; College of Science, Ibaraki University, Mito, Ibaraki, Japan; Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency (JAEA), Tomioka, Fukushima, Japan; Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan; Remote Sensing Technology Center of Japan (RESTEC), Minato, Tokyo, Japan; Graduate School of Engineering, University of Tokyo, Bunkyo, Tokyo, Japan
推荐引用方式 GB/T 7714	Kajino M.,Adachi K.,Igarashi Y.,et al. Deposition and Dispersion of Radio-Cesium Released due to the Fukushima Nuclear Accident: 2. Sensitivity to Aerosol Microphysical Properties of Cs-Bearing Microparticles (CsMPs)[J],2021,126(1).
APA	Kajino M..,Adachi K..,Igarashi Y..,Satou Y..,Sawada M..,...&Moriguchi Y..(2021).Deposition and Dispersion of Radio-Cesium Released due to the Fukushima Nuclear Accident: 2. Sensitivity to Aerosol Microphysical Properties of Cs-Bearing Microparticles (CsMPs).Journal of Geophysical Research: Atmospheres,126(1).
MLA	Kajino M.,et al."Deposition and Dispersion of Radio-Cesium Released due to the Fukushima Nuclear Accident: 2. Sensitivity to Aerosol Microphysical Properties of Cs-Bearing Microparticles (CsMPs)".Journal of Geophysical Research: Atmospheres 126.1(2021).