title: Use of a size-resolved 1-D resuspension scheme to evaluate resuspended radioactive material associated with mineral dust particles from the ground surface.
abstract: A size-resolved, one-dimensional resuspension scheme for soil particles from the ground surface is proposed to evaluate the concentration of radioactivity in the atmosphere due to the secondary emission of radioactive material. The particle size distributions of radioactive particles at a sampling point were measured and compared with the results evaluated by the scheme using four different soil textures: sand, loamy sand, sandy loam, and silty loam. For sandy loam and silty loam, the results were in good agreement with the size-resolved atmospheric radioactivity concentrations observed at a school ground in Tsushima District, Namie Town, Fukushima, which was heavily contaminated after the Fukushima Dai-ichi Nuclear Power Plant accident in March 2011. Though various assumptions were incorporated into both the scheme and evaluation conditions, this study shows that the proposed scheme can be applied to evaluate secondary emissions caused by aeolian resuspension of radioactive materials associated with mineral dust particles from the ground surface. The results underscore the importance of taking soil texture into account when evaluating the concentrations of resuspended, size-resolved atmospheric radioactivity.
authors.affiliation: Kagawa University, 2217-20 Hayashi-cho, Takamatsu, Kagawa, 761-0396, Japan. Electronic address: ishizuka@eng.kagawa-u.ac.jp.
authors.forename: Masahide
authors.initials: M
authors.lastname: Ishizuka
authors.affiliation: Japan Meteorological Business Support Center, 3-17 Kanda-Nishikicho, Chiyoda-ku, Tokyo, 101-0054, Japan. Electronic address: mikami@jmbsc.or.jp.
authors.forename: Masao
authors.initials: M
authors.lastname: Mikami
authors.affiliation: Atmospheric Environment Division, Japan Meteorological Agency, 1-3-4 Otemachi, Chiyoda-ku, Tokyo, 100-8122, Japan. Electronic address: taichu_tanaka@met.kishou.go.jp.
authors.forename: Taichu Y
authors.initials: TY
authors.lastname: Tanaka
authors.affiliation: Meteorological Research Institute, Japan Meteorological Agency, 1-1 Nagamine, Tsukuba, Ibaraki, 305-0052, Japan. Electronic address: igarash@mri-jma.go.jp.
authors.forename: Yasuhito
authors.initials: Y
authors.lastname: Igarashi
authors.affiliation: Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki, 310-8512, Japan. Electronic address: kazuyuki.kita.iu@vc.ibaraki.ac.jp.
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Kita
authors.affiliation: RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan. Electronic address: yamadayu@riken.jp.
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Yamada
authors.affiliation: Tokyo Institute of Technology, G1-17, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8502, Japan. Electronic address: yoshida.n.aa@m.titech.ac.jp.
authors.forename: Naohiro
authors.initials: N
authors.lastname: Yoshida
authors.affiliation: Tokyo Institute of Technology, G1-17, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8502, Japan. Electronic address: toyoda.s.aa@m.titech.ac.jp.
authors.forename: Sakae
authors.initials: S
authors.lastname: Toyoda
authors.affiliation: University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan. Electronic address: yukihiko@ied.tsukuba.ac.jp.
authors.forename: Yukihiko
authors.initials: Y
authors.lastname: Satou
authors.affiliation: Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki, 310-8512, Japan. Electronic address: tacchan.antarctica@gmail.com.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Kinase
authors.affiliation: Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan. Electronic address: ninokazu@chem.sci.osaka-u.ac.jp.
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Ninomiya
authors.affiliation: Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan. Electronic address: shino@chem.sci.osaka-u.ac.jp.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Shinohara
mesh_terms: D002588:Cesium Radioisotopes / Q000032:analysis*; D004391:Dust; D062406:Fukushima Nuclear Accident; D007564:Japan; D008903:Minerals; D008962:Models, Theoretical; D010316:Particle Size; D011834:Radiation Monitoring; D012987:Soil / Q000737:chemistry*; D012990:Soil Pollutants, Radioactive / Q000032:analysis*
chemical_list: D002588:Cesium Radioisotopes; D004391:Dust; D008903:Minerals; D012987:Soil; D012990:Soil Pollutants, Radioactive
keywords: Dust emission; Fukushima Nuclear Power Plant Accident; Radioactive aerosol; Secondary emission; Size-resolved resuspension scheme