title: Variation of radiocesium concentrations in cedar pollen in the Okutama area since the Fukushima Daiichi Nuclear Power Plant accident.
abstract: Due to releases of radionuclides in the Fukushima Daiichi Nuclear Power Plant accident, radiocesium ((134)Cs and (137)Cs) has been incorporated into large varieties of plant species and soil types. There is a possibility that radiocesium taken into plants is being diffused by pollen. Radiocesium concentrations in cedar pollen have been measured in Ome City, located in the Okutama area of metropolitan Tokyo, for the past 3 y. In this research, the variation of radiocesium concentrations was analysed by comparing data from 2011 to 2014. Air dose rates at 1 m above the ground surface in Ome City from 2011 to 2014 showed no significant difference. Concentration of (137)Cs contained in the cedar pollen in 2012 was about half that in 2011. Between 2012 and 2014, the concentration decreased by approximately one-fifth, which was similar to the result of a press release distributed by the Japanese Ministry of Agriculture, Forestry and Fisheries.
authors.affiliation: Department of Radiological Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Tsuruoka
authors.affiliation: Department of Radiological Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Inoue
authors.affiliation: Department of Radiological Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Sakano
authors.affiliation: Department of Radiological Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Hamada
authors.affiliation: Department of Radiological Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Shimizu
authors.affiliation: Department of Radiological Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan fukushi@tmu.ac.jp.
authors.forename: M
authors.initials: M
authors.lastname: Fukushi
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis; D001681:Biological Assay / Q000379:methods; D028203:Cedrus / Q000737:chemistry*; D002587:Cesium Isotopes / Q000032:analysis*; D062406:Fukushima Nuclear Accident; D007564:Japan; D011058:Pollen / Q000737:chemistry*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods*; D011847:Radioactive Fallout / Q000032:analysis; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D062211:Spatio-Temporal Analysis
chemical_list: D000396:Air Pollutants, Radioactive; D002587:Cesium Isotopes; D011847:Radioactive Fallout; D012990:Soil Pollutants, Radioactive