title: Inverse estimation of radon flux distribution for East Asia using measured atmospheric radon concentration.
abstract: In this study, the (222)Rn flux density distribution at surface was estimated in East Asia with the Bayesian synthesis inversion using measurement data and a long-range atmospheric (222)Rn transport model. Surface atmospheric (222)Rn concentrations measured at Hateruma Island in January 2008 were used. The estimated (222)Rn flux densities were generally higher than the prior ones. The area-weighted mean (222)Rn flux density for East Asia in January 2008 was estimated to be 44.0 mBq m(-2) s(-1). The use of the estimated (222)Rn flux density improved the discrepancy of the model-calculated concentrations with the measurements at Hateruma Island.
authors.affiliation: Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusaku, Nagoya 464-8603, Japan hirao.shigekazu@c.mbox.nagoya-u.ac.jp.
authors.forename: S
authors.initials: S
authors.lastname: Hirao
authors.affiliation: Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusaku, Nagoya 464-8603, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Hayashi
authors.affiliation: Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusaku, Nagoya 464-8603, Japan.
authors.forename: J
authors.initials: J
authors.lastname: Moriizumi
authors.affiliation: Department of Energy Engineering and Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusaku, Nagoya 464-8603, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Yamazawa
authors.affiliation: Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba 305-8506, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Tohjima
authors.affiliation: Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba 305-8506, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Mukai
mesh_terms: D000392:Air Movements; D000398:Air Pollution, Radioactive / Q000706:statistics & numerical data*; D000465:Algorithms; D001272:Atmosphere / Q000737:chemistry*; D001499:Bayes Theorem; D003198:Computer Simulation; D005202:Asia, Eastern; D062312:Islands; D007564:Japan; D015233:Models, Statistical; D010363:Pattern Recognition, Automated / Q000379:methods; D011829:Radiation Dosage; D011886:Radon / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D011886:Radon