title: Fukushima Daiichi Nuclear Plant accident: Atmospheric and oceanic impacts over the five years.
abstract: The Fukushima Daiichi Nuclear Plant (FDNPP) accident resulted in huge environmental and socioeconomic impacts to Japan. To document the actual environmental and socioeconomic effects of the FDNPP accident, we describe here atmospheric and marine contamination due to radionuclides released from the FDNPP accident using papers published during past five years, in which temporal and spatial variations of FDNPP-derived radionuclides in air, deposition and seawater and their mapping are recorded by local, regional and global monitoring activities. High radioactivity-contaminated area in land were formed by the dispersion of the radioactive cloud and precipitation, depending on land topography and local meteorological conditions, whereas extremely high concentrations of (131)I and radiocesium in seawater occurred due to direct release of radioactivity-contaminated stagnant water in addition to atmospheric deposition. For both of atmosphere and ocean, numerical model simulations, including local, regional and global-scale modeling, were extensively employed to evaluate source terms of the FDNPP-derived radionuclides from the monitoring data. These models also provided predictions of the dispersion and high deposition areas of the FDNPP-derived radionuclides. However, there are significant differences between the observed and simulated values. Then, the monitoring data would give a good opportunity to improve numerical modeling.
authors.affiliation: Department of Materials and Life Sciences, Sophia University, Tokyo, Japan. Electronic address: hirose45037@mail2.accsnet.ne.jp.
authors.forename: Katsumi
authors.initials: K
authors.lastname: Hirose
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D002588:Cesium Radioisotopes / Q000032:analysis; D062406:Fukushima Nuclear Accident; D007457:Iodine Radioisotopes / Q000032:analysis; D007564:Japan; D009792:Oceans and Seas; D012959:Socioeconomic Factors; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D000396:Air Pollutants, Radioactive; D002588:Cesium Radioisotopes; D007457:Iodine Radioisotopes; D014875:Water Pollutants, Radioactive
keywords: (131)I; (137)Cs; Atmosphere; Deposition; Dispersion; Fukushima Daiichi Nuclear Power Plant; Numerical model; Ocean; Source term