Data for: Refinement of Source Term and Atmospheric Dispersion Simulations of Radionuclides during the Fukushima Daiichi Nuclear Power Station Accident

The database was generated by the atmospheric dispersion simulations using the optimized source term of the Fukushima Daiichi Nuclear Power Station accident. It consists of 960 data files in the NetCDF format, including horizontal 2-D distributions of air concentration in the surface layer and surface deposition (total deposition, dry deposition, wet deposition, and fog deposition) of radionuclides (total 131I, 131I chemical species (I2, CH3I, and particulate iodine), 134Cs, 137Cs, and 132Te), horizontal wind components, rain intensity, and ground elevation in two calculation domains (local: 190 × 190 km2 area with a 1 km resolution, regional: 570 × 570 km2 area with a 3 km resolution) for hourly output times from 16:00 UTC on March 11 (01:00 JST on March 12) to 15:00 UTC on March 31 (00:00 JST on April 1), 2011 (480 output times).本数据集基于福岛第一核电站事故优化后的源项，通过大气扩散模拟生成。其包含960个NetCDF（NetCDF）格式的数据文件，涵盖近地层大气放射性核素浓度的水平二维分布，以及放射性核素的地表沉积数据（涵盖总沉积、干沉积、湿沉积与雾沉积）；所涉放射性核素包括总131碘、131碘化学形态（单质碘I2、碘甲烷CH3I及颗粒态碘）、134铯、137铯与132碲。此外数据集还包含水平风场分量、降雨强度及地面高程数据。计算域分为两类：局地域（190×190平方千米，空间分辨率1千米）与区域域（570×570平方千米，空间分辨率3千米）。输出时间为2011年3月11日世界协调时（UTC）16:00（对应日本标准时（JST）3月12日01:00）至2011年3月31日世界协调时15:00（对应日本标准时4月1日00:00），共计480个逐小时输出时刻。