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).

本数据集依托福岛第一核电站事故的优化源项，通过大气扩散模拟构建而成。数据集包含960个NetCDF格式的数据文件，涵盖两个计算域的逐小时输出结果：其一为局地计算域，覆盖190×190平方千米范围，空间分辨率为1千米；其二为区域计算域，覆盖570×570平方千米范围，空间分辨率为3千米。输出时间跨度为2011年3月11日16:00协调世界时（UTC）（对应日本标准时（JST）3月12日01:00）至2011年3月31日15:00协调世界时（UTC）（对应日本标准时（JST）4月1日00:00），共计480个输出时刻。数据内容包含：表层大气浓度的水平二维分布；放射性核素的地表沉积数据（含总沉积、干沉积、湿沉积与雾沉积），其中放射性核素涵盖总131碘、131碘化学形态（单质碘I2、碘甲烷CH3I与颗粒态碘）、134铯、137铯以及132碲；此外还包含水平风分量、降雨强度与地面高程数据。