Study and issue of atmosphere and ocean simulations of Japan Atomic Energy Agency

Kadowaki, Masanao   

A numerical simulation is highly important to estimate temporal and spatial distributions of radionuclides in the atmosphere and ocean. NSEC (Nuclear Science and Engineering Center), Research Group for Environmental Science have developed the atmospheric advection-diffusion model GEARN and the oceanic dispersion model SEA-GEARN. In this presentation, we introduce the detail of our models, the research results which were conducted using the models and the joint research system. Our simulation issues, for instance, the atmospheric model designed by semi-Lagrangian advection scheme, ensemble forecasting simulations for radionuclides, coastal ocean simulations and nudging of radionuclide concentrations for the ocean model, are also discussed.