A multi-scale model is built by means of non-hydrostatic dynamics meteorological model and Lagrange particle model. According to the model, the ECMWF forecasting data and different resolution terrain data are used for the simulation of the European Tracer Experiment (ETEX), and simulation results and the monitoring results of ETEX are analyzed to study the application of the diffusion model to multiscale simulation. The results show that the multi-scale diffusion simulation results and the observations have high spatial distribution correlations, and that the diffusion simulation results effectively reflect the characteristics of the regional flow field at that time.

multiscale  /  diffusion  /  European tracer experiment  /  numerical simulation