A new Lagrangian-Eulerian coupling model system

A new Lagrangian-Eulerian coupling model system is developed to study regio nal air quality. The system consists of mesoscale dynamical meteorological model (MM). Monte-Carlo model (MCM), parameterized model on planetary bound ary layer (PBL) turbulent statistics, dry and wet removal model, and Euleri an nonlinear chemical model (ENCM). The physical, chemical and biological p rocesses on air pollutants are considered comprehensively. 3-D distribution laws for acidic gaseous pollutants (SO2 and NOx) emitted by Thai Mae Moh P ower Plant and the secondary pollutants are studied in detail. The results simulated by the coupling model system are in good agreement with observati onal concentration data.