By using of NCEP/NCAR reanalysis data and surface observation precipitation data, thermodynamic features of the rainfall during 2—8 September 2004 is analyzed and the occurrence and maintenance of heavy rain excited by barotropic non-equilibrium force and baroclinic coupling forces between dynamic and thermodynamic fields is diagnosed.

The dynamic mesh technology of CFD is used to simulate the coupled-forced vibration and detached-forced vibration of the segmental model, and 2-D segmental model’s eight flutter derivatives and 3-D segmental model’s eighteen flutter derivatives are identified thr.

Many factors have impact on local circulation such as surface friction,topography,thermal forcing and so on.

For the barotropic potential vorticity equation (named the barotropic model) on a β-plane channel its solution is a stationary, wave-like pattern under a certain thermal forcing, while a quasi-periodic oscillation between two essential flow patterns appears if north-south thermal heating and wave-like topography are added as the .

Dynamic and numerical methods are used to discuss the atmospheric response imposed by SST thermal forcing.