The Parallel Model System LM-MUSCAT for Chemistry-Transport Simulations: Coupling Scheme, Parallelization and Applications

摘要

The physical and chemical processes in the atmosphere are very complex. They occur simultaneously, coupled and in a wide range of scales. These facts have to be taken into account in the numerical methods for the solution of the model equations. The numerical techniques should allow the use of different resolutions in space and also in time. Air quality models base on mass balances described by systems of time-dependent, three-dimensional advection-diffusion-reaction equations. A parallel version of the multiscale chemistry-transport code MUSCAT is presented which is based on multiblock grid techniques and implicit-explicit (IMEX) time integration schemes. The meteorological fields are generated simultaneously by the non-hydrostatic meteorological model LM. Both codes run in parallel mode on a predefined number of processors and exchange informations by an implemented coupler interface. The ability and performance of the model system are discussed for a "Berlioz" ozone episode.