Efficient high resolution methods for air pollution models

摘要

This paper investigates the use of time dependent adaptive gridding techniques for the solution of atmospheric reaction/flow problems. Preliminary 2D studies related to the effects of power station emissions on regional ozone levels have been carried out. The results show the importance of using adaptive grids in order to represent the interaction of the plume with background air over large distances. The adaptive mesh automatically reveals features of cross wind concentration profiles which would not be shown using the standard mesh sizes adopted in regional atmospheric calculations. As the level of adaptivity increases, and the mesh becomes locally refined in regions of steep spatial gradients, the total and peak ozone concentrations change quite significantly. The results demonstrate the advantage of using adaptive meshes in solving multi-scale atmospheric problems with spatially inhomogeneous source patterns.