Fine-grid resolution in danish eulerian model and an implementation on SGI origin 2000 computer

Abstract

The transboundary transport of air pollutants and the chemicaltransformations during the transport (including here the photochemicalreactions) are still causing great problems in the modern society. Itis expected that this problem will become even more important in thenear future. Therefore, the possibility to know in advance some typicalsituations with at least the most dangerous air pollutants (e.g. ozone) isof great interest of the environmental specialists and decision makers. Inorder to estimate the situation and take efforts to reduce the air pollutionto some acceptable levels the output results of the air pollution modelshave to be obtained in real time (operational), over an appropriate scaleand be as reliable as possible.Results that are obtained by using fine grid resolution of 10km. in theDanish Eulerian Model, i.e. when the space domain is discretized by usinga (480×480) grid, and the number of the chemical compounds is 35,are discussed in this paper. A parallel version of the model for sharedmemory parallel computers with an Open MP installation was used forthe experiments with real data on an SGI Origin 2000 computer with upto 16 processors available. One can find short description of the mathematicalmodel, the splitting procedure and the numerical techniques used.