COMPUTATIONAL AND NUMERICAL BACKGROUND OF THE UNIFIED DANISH EULERIAN MODEL

摘要

The necessity to handle efficiently large-scale air pollution models in order to be able to resolves a series of comprehensive environmental tasks is discussed. It is emphasized that the choice of fast and, at the same time, sufficiently accurate numerical methods is very important, but not sufficient. It is also necessary to exploit efficiently the cache memory of the computer under consideration and/or to be able to carry out parallel computations. The particular model used is the Unified Danish Eulerian Model (UNI-DEM), but most of the results can also be applied when other large-scale models are used. The use of UNI-DEM in several comprehensive air pollution studies is discussed in the end of this paper. The investigation of the impact of future climate changes on air pollution levels in some European countries is among the most important studis in which UNI-DEM has until now been used.