The precautionary principle requires that we estimate the environmental effects of building measures or conversion of land use already prior to their realization. One aspect that must be taken into account here is the impact on regional or local climate.

Not only large-scale projects like airports or reservoirs can influence the local or regional climatic characteristics. Even relatively small building measures or land use conversions may lead to undesirable results e.g. regarding the air circulation in residential areas.

By means of atmospheric simulation models it is possible to quantify climatic effects a priori and thus develop alternative solutions. In urban and regional planning model examinations at an early stage help identify climatic correlations and optimize future utilization plans. Finally model examinations allow us to close gaps in the nationwide collection of meteorological data. In that way, for instance, stability class frequency distributions can be transferred to another location or synthetic wind statistics can be created.