Validating high resolution regional models , Validierung hochauflösender Regionalmodelle

A validation concept for high-resolution atmospheric limited-area models is presented. It takes into account model characteristics, model realisation and results from selected case studies. It includes five criteria: completeness, controllability, realisation quality, result quality and result control. To derive these criteria, the physical and mathematical bases for modelling mesoscale-β and mesoscale-γ phenomena are described together with typical approximations and parameterizations. Model applications are introduced that can be used for the validation of high-resolution limited-area models. All five criteria of the validation concept are applied to the mesoscale transport and stream model METRAS.