Evaluation Of Oml And Aermod

Results from an evaluation of three dispersion models are presented: the currently operational OML model, a new, improved 'Research Version' of OML, and the US AERMOD model. The evaluation is based on the Prairie Grass data set. For these data the OML Research Version appears superior to the other two models. Further, the paper discusses problems and pitfalls of the Prairie Grass data set. The criteria for exclusion of data have tremendous impact on evaluation metrics. A new Wiki on Atmospheric Dispersion has the potential to become a very useful focal point to pool and communicate experiences on data sets such as Prairie Grass.