Operational air pollution forecasts from regional scale to urban street scale. Part 2: Performance evaluation

An operational air pollution forecast model system has been developed. The model system includes several models capable of calculating air pollution concentrations at different spatial scales, from European scale over urban background scale to urban street scale. The air pollution models are driven by the numerical weather forecast model, the ETA model. Operational 3 days air pollution forecasts are produced 4 times a day. Model results from the air pollution models and the weather forecast model have been compared to measurements from the Danish urban monitoring network. The performance with respect to mean values, temporal variability and daily maximum of air pollution levels, are evaluated. (C) 2001 Elsevier Science Ltd. All rights reserved.