This activity aims at providing a specific benchmarking framework for modelled air quality forecasts. Performance indicators have been developed to provide additional information about the capability of the forecasting system to detect and anticipate regulatory threshold exceedances and to check its ability to provide accurate forecasts (benchmarked against the "persistence model"). The activities within this crosscutting task focus on:

• 1 Testing the proposed indicators (currently normalized by the persistence model) with additional datasets (in particular CAMS).
• 2 Elaborating a guidance document on the use of forecast indicators for the assessment of the quality of forecast applications.