Seven regional air-quality analysis and forecasting systems are operated routinely for MACC (CHIMERE, EMEP, EURAD, LOTOS-EUROS, MATCH, MOCAGE and SILAM). Product dissemination in the form of web-based graphical displays and supply of data products for the European domain may in due course be distributed rather than handled by the central project web site as is done in GEMS. The regional service draws not only on what has been developed in GEMS but also on the Integrated Air Quality assessment and forecasting service operated by PROMOTE.

The products are:

• Daily air-quality analyses (hourly) for the day before from each model
• Daily air-quality forecasts up to 72h (hourly) from each model
• Daily ensemble air-quality analyses (hourly) for the day before
• Daily ensemble air-quality forecasts up to 72h (hourly)
• Ensemble air-quality reanalyses for the years 2007, 2008 and 2009

Development of the detailed technical specification of the products and dissemination has begun. QC/QA dossiers for each of the seven models have been compiled. Each dossier is expected to be updated every six months. They comprise:

• the detailed description of the model version and assimilation system used, including a history of the changes during MACC;
• a model development plan indicating the current upgrade and recovery actions decided, and their schedule in time;
• a log and corresponding statistics of the daily delivery of products (time, completeness, ...);
• a history of model skill scores over Europe, taken from quarterly reports on model evaluation statistics (see Regional Products Listing).

The dossiers thus provide an up-to-date reference for the production systems.

Some of the support software available from the ECMWF website is applicable to the regional data products, which are provided in version 2 of the GRIB code.