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City-Delta is a model inter-comparison exercise of different atmospheric chemistry-transport (CTM) dispersion models which is open for all interested air quality modelling groups in Europe. The model comparison is launched by the JRC-IES in collaboration with EMEP, IIASA and EUROTRAC. It serves to support the modelling activities and cost-effectiveness analysis in the CAFE programme.
The model inter-comparison is conducted for eight European cities: Berlin, Copenhagen, Katowice, London, Marseille, Milan, Paris and Prague. It focuses on ambient levels of particulate matter and ozone in urban areas and addresses health-relevant matrices of exposure (e.g. long-term concentrations) to fine and coarse particles and ozone.
The objectives of the inter-comparison are:
- Assessment of the performance of available models and comparison with observational data
- Assistance of air-quality managers in quantifying the contribution of regional versus local sources and in identifying and assessing the most effective emission controls
- Provision of quantitative information in relation to legal obligations.
Models used within the Project/Programme:
AURORA, CALGRI, CAMx, CAMX, CHIMERE, EMEP, EPISODE, EUROS, LOTOS, MCCM, MOCAGE, MUSCAT, MUSE, OFIS, REM3, SMOG, STEM, THOR, TRANSCHIM, UAM-IV
Links to other Models, Projects, Networks:
- CAFE: City-Delta supports the Clean Air for Europe programme
- RAINS: City-Delta results (e.g. urban scale air pollution) have been implemented into the IIASA RAINS model
- EURODELTA: EURODELTA (An Inter-comparison of regional model responses to emission-reduction scenarios) is closely related to City-Delta; it focuses on gas and aerosol phase compounds concentrations
- JRC European Commission, IA Tools, supporting impact assessement in the European Commission