Advances in Science and Research www.adv-sci-res.net 1992-0628 1992-0636 2 7th EMS Annual Meeting and 8th European Conference on Applications of Meteorology 2007 2008 10.5194/asr-2-89-2008 http://www.adv-sci-res.net/2/89/2008/ http://www.adv-sci-res.net/2/89/2008/asr-2-89-2008.html http://www.adv-sci-res.net/2/89/2008/asr-2-89-2008.pdf 89 98 2008-05-28 Caliope: an operational air quality forecasting system for the Iberian Peninsula, Balearic Islands and Canary Islands – first annual evaluation and ongoing developments J. M. Baldasano jose.baldasano@bsc.es P. Jiménez-Guerrero O. Jorba C. Pérez E. López P. Güereca F. Martín M. G. Vivanco I. Palomino X. Querol M. Pandolfi M. J. Sanz J. J. Diéguez Earth Sciences Department, Barcelona Supercomputing Center – Centro Nacional de Supercomputación (BSC-CNS), Barcelona, Spain Environmental Modelling Laboratory, Technical University of Catalonia (UPC), Barcelona, Spain Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain Instituto de Ciencias de la Tierra "Jaume Almera" (CSIC-IJA), Barcelona, Spain Fundación Centro de Estudios Ambientales del Mediterráneo (CEAM), Paterna, Spain The Caliope project funded by the Spanish Ministry of the Environment establishes an air quality forecasting system for Spain to increase the knowledge on transport and dynamics of pollutants in Spain, to assure the accomplishment of legislation and to inform the population about the levels of pollutants, topics in which the European Commission has shown a great concern. The present contribution describes the first quantitative verification study performed so far with two chemistry transport models (CMAQ and CHIMERE) for a reference year (2004) at medium spatial resolution (around 20×20 km for the Iberian Peninsula). Both models perform similarly in the case of ground-level ozone. The mean normalised gross error MNGE remains below 15–20% during summertime, when ozone episodes occur, outlining the good skills of the system concerning the forecasting of air quality in Spain. Furthermore, the ongoing developments of the system towards high resolution modelling (4×4 km for Spain, 12×12 km for Europe, 1 h temporal resolution) and the integration with observations within the Caliope umbrella are described. Arévalo, G., Salvador, R., Gassó, S., Millan, M., and Baldasano, J. M.: Application of a high-resolution emission model in Valencia Community (Spain), in: Air Pollution 2004, edited by: WITpress, Rhodes Greece, 31–40, 2004. Baldasano, J. 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