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-2-41-2008 http://www.adv-sci-res.net/2/41/2008/ http://www.adv-sci-res.net/2/41/2008/asr-2-41-2008.html http://www.adv-sci-res.net/2/41/2008/asr-2-41-2008.pdf 41 46 2008-05-07 ENVIRO-HIRLAM: on-line coupled modelling of urban meteorology and air pollution A. Baklanov alb@dmi.dk U. Korsholm A. Mahura C. Petersen A. Gross Danish Meteorological Institute, DMI, Lyngbyvej 100, 2100 Copenhagen, Denmark The strategy of new generation integrated Meso-Meteorological (MetM) and Atmospheric Chemical Transport (ACT) models for predicting atmospheric composition, meteorology and climate change is discussed for the Enviro-HIRLAM (HIgh Resolution Limited Area Model) integrated system. Current progress in the Enviro-HIRLAM system development and its urban on-line coupled modelling applications is considered. Results of several sensitivity studies of the urban effects (urban albedo and roughness, anthropogenic heat flux, heat island, and urban aerosols) on meteorology and air pollution at different scales are presented. Several sensitivity tests of the off-line versus on-line coupling of MetM and ACT models in Enviro-HIRLAM as well as their verification versus the ETEX experiment are considered and results are discussed. Baklanov, A.: Meteorological advances and systems for urban air quality forecasting and assessments. Short Papers of the 5th International Conference on Urban Air Quality Valencia, Spain, 29–31 March 2005, CLEAR, 22–25, 2005. Baklanov, A., Gross, A., and Sørensen, J. H.: Modelling and forecasting of regional and urban air quality and microclimate, J. Computational Technologies, 9, 82–97, 2004. Baklanov, A., Mahura, A., Nielsen, N. W., and Petersen, C.: Approaches for urbanization of DMI-HIRLAM NWP model, HIRLAM Newsletter, 49, 61–75, 2005. 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