Towards improving the simulation of meteorological fields in urban areas through updated/advanced surface fluxes description A. Baklanov1, P. G. Mestayer2, A. Clappier3, S. Zilitinkevich4, S. Joffre5, A. Mahura1,2, and N. W. Nielsen1 1Meteorological Research Department, Danish Meteorological Institute, DMI, Copenhagen, Denmark 2Laboratoire de Mécanique des Fluides, UMR CNRS 6598, Ecole Centrale de Nantes, ECN, France 3La section Sciences et Ingénierie de l'Environnement (SSIE), Ecole Polytechnique Fédérale de Lausanne, EPFL, Switzerland 4Division of Atmospheric Sciences, University of Helsinki, Finland 5Research & Development, Finnish Meteorological Institute, FMI, Helsinki, Finland
Abstract. The increased resolution of numerical weather prediction models allows
nowadays addressing more realistically urban meteorology and air pollution
processes. This has triggered new interest in modelling and describing
experimentally the specific features and processes of urban areas. Recent
developments and results performed within the EU-funded project FUMAPEX on
integrated systems for forecasting urban meteorology and air pollution are
reported here. Sensitivity studies with respect to optimum resolution,
parametrisation of urban roughness and surface exchange fluxes and the role
of urban soil layers are carried out with advanced meso- or sub-meso
meteorological models. They show that sensible improvements can be achieved
by higher model resolution that is accompanied with better description of
urban surface features. Recommendations, especially with respect to advanced
urban air quality forecasting and information systems, are given together
with an assessment of the needed further research and data.
Citation: Baklanov, A., Mestayer, P. G., Clappier, A., Zilitinkevich, S., Joffre, S., Mahura, A., and Nielsen, N. W.: Towards improving the simulation of meteorological fields in urban areas through updated/advanced surface fluxes description, Atmos. Chem. Phys., 8, 523-543, doi:10.5194/acp-8-523-2008, 2008.