COST 715 Meteorology Applied to Urban Air Pollution Problems September 98-September 2003 Problem Issues covered Successes Conclusions

Traditional approach to ABL non-dimensional profiles

iiiiii wEwE Dynamics Thermodynamics In-street pollution

unstable day neutralstable night stability sky conditions temperature profile boundary layer height turbulence intensity radiation balance Figure 3 Qualitative presentation of atmospheric turbulence intensity, temperature profile, and the radiation balance during unstable, neutral and stable atmosphere height temperature

Parameters u C wind in urban canopy L C canopy length scale w E exchange velocity u ref reference wind h ref blending height u rural ->u urban transfer function h urban height of urban boundary layer z 0 roughness length based on geometry

Relationship between incremental NOx and incremental NO2

Relationship between incremental NOx concentrations in road side air and incremental NO2 concentration

BUBBLE experiment Basel

Recommendations on deriving meteorological parameters for application to urban air pollution estimates  Mixing height for urban background concentrations, atmospheric stability for dispersion  Street and urban background wind, for dispersion within above streets  Urban episodes, availability of tools, potential developments, uncertainty  Inventory of urban meteorological sites, use of data, recommendations for siting, local meteorological data and corrections, choice site location.

Kukkonen, J. (editor), 2001, COST action 715, Meteorology applied to Urban Air Pollution Problems, Working Group 3, Meteorology during peak pollution episodes, Status Report, Luxembourg Office for Official Publications of the European Communities, EUR 19448, European Commission, Brussels, 73 pages Middleton D R, 2002, Meteorological challenges in urban air pollution, Clean Air, 32, Piringer M and Kukkonen J (editors), 2002, COST action 715, Meteorology applied to Urban Air Pollution Problems, Mixing height, inversions and episodes in urban areas (Toulouse, 3-4 October 2001), Luxembourg Office for Official Publications of the European Communities, to be published, available at Rotach M. (editor) 2001, COST action 715, Meteorology applied to Urban Air Pollution Problems, Workshop on Urban Boundary Layer Parameterisations (Zurich, 24-5 May 2001) Luxembourg Office for Official Publications of the European Communities, to be published Schatzmann M, Brechler J and Fisher B (editors), 2001, Preparation of meteorological input data for urban site studies, COST European co-operation in the field of scientific and technical research, Luxembourg Office for Official Publications of the European Communities, EUR Some publications

COST 715 Achievements Raised issue of urban meteorology Inventory of urban met sites New data sets New theories International involvement New projects FUMAPEX