URBAN OZONE MODELING BY USING A PROGNOSTIC EULERIAN AIR-QUALITY SYSTEM - MADRID CASE-STUDY

Air quality models are essential tools in the understanding of polluta nt dynamics in the urban atmosphere. In this contribution we present a n air quality system (ANA), which is composed of a meteorological modu le that uses a three-dimensional approach with terrain-following coord inates and the non-hydrostatic approach, and a detailed emission model (250 x 250 m) that includes the anthropogenic and biogenic emissions over the area of study (the Madrid area of 80 x 100 km). The biogenic emissions and the land-use classes are obtained by using LANDSAT-5 sat ellite imagery. A photochemical module based on the CBM-IV scheme and the SMVGEAR numerical method for solving the atmospheric chemistry are used. The results are compared with data obtained from the Madrid Mun icipality ozone network. The simulated ozone values for a five-day per iod (5-9 June 1995) compare well with those observed on the ozone netw ork stations.