Ozone Modelling Over A Large City By Using A Mesoscale Eulerian Model: Madrid Case Study

An Air Quality Model has been applied over the mesoscale urban area of Madrid (Spain). The Model is composed on different modules: a mesoscale meteorological module REMEST which solves the Navier-Stokes equation system over the Madrid domain. This model is running under the non-hydrostatic option and is the main code of the system. The model solves the prognostic equations by using an Eulerian approach and integrated an eulerian transport equation which is solved simultaneously. The meteorological module provides the wind speed, direction, temperature and humidity on a three dimensional domain at very short time steps (a few seconds). The model uses a 14 different landuse types which are obtained by using the REMO module which uses the information provided by the LANDUSE satellite image over the area with 30 m spatial resolution. The model transport the emitted pollutants into the domain and deposit them over the domain. The emission module EMIMA takes into account the point, line and area emissions over the area. Special importance is given to the biogenic emissions which are obtained by using the satellite landuse classification for caducous, perenneal and mixed terrain. The emission module considers the EPA and CORINAIR emission factors and is 250x250 m spatial resolution and 1 hour temporal resolution. The deposition module DEPO uses the resistance approach Transactions on Ecology and the Environment vol 10, © 1996 WIT Press, www.witpress.com, ISSN 1743-3541