Author(s)

R San José, J L Pérez, F Blanco, R Barquín & R M González

Abstract

The continuous increase on the vehicle fleet in Europe is contributing in a very significant portion to total emission budget particularly over cities with high population density. The ozone concentrations are particularly sensitivity to NOX and VOC’S emissions produced by vehicle traffic, The importance of long range transport on urban ozone concentrations is a task subject to heavy research in the last years since urban emission reduction strategies seem to impact on ozone concentration reductions lower than expected. The impact of long range transport is becoming more and more important to explain the resistance to ozone concentrations to be reduced by taking into account only local vehicle traffic emission reductions strategies. In this contribution we have used the MM5 (PSWNCAR) meteorological model and CMAQ (EPA, U. S.) air quality modelling system to simulate the impact of NOX emissions due to vehicle traffic (road traffic) on ozone concentrations over the Iberian Peninsula nesting over Madrid domain. The mother domain covers a 8100 km x 6480 km centered over the Iberian Peninsula but taking most of North of Africa and up to the North part of Norway. Three nesting levels are used up to Madrid Community level. High sensitivity of emission at Iberian Peninsula level (nesting level 1) are found.

Keywords