Author(s)

P. Sahm and N. Moussiopoulos

Abstract

The Ozone Fine Structure (OFIS) model is capable of simulating photochemical transformations in an urban plume at a very low computational effort. This newly developed Eulerian model may be used to assess urban scale ozone levels, e.g. for estimating ozone threshold value exceedances. In this paper the OFIS model is presented and results of its application to Stuttgart are used to demonstrate that urban scale effects should be taken into account for proper estimates of ozone levels in the vicinity of conurbations. In particular, it is shown that European wide emission reductions are necessary for achieving substantial decreases of ozone exposure at the urban scale. Moreover, the results of OFIS allow assessing the effectiveness of urban VOC and NOx control. The displayed results confirm the suitability of the OFIS model f

Keywords