Author(s)

F. Brocheton, B. Aumont, G. Toupance and C. Granier

Abstract

Sensitivity of Global CTM Models to the Spatial Representation of the Emissions A contribution to subproject GLOREAM F. Brocheton\ B Aumont\ G. Toupance* and C Granier^ Introduction Ozone production, especially in the remote troposphere, is highly sensitive to nitrogen oxide (NOx) concentrations. In the northern hemisphere, the main NOx sources are anthropogenic emissions which contribute in the range 30 to 60 % to the NO* load in the middle troposphere (Lamarque et al., 1996). Since NOx lifetime is only of about one day, the long range transport of NOx occurs mainly through secondary nitrogen species which constitute the NOx reservoirs (PANs, RONO], ...). These secondary species are produced close to the NOx sources, and are strongly dependent on the volatile organic compounds (VOC) and NOx mixing ratios. Therefore, the modelling of NOx concentration at global scale requires a precise evaluation of the quantity of nitrogen reservoirs pr

Keywords