DISPERSION MODELING OF NITROGEN-OXIDES IN THE UNITED-KINGDOM

This paper describes the construction and application of an Eulerian-dispersion model for the calculation of NO2 and NOx concentrations in the U.K. Model results are compared with measurements from 44 U.K. sites. The sensitivity of the model results to chemical and dispersion parameterisations is assessed. The model is also used to verify the validity of 'instantaneous mixing' assumptions used in trajectory models. Finally, the distribution of ground-level NOx concentrations from power stations, motor vehicles and other stationary sources is calculated across the U.K., including a preliminary assessment of the possible contribution from natural sources. © 1990.