Optimisation of a Numerical Model to Simulate the Dispersion and Chemical Transformations Within the Oxides of Nitrogen/Ozone System as Traffic Pollution Enters an Urban Greenspace

Abstract Urban greenspace has many health benefits, including cleaner air than the surrounding streets. In this study, a detailed exercise been conducted to measure concentrations of NO/NO 2 /NO x and O 3 within an urban greenspace, University Birmingham campus, using continuous analysers, as well transects NO measured with diffusion tubes. Concentrations have simulated ADMS-Roads model which optimised initially for traffic emissions on roads, background concentrations, meteorological data considering four candidate sites. Optimisation prediction shows critical importance :NO ratio in emissions, derivation from atmospheric measurements is consistent value derived optimisation fit roadside data. After optimisation, gives excellent at roadside. Comparison predictions across also show generally good performance. The incorporation dry deposition processes nitrogen oxides into leads reduction less 1% predicted leading conclusion that primarily result dispersion rather processes.