| Summary: | Dispersion of gas and particulate matter (PM) pollutant in urban environments is a rising concern. Physical and numerical modelling is extremely challenging due to a number of parameters involved including the turbulence nature and complex physical and/or chemical processes. The paper attempts to review the latest advances on this topic. The major contents are: street canyon model, coupling meso-scale (weather scale) and micro-scale (street scale) Lareg-Eddy Simulations, effects of thermal stratification, effects of tall buildings, modelling extreme pollutant concentration in extreme conditions and coupling chemistry with turbulence. This paper focuses more on the progress of the numerical model study in the UK and Europe.
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