Relating Small-Scale Emission and Concentration Variability in Air Quality Models

A novel approach to account for the spatial variability of the small-scale emission in air quality models is proposed. This approach includes a formulation for the sub-grid variability of pollutant concentrations and relates it to the spatial het- erogeneity of the emissions. The parameterization is implemented in a 3D transport model and tested against large eddy simulations of convective atmospheric bound- ary layers.