Project: Multi-sector urban development impact model - The aim of the project is to develop a multi-sector urban development impact model, which combines findings from the social, natural and engineering sciences to identify the effects that cities have on their inhabitants. Summary: The Simple Urban Radiation Model (SURM) is a model to calculate mean radiant temperature in an idealised symmetric street canyon. The model can be used either stand-alone with standard meteorological parameters as inputs or for radiation modifications in a built-up area with radiation fluxes from a mesoscale model or measurements.