Characterizing urban heat island in Montreal (Canada)-Effect of urban morphology

The UCM has a detailed procedure that considers the multi-reflection between urban surfaces to estimate the energy budget of the canopy. Major portion of the absorbed energy in the canopy is from the solar radiation on urban surfaces, which is highly dependent on their sky view factors. We propose a new parameterization for sky view factor of walls and compare it with other parameterizations and approximated field data. Implementing the new parameterization decreases the predicted UHII and the energy consumption by 0.4 °C and 1% in the simulation period, respectively.