EVALUATION OF THE IMPACT OF DIFFERENT SENSIBLE HEAT TRANSPORT MODERING ON SEA BREEZE FRONTS IN URBAN CANOPY MODELS

Abstract

 We evaluated the effect of different sensible heat transport modeling on sea breeze fronts in urban canopy model, taking into account appropriate urban thermodynamic and aerodynamic effects. A total of 4 cases with different sensible heat transport models and different settings for the oasis effect of vegetation were calculated for sea breeze days in Kanto region in Japan. The results show that in the calculation cases with the Top-down method, which calculates sensible heat fluxes considering the coarseness and density of the entire urban canopy with and without the oasis effect, is used for the heat transport process, the sea breeze is delayed in the metropolitan area despite the strong pressure driving force between the land and sea surfaces. This is due to the increase in friction velocity, or turbulent mixing, with increasing roughness, indicating the importance of properly considering urban geometry and properly incorporating it into the modeling.