CONSTRUCTION OF URBAN MORPHOLOGICAL AND AERO-DYNAMICAL PARAMETERS OVER JAPAN AND USA

Abstract

 In order improve the accuracy of urban weather simulations using mesoscale models, we constructed high-resolution database of urban geometric parameters for Japan and the U.S. These countries offer detailed building data across all alnd areas. In addition, we undertook a sensitivity analysis of the urban geometric parameters. This involved inputing them into a one-dimensional offline calculation using an urban canopy model. As a result, it became clear that not just aerothermodynamic parameters, but also building morphologicl parameters such as plan area index and average building height significantly impact weather calculations. This result indicate the necessity for a highly accurate database.