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It is necessary to simulate the air temperature in urban boundary layers under various conditions for improvement of the urban thermal environment. One-dimensional numerical model for the atmospheric ...boundary layer is applied to the urban area in this paper. The atmospheric boundary layer is regarded to be composed of three layers, the canopy layer, the surface layer and the Ekman layer. In the Ekman layer, potential temperature and specific humidity are calculated. In the surface layer, the vertical distributions of wind speed, potential temperature and specific humidity are solved from the universal function, a function of the stability of the atmosphere. The canopy layer means under the average height of buildings. Wind speed, air temperature and specific humidity are regarded as uniform here. Heat balance is solved on the ground and buildings surface. Several parameters are set in this model． This simulation model is applied to the urban area where the field observation was carried out to examine the accuracy of this mode1. If several parameters are adjusted for the field observation condition, the results of the numerical simulation are corresponding to the field data. Moreover, the sensibility of these parameters on the urban atmospheric boundary layer are examined.続きを見る
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