STUDY ON THE EFFCTS OF URBANIZATION ON THE COOLING EFFECTS OF THE SEA BREEZE

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  • 都市化が海風の冷却効果に及ぼす影響に関する研究

Abstract

The decrease of the cooling effect potential of the sea breeze is analyzed by using the calculation results of the meso-scale meteorological model WRF. The impacts of urbanization and the distance from the coast have been studied. Because the upper wind velocity and the convective heat transfer coefficient are increased due to the penetration of the sea breeze, sensible heat flux from near the surface to upper air is increased, then low air temperatures near the ground surface continues. This is the mechanism of air temperature reduction near the ground surface by the sea breeze. The impact of urbanization to the heat exchange over the ground and upper air which is represented by the convective heat transfer coefficient has been studied from the calculation results in different urbanization status by changing the parameters of the urban canopy model. The cooling effects of the sea breeze are strongly affected by the distance from the coast more than the impacts of urbanization.

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