INFLUENCE OF THE URBAN HEAT ISLAND PHENOMENON IN TOKYO ON LAND AND SEA BREEZES

This study analyzed the influence of the urban heat island (UHI) in Tokyo on land and sea breezes based on the observational data in two summers. Wind speed of northerly land breeze that observed late at night decreased clearly between the center of Tokyo and the coastal area. It means that the stagnation of land breeze front occurred due to the UHI in Tokyo. Consequently, a calm zone or convergence zone was formed in the leeward side of the center of Tokyo at that time. The calm zone, which coincided with a low pressure area, formed not only on land and sea breezes days but also on weak wind days, regardless of a hot or a cool summer