Abstract
In part 2, the calculation method and the field observation of the earth surface heat budget were described. In this paper, first, the result of the annual calculation on the architectural scale of the earth surface heat budget is described (Osaka, 1970). The annual mean surface temperature of the building roof and the asphalt pavement is higher about 2℃ than the grass and the forest. The temperature differences between various land uses are large, particularly at summer season. The sensible heat flux is large at the asphalt pavement and the building roof, and the latent heat flux is large at the water surface, the naked ground and the green area. Secondly, the result of the diurnal calculation at summer season is described (Osaka, August, 1966). The differences of the earth surface temperature between various land uses in the daytime are more larger than the result of the annual or monthly mean surface temperature. On the monthly mean of daily max surface temperature, the asphalt pavement and the building roof are higher about 10〜20℃ than the grass and the forest. The heat fluxes of various land uses are remarkably on the sensible heat and latent heat. The sensible heat flux of the asphalt pavement and the building roof is much larger than the grass and the forest in the daytime and the sensible heat flux of the asphalt pavement and the building roof is more than 200kcal/m^2・h at some days. The sensible heat flux of the forest is generally negative value. One of the reasons was considered the same phenomenon as the 'oasis effect', because the meteorological data used was observed in the centre of the city. Accordingly, the latent heat flux of the forest is large.
