Chronological Order Change of Artificial Heat Distributions in Tokyo 23 Wards and the Comparison with Osaka and Nagoya City

Abstract

The summer artificial heat maps in 23 wards of Tokyo were made in every 5 years in 1974-1994. The characteristics of these maps are as follows; 1) It is possible to obtain accurate distribution spatially. 2) The amount of art if icial heat is evaluated in terms of each energy source. 3) The chronological order change of artificial heat map during 20 years is shown. On the basis of the maps, spatial-temporal structure and characteristics of the summer artificial heat distributions were discussed. The artificial heat in the city center and sub-center areas has been increasing in 1974-1994 inclusive, and the increase quantity tends to become larger. Final ly, the characteristics of the heat distribution in 23 wards of Tokyo were compared with ones in Osaka and Nagoya City.