Abstract
This study aims to clarify the regional characteristics of heat balance in an urban space inside a city. Since most of major cities in Japan are located in coastal areas, special attention is paid to the contribution of sea breeze to the heat balance in urban area. The spatial distribution of heat budget inside Sendai is drawn, as "heat balance map" using the numerical data provided by the analysis of mesoscale climate. This map shows the areas where the influence of sea breeze is larger than those of heat generated from ground surface and artificial heat release. In such areas, it is effective to introduce sea breeze into urban space by matching the building arrangement with wind conditions. Furthermore, the effects of urban planting and high-albedo surfacing on heat island reduction were evaluated based on the climatic analyses. Inside the urbanized area, the effects of urban planting and high-albedo surfacing are relatively large. But the effects of sea breeze are more important than those of planting and high-albedo surfacing in the coastal side. The mechanism that causes these differences was discussed by comparing the heat budgets in the four sub-domains set inside the urbanized area.
