Fundamental studies on restoring atmospheric environment by the mitigation of heat-island from the view point of landcover

这项研究由三个子项目组成。在第一个项目中，我们回顾了城市变暖的实际情况和影响。具体地说，研究了熊谷市的城市气候，以及热应激对人体和植物物候的影响。阐明了热岛强度随天气条件的不同而不同，城市变暖带来了热胁迫，加速了樱花的开花期或推迟了秋色的开花期。研究还表明，热应激与性别、年龄、人类活动等因素有关。在第二个项目中，研究了屋顶绿化对缓解热岛现象的影响。研究表明，屋顶绿化可以缓解城市热岛效应，其缓解速度取决于绿化面积的大小，而绿化面积的大小决定了一种显着温度。我们可以得出结论，与沥青或混凝土路面相比，SERACK(透水性)、ECOPLATE(含水性)等特殊路面材料更有利于潜热保温。

This study was consisting of three sub-projects. In the 1st project, we reviewed the actual conditions and effects of urban warming. Concretely speaking, the urban climate of Kumagaya City were researched, and the influences of the heat-stress on human body and plant phenology. It was clarified that the heat-island intensities varied with weather conditions and that the urban warming brought about heat-stress and hastening the flowering-date of cherry-blossom or slowing the date of autumn colors. It was also shown that heat-stress depends upon gender, age, human activity, etc.In the 2nd project, the studies about the effects of rooftop greening on the mitigation of heat-island phenomena were dealt with. It was made clear that the rooftop greening could mitigate the heat-island and that the mitigation rate depends upon the size of the greening area which could decide WBGT(a kind of sensible temperature).In the 3rd project, the ideal restoration of landcover for urban warming was studied from the view point of heat-balance. We could conclude that special pavement materials like SERACK(permeable), ECOPLATE(water-bearing), etc. are more useful for keeping cool by latent heat comparing with asphalt or concrete pavements.