Development of distribution map and validation of outdoor thermal index in Japan

本研究的目的是评估城市化地区的热舒适性分布。夏季在河边和街道街区的树木下进行了气候观测。结果表明：(1)白天城市建成区和农村地区的各项指标没有差异。从夜间到早晨，农村地区的数值高于建成区。(2)河边阳光充足的地方和路边树木的热舒适度指数较大。人们认为，这些环境并不总是有益于缓解热应激。(3)这是因为农村的相对湿度较高，计算出的指数与建成区一样高。在树荫下，建筑物附近的热舒适指数与路边的树木相似。(4)在阴凉处，由于白天建筑物的遮阳，建筑物附近的热舒适指数与河边相似。然而，由于交通繁忙和建筑物排出的废气，人们认为傍晚后的指数是所有环境中最高的。

The objective of this study is to evaluate the distribution of thermal comfort of the urbanized area. Climatic observations were conducted along the river side and under the trees in the street blocks in summer. The results are follows: (1) There was no difference of the index between the built-up area and the rural area in a city in the daytime. The values in the rural are higher than in the built-up area from night to morning. (2) Thermal comfort index is larger in the sunny place along the riverside and the roadside trees. It is considered that these environments are not always useful to mitigate the heat stress. (3) This occurred because the relative humidity is higher in the rural and the value of the index was calculated as high as in the built-up area. In the shade the thermal comfort index near the buildings resembled in the roadside trees. (4) In the shade the thermal comfort index near the buildings resembled in the riverside because of solar shading by buildings in the daytime. However it is considered that after evening the index was highest of all environments because of heavy traffic and the exhaust from the buildings.