日本ヒートアイランド学会

横山仁　Hitoshi YOKOYAMA　*1
足永靖信　Yasunobu ASHIE　*2
秋田寛己　Hiromi AKITA　*1*3
本條毅　Tsuyoshi HONJO　*4 

*1 防災科学技術研究所 National Research Institute for Earth Science and Disaster Resilience
*2 建築研究所 Building Research Institute
*3 現所属 長野大学 Nagano University
*4 千葉大学 Chiba University

概要

We measured thermal environment in a suburban plain forest in Tsukuba, Ibaraki Prefecture, during summer in 2022, and compared with in and outside forest. Inside forest, air temperature and globe temperature were lower and humidity was slightly higher than outside, but WBGT (Wet Bulb Globe Temperature) was lower. While the WBGT exceeded 31°C for 70% of the daytime hours outside forest, it never exceeded 31°C inside forest. There was a high correlation between solar radiation, air temperature, and the difference in WBGT inside and outside forest. The results of thermal environment measurements in Katsuragi Forest were generally similar to those of previous studies, suggesting that suburban plain forests, like green spaces such as parks, can be expected to have heat mitigation effects, such as reducing heatstroke.