研究活動

2023年12月に，下記のとおり、論文発表（査読あり）を行いました。

発表会議：6th International Conference on Countermeasures to Urban Heat Islands

発表場所：ロイヤルメルボルン工科大学

 著者：タイトル他
Yukina Takayanagi, Minako Nabeshima, Li Xiongyu, Nishioka Masatoshi: Development of a Labeling System for Outdoor Cool Spots in Urbanized Areas: A study based on the thermal environment measurement results at bus stops in station squares, 6th International Conference on Countermeasures to Urban Heat Islands, pp. 672-681, 2023

＜抄録＞

In Osaka Prefecture, the number of heat stroke sufferers is increasing due to urban heat islands. As a countermeasure, the use and creation of "cool spots," where people feel cooler than in the surrounding area, are being promoted. This study aimed to establish an objective and quantitative evaluation system to facilitate the creation of more effective cool spots. This study examines whether cool spots can be ranked using the Wet Bulb Globe Temperature (WBGT) heat stroke index. A field survey was conducted in August 2022, and the results were analyzed using the difference between the Standard Effective Temperature (SET) and WBGT at the points with and without countermeasures. The results showed that the maximum difference between the points with and without countermeasures was 6.9 °C and 3.1 °C, respectively. In other words, the WBGT value was almost half of the SET difference, and SET can more clearly show differences between sites. In addition, a comparison of the difference between two data sets from the same location with different humidity environments (41% and 58%) with and without countermeasures showed that while SET indicated 36 °C in both cases, WBGT indicated approximately 28.8 °C and 30.5 °C, or 1.7 °C higher under the high-humidity environment. WBGT is thus appropriate for evaluating the risk of heat stroke due to humidity, which SET cannot express in a high-humidity environment. The results obtained in this study are beneficial in evaluating cool spots where mist spraying is employed and in assessing coolness in regions such as Southeast Asia, where high humidity is expected in the summer.

＜リンク＞

UHI2023