Takebayashi Hideki, Maeda Nao
Department of Architecture, Graduate School of Engineering, Kobe University, Rokkodai 1-1, Nada, Kobe, Hyogo, 657-8501, Japan.
Sci Rep. 2024 Mar 11;14(1):5914. doi: 10.1038/s41598-024-56458-8.
For the Osaka-Kansai Expo, to be held from April to October 2025, it is necessary to manage the exhibition site with consideration for countermeasures against heat in order to make safe and active use of the outdoor space. In this study, we compared meteorological data observed at Expo site on the sea coast, and at the Osaka Meteorological Observatory in the city center to analyze the quantitative relationship between meteorological elements at both locations, calculated thermal environment indices using these meteorological data, and considered the effects of implementing adaptation measures against the heat. The effect of solar radiation shading is predominant in lowering SET* and WBGT. During the medium temperature period, before mid-June and after mid-September, solar radiation shading avoids uncomfortable conditions, and during the high temperature period, from late June to mid-July and mid-August to early September, solar radiation shading, surface cover improvement, and mist spraying reduce the risk of heat stroke. However, during the extremely hot period, from late July to early August, the risk of heat stroke cannot be avoided by any of the adaptation measures to heat.
对于将于2025年4月至10月举办的大阪-关西世博会，为了安全且积极地利用户外空间，有必要在管理展览场地时考虑防暑对策。在本研究中，我们比较了在海岸边的世博园区以及市中心的大阪气象观测站观测到的气象数据，以分析两地气象要素之间的定量关系，利用这些气象数据计算热环境指数，并考虑实施防暑适应措施的效果。遮阳对降低标准有效温度（SET*）和湿球黑球温度（WBGT）的效果最为显著。在中等温度时期，即6月中旬之前和9月中旬之后，遮阳可避免出现不适状况；在高温时期，即6月下旬至7月中旬以及8月中旬至9月初，遮阳、改善地表覆盖和喷雾可降低中暑风险。然而，在酷热时期，即7月下旬至8月初，任何防暑适应措施都无法避免中暑风险。
