Department of Landscape Architecture and Urban Planning, Texas A&M University, College Station, TX 77843, USA.
Sci Total Environ. 2022 Feb 20;808:152143. doi: 10.1016/j.scitotenv.2021.152143. Epub 2021 Dec 3.
Cities have faced rapid urbanization, which has changed the impact of the micro-thermal environment on residents' thermal comfort level. Therefore, planners need to understand the city's physical environment so they can identify and ameliorate the effects of the changing in micro-thermal environment. Researchers also need to identify and understand pedestrians' thermal comfort level in street canyons to determine which urban physical factors planners need to improve. This study aimed to observe how thermal comfort affects pedestrian behavior in micro-thermal environments and to determine which urban geometry factors influence pedestrians' thermal comfort. This study collected data in downtown Austin, TX using a mobile weather station, and analyzed the microclimate conditions experienced by pedestrians. A camera mounted on the weather station also allowed us to observe pedestrian behavior patterns. The results revealed that pedestrians tended to choose walking, sitting, and standing locations with high thermal comfort levels such as in the shade on the sidewalk. There was also some correlation between thermal comfort levels and pedestrian behavior patterns. The sky view factor (SVF) and tree canopy coverage ratio (TCR) were also correlated with pedestrians' thermal comfort. This study highlights the need for future research to develop a data collection method for efficient microscopic thermal environment research and a thermal environment estimation and analysis approach from a three-dimensional perspective.
城市面临着快速的城市化，这改变了微热环境对居民热舒适水平的影响。因此，规划者需要了解城市的物理环境，以便识别和改善微热环境变化的影响。研究人员还需要识别和理解行人在街道峡谷中的热舒适水平，以确定规划者需要改善哪些城市物理因素。本研究旨在观察热舒适如何影响微热环境中的行人行为，并确定哪些城市几何因素影响行人的热舒适。本研究在德克萨斯州奥斯汀市中心使用移动气象站收集数据，并分析行人所经历的微气候条件。气象站上安装的摄像头还允许我们观察行人的行为模式。结果表明，行人倾向于选择具有高热舒适水平的行走、坐立和站立位置，例如人行道上的阴凉处。热舒适水平和行人行为模式之间也存在一定的相关性。天空视野系数（SVF）和树冠覆盖率（TCR）也与行人的热舒适有关。本研究强调了未来研究需要开发一种有效的微观热环境研究数据收集方法，以及从三维角度对热环境进行估计和分析的方法。
