A study of the effects of sky view factor on street pedestrians’ sensations & comforts against thermal environments and air qualities

作者：Siqi Wang, Shuangyan Feng, Shuang Liang, Yan Li, Hui Yin, Jian Zhang · 发表于：Journal of Engineering Research · 年份：2025 · DOI：10.1016/j.jer.2025.07.002 · 被引用次数：7 · 研究领域：Urban Heat Island Mitigation、Urban Green Space and Health、Noise Effects and Management

The intensification of global warming and air pollution has increased the threat of diseases such as heat stress and respiratory ailments. This study aims to optimise the thermal-PM 2.5 environment of urban outdoor spaces from the perspective of urban street space design. Using field measurements, questionnaire surveys, and statistical analysis, this research verified the impacts of the sky view factor (SVF) on sensations of outdoor thermal environment (OTE) and air quality (AIQ). Local pedestrians’ neutral points (the point that people are perceptive free) towards OTE and AIQ were 28.15°C (neutral temperature, NT) and 16.95㎍/m³ (neutral PM2.5 concentration, NPM 2.5 C). In addition, the NT decreased (27 – 24°C) as the SVF increase (0.1–0.7) while NPM 2.5 C increased (13–33 ㎍/m³) with that. People’s comforts were affected by both temperature and PM2.5 C, the increase of either of them would cause comfort level reduction. Finally, subjective perceptions on OTE and AIQ were interactively impactive, their NT decreased as the rise of PM2.5 C. The findings demonstrated that local pedestrians exhibit poor tolerance to heat in regions with a high SVF and/or atmosphere is more severely polluted. This paper helps urban planners enhance their understanding of thermal comfort, air quality perception and public health. Its findings expected to offer recommendations with significant reference value for urban design.