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Intra-urban spatial heterogeneity significantly influences outdoor thermal comfort and urban heat island (UHI) intensity across distinct urban zones. This study develops a localized climate zone (LCZ) classification framework and investigates the local climate heterogeneity by on-site measurements. High-temporal-resolution near-surface temperature data were acquired through mobile measurements using bicycle-mounted sensors during summer. A systematic sampling protocol encompassing 105 georeferenced locations was implemented, combining 5-min stationary solar exposure measurements with fixed reference sensors deployed in tree-shaded areas for calibration. We also derived urban morphological indicators, including Sky View Factor (SVF), Artificial material View Factor (AVF), Vegetation View Factor (VVF), and Pervious Surface Fraction (PSF), through digital image processing of hemispherical photographs to explore their effects on local climate. The spatiotemporal thermal maps derived from field measurements demonstrated variations in the timing of Daily Maximum Temperatures, highlighting shifts in heat stress distribution over time, with ΔTa differentials exceeding 3.09 °C between exposed and vegetated zones. Pearson correlation analysis revealed significant relationships between urban geometry and thermal indices: SVF (r =  +0.251, p < 0.01) and BD (r =  +0.272, p < 0.01) showed positive correlations with air temperature (Ta), while VVF (r = –0.301, p < 0.01) and PSF (r = –0.240, p < 0.05) demonstrated negative correlations, indicating cooling effects. Comparative analysis of calibrated temperature anomalies (ΔTa) across LCZ types revealed statistically significant disparities (p < 0.024), highlighting the thermal mitigation potential by LCZ strategy. The findings highlight the importance of field measurements and emphasize the role of three-dimensional urban morphology in climate-responsive design, offering empirical insights into outdoor thermal conditions and enhancement strategies for urban built environment renovation.

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Study on Summer Outdoor Thermal Environment in Different Local Climate Zones: On-Site Measurements in Shenzhen Coastal Areas

  • 会议论文

  • 发表日期：

    2026年

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  • Jing Jin,
  • Meng Tian,
  • Lei Yuan

摘要

Intra-urban spatial heterogeneity significantly influences outdoor thermal comfort and urban heat island (UHI) intensity across distinct urban zones. This study develops a localized climate zone (LCZ) classification framework and investigates the local climate heterogeneity by on-site measurements. High-temporal-resolution near-surface temperature data were acquired through mobile measurements using bicycle-mounted sensors during summer. A systematic sampling protocol encompassing 105 georeferenced locations was implemented, combining 5-min stationary solar exposure measurements with fixed reference sensors deployed in tree-shaded areas for calibration. We also derived urban morphological indicators, including Sky View Factor (SVF), Artificial material View Factor (AVF), Vegetation View Factor (VVF), and Pervious Surface Fraction (PSF), through digital image processing of hemispherical photographs to explore their effects on local climate. The spatiotemporal thermal maps derived from field measurements demonstrated variations in the timing of Daily Maximum Temperatures, highlighting shifts in heat stress distribution over time, with ΔTa differentials exceeding 3.09 °C between exposed and vegetated zones. Pearson correlation analysis revealed significant relationships between urban geometry and thermal indices: SVF (r =  +0.251, p < 0.01) and BD (r =  +0.272, p < 0.01) showed positive correlations with air temperature (Ta), while VVF (r = –0.301, p < 0.01) and PSF (r = –0.240, p < 0.05) demonstrated negative correlations, indicating cooling effects. Comparative analysis of calibrated temperature anomalies (ΔTa) across LCZ types revealed statistically significant disparities (p < 0.024), highlighting the thermal mitigation potential by LCZ strategy. The findings highlight the importance of field measurements and emphasize the role of three-dimensional urban morphology in climate-responsive design, offering empirical insights into outdoor thermal conditions and enhancement strategies for urban built environment renovation.