Department of Urban Development, University of Taipei, Taiwan.
Environ Res. 2021 May;196:110424. doi: 10.1016/j.envres.2020.110424. Epub 2020 Nov 5.
Climate change and the rapid expansion of the built environment have intensified heat stress worldwide. Due to environmental changes and urbanization, some studies show evidence of spatial and temporal changes in heat stress. The objective of this study is to apply spatial analysis to explore temporal and spatial changes in heat stress and to conduct a comparative analysis of land surface temperature (LST) and land use. The results show a significant expansion of the areas where the LST is over 35 °C or between 30 °C and 35 °C. A comparative analysis between the expansion of areas with high LSTs and changing land use types shows that LSTs were indeed higher in 2014 than the values in 2008 and that LSTs remained relatively high in areas where the LST was over 35 °C or between 30 °C and 35 °C. The temperature variation is not significant between urban and rural areas, indicating that heat stress has been extended toward particular rural areas. The cooling effect provided by open space is not significant, so city planners should exert more effort to mitigate extreme heat stress. As a whole, heat stress does change temporally and spatially, and the results of the comparative analysis could be further referenced in future efforts to improve the ability of areas to adapt to heat stress based on various land use patterns.
气候变化和快速扩张的城市环境使全球范围内的热应激加剧。由于环境变化和城市化，一些研究表明热应激存在时空变化的证据。本研究的目的是应用空间分析方法来探索热应激的时空变化，并对地表温度（LST）和土地利用进行对比分析。结果表明，LST 超过 35°C 或在 30°C 到 35°C 之间的地区显著扩张。高 LST 地区扩张与土地利用类型变化的对比分析表明，2014 年的 LST 确实高于 2008 年的值，而且 LST 仍在超过 35°C 或在 30°C 到 35°C 之间的地区保持相对较高的水平。城乡之间的温度变化不明显，表明热应激已经扩展到特定的农村地区。开放空间提供的降温效果并不显著，因此城市规划者应该更加努力地缓解极端热应激。总的来说，热应激确实在时间和空间上发生了变化，对比分析的结果可以为未来基于各种土地利用模式的改善热应激适应能力的努力提供进一步参考。
