The Diurnal Cooling Effect of Green Space Structure on the Summer Urban Thermal Environment From a High-Resolution Perspective

文献类型： 外文期刊

第一作者： Wang, Shihao

作者： Wang, Shihao;Gu, Qingbao;Sun, Chaoyang;Huang, Lin;Shi, Huading;Liu, Hanbing;Xu, Xinliang;Han, Dongrui

作者机构：

关键词： Cooling; Urban areas; Atmospheric modeling; Vegetation mapping; Remote sensing; Spatial resolution; Land surface; Space heating; Data models; Numerical models; Climate simulation; landscape structure; urban green spaces (UGs); urban thermal environment

期刊名称：IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING （ 影响因子：5.3； 五年影响因子：5.6 ）

ISSN： 1939-1404

年卷期： 2024 年 17 卷

页码：

收录情况： SCI

摘要： Urban thermal environment (UTE) issue has reduced the quality of life for residents, and urban green spaces (UGs) can effectively improve the UTE. However, at a fine scale, the cooling capacity of UGs with different structures and the diurnal variation still require in-depth study. This article, based on land use, vegetation cover, ground elevation, anthropogenic heat emission, and meteorological data, utilizes the UrbClim model to simulate high-resolution hourly air temperature (Ta) in Tianjin's urban area during summer high-temperature days. It analyzes the structural characteristics of UGs at a fine scale and reveals the diurnal cooling effect variations among UGs with various structures. The results indicate that the Urban Heat Island (UHI) within Tianjin's urban area consists of a primary heat island and several smaller heat islands scattered around it. The northern part experiences higher Ta, while the southeastern part is cooler, with the highest daytime Ta ranging from 30.7 to 34.2 degrees C and the lowest nighttime Ta ranging from 26.0 to 31.7 degrees C. The structure of UGs significantly influences the spatial pattern and fluctuation of Ta. UGs with high coverage show a diminished cooling effect at night and can reduce the extent of daily Ta fluctuations, particularly when the greenery exceeds 80%, where the effect is most pronounced. The Ta stability of patchy and aggregated UGs is stronger than that of linear and scattered UGs. Vegetation types have different regulatory effects on diurnal Ta; during the day, trees have a more significant cooling effect than grasslands, while at night, this cooling effect is attenuated. Furthermore, the cooling benefits were amplified during extreme heat days. At the hottest time of the day, UGs with a high percentage of area, patchy and aggregated shape, and tree vegetation type have the best cooling effect, while at the coldest time of the night, these UGs slow down the dissipation of heat accumulated during the day and have a significant attenuation of the cooling effect. Our findings underscore the intricate relationships between the cooling effects and landscape structure of UGs, thereby aiding in the formulation of urban planning strategies to maximize the cooling benefits.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序