报告详情
Enhanced Cooling Efficiency of Urban Trees on Hotter Summer Days in 70 Cities of China
编号：104
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更新：2025-11-05 17:35:17 浏览：2次
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摘要
Increasing the urban tree cover percentage (TCP) is widely recognized as an efficient way to mitigate the urban heat
island effect. The cooling efficiency of urban trees can be either enhanced or attenuated on hotter days, depending on the
physiological response of urban trees to rising ambient temperature. However, the response of urban trees’ cooling
efficiency to rising urban temperature remains poorly quantified for China’s cities. In this study, we quantify the response
of urban trees’ cooling efficiency to rising urban temperature at noontime [~1330 LT (local time), LT=UTC+8] in 17
summers (June, July, and August) from 2003–19 in 70 economically developed cities of China based on satellite
observations. The results show that urban trees have stronger cooling efficiency with increasing temperature, suggesting
additional cooling benefits provided by urban trees on hotter days. The enhanced cooling efficiency values of urban trees
range from 0.002 to 0.055°C %−1 per 1°C increase in temperature across the selected cities, with larger values for the low
TCP-level cities. The response is also regulated by background temperature and precipitation, as the additional cooling
benefit tends to be larger in warmer and wetter cities at the same TCP level. The positive response of urban trees’ cooling
efficiency to rising urban temperature is explained mainly by the stronger evapotranspiration of urban trees on hotter days.
These results have important implications for alleviating urban heat risk by utilizing urban trees, particularly considering
that extreme hot days are becoming more frequent in cities under global warming.
关键词
urban trees,cooling efficiency,evapotranspiration,urban heat,hot days
报告人
Limei Yang
Phd Student Nanjing University稿件作者
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重要日期
-
会议日期
11月20日
2025
至11月24日
2025
-
11月10日 2025
初稿截稿日期
-
11月24日 2025
注册截止日期
主办单位
太平洋科学协会
承办单位
Shantou University
Xiamen University
Xiamen University
联系方式
- Prof. Ping Li
- ps******@stu.edu.cn
- 86-*********
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