Presentation Details
Enhanced Cooling Efficiency of Urban Trees on Hotter Summer Days in 70 Cities of China
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Updated Time：2025-11-05 17:35:17 Hits：98
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Abstract
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.
Keywords
urban trees,cooling efficiency,evapotranspiration,urban heat,hot days
Speaker
Limei Yang
Phd Student Nanjing UniversitySubmission Author
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Important Date
-
Conference Date
Nov 20
2025
toNov 24
2025
-
Nov 10 2025
Draft paper submission deadline
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Nov 24 2025
Registration deadline
Sponsored By
The Pacific Science Association
Organized By
Shantou University
Xiamen University
Xiamen University
Contact Information
- Prof. Ping Li
- ps******@stu.edu.cn
- 86-*********
Previous Conferences
-
2015-11-02 Iran, Islamic Republic of
2015 30th International Power System Conference (PSC)
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