Quantifying the cooling benefits driven by global urban tree cover restoration

IF 5.4 2区地球科学 Q1 GEOGRAPHY

Applied Geography Pub Date : 2025-09-26 DOI:10.1016/j.apgeog.2025.103798

Feng Liu , Lunche Wang , Qian Cao , Jun Gao , Zixin Zhang , Jia Sun

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引用次数: 0

Abstract

Rapid urbanization has triggered changes in land use patterns, reshaping the surface energy balance and vegetation functions, and resulting in significant spatiotemporal heterogeneity in vegetation cooling effects. However, there is still a lack of systematic understanding of the spatiotemporal dynamics of the cooling effect driven by urban vegetation restoration and its climate adaptation mechanisms. This study quantified the spatiotemporal dynamic patterns of tree cooling efficiency (TCE) in 1113 global cities from 2000 to 2020 and revealed the interactive regulation and threshold effects of climate context and vegetation biophysical characteristics on TCE. The results show that approximately 68 % of the 1113 cities worldwide exhibit an increasing trend in tree cover, with an average cooling efficiency of 0.138 °C/%, resulting in an average cooling benefit of 1.586 °C. Affected by differences in vegetation characteristics and climate background, the temperature mitigation effects of trees in different cities vary significantly. TCE is higher in tropical arid urban environments, while the cooling benefits are more pronounced in temperate and cold urban areas. By revealing the spatiotemporal differences in urban tree cooling effects and their climate adaptability worldwide, this analysis emphasizes the dynamic nature of TCE and the importance of continuous monitoring for the effective formulation of regional climate-resilient greening strategies.

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量化全球城市树木覆盖恢复带来的降温效益

快速城市化引发了土地利用格局的变化，重塑了地表能量平衡和植被功能，导致植被降温效应呈现明显的时空异质性。然而，对城市植被恢复降温效应的时空动态及其气候适应机制仍缺乏系统的认识。本研究量化了2000 - 2020年全球1113个城市树木降温效率的时空动态格局，揭示了气候背景和植被生物物理特征对树木降温效率的交互调节和阈值效应。结果表明，在全球1113个城市中，约68%的城市树木覆盖率呈增加趋势，平均降温效率为0.138℃/%，平均降温效益为1.586℃。受植被特征和气候背景差异的影响，不同城市树木的降温效果差异较大。在热带干旱的城市环境中，TCE较高，而在温带和寒冷的城市地区，冷却效益更为明显。通过揭示全球范围内城市树木降温效应及其气候适应性的时空差异，强调了城市树木降温效应的动态性质以及持续监测对有效制定区域气候适应型绿化战略的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Geography GEOGRAPHY-

CiteScore

8.00

自引率

2.00%

发文量

134

期刊介绍： Applied Geography is a journal devoted to the publication of research which utilizes geographic approaches (human, physical, nature-society and GIScience) to resolve human problems that have a spatial dimension. These problems may be related to the assessment, management and allocation of the world physical and/or human resources. The underlying rationale of the journal is that only through a clear understanding of the relevant societal, physical, and coupled natural-humans systems can we resolve such problems. Papers are invited on any theme involving the application of geographical theory and methodology in the resolution of human problems.