Quantifying the Cooling Effect of Urban Greening Driven by Ecological Restoration Projects in China

IF 10.8 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

环境科学与技术 Pub Date : 2024-11-16 DOI:10.1021/acs.est.4c10314

Dong Xu, Tingting Bai, Lin Yang, Yuyu Zhou, Bin Chen, Haifeng Xu, Yongze Song, Yuan Yuan, Yuanzheng Cui, Meng Lin, Ziqian Xia, Min Chen, Zhenci Xu, Peng Zhao, Guihua Dong, Lei Zhang, Jiacheng Zhao, Wanben Wu, Wei Wang, Zhao Liu, Jie Cheng, Philippe Ciais

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Abstract

Urban greening (UG) affects local climate by altering surface energy balance, while long-term UG cooling potential, patterns, and contribution to curbing urban warming remain unclear. Here, we designed an novel statistical model to evaluate the cooling potential of UG (CPUG) and created the first CPUG map for China. By exploring the trends in observed and simulated urban surface temperatures (UST), we quantified the CPUG of 0.20 K over the past two decades, which slowed down the warming trend by 14.17% in Chinese cities. We found that the CPUG varied significantly between the urban core and sprawl areas. Specifically, the CPUG in the urban core was approximately 1.01 K, and it contributed to curbing urban warming by 56.08%, which was more than 7.2 times higher than in the sprawl areas, where the CPUG was only 0.14 K and contributed to curbing urban warming by 9.93%. We further revealed that urbanization and major ecological restoration projects are the key factors influencing CPUG, emphasizing the need for anthropogenic vegetation management to curb urban warming. The proposed model in this study provides a powerful tool for quantitatively assessing the impact of long-term UG trends on urban warming. The results of the study are an important reference for building climate-adaptive cities.

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量化中国生态修复项目带动的城市绿化降温效应

城市绿化（UG）通过改变地表能量平衡影响当地气候，但长期的城市绿化降温潜力、模式以及对遏制城市变暖的贡献仍不清楚。在此，我们设计了一个新颖的统计模型来评估城市绿化的降温潜力（CPUG），并绘制了中国第一张CPUG地图。通过探索观测和模拟的城市地表温度（UST）的变化趋势，我们量化了过去二十年中 0.20 K 的 CPUG，它使中国城市的变暖趋势减缓了 14.17%。我们发现，CPUG 在城市核心区域和扩张区域之间存在显著差异。具体而言，城市核心区的 CPUG 约为 1.01 K，对遏制城市变暖的贡献率为 56.08%，是无计划扩展区的 7.2 倍多；无计划扩展区的 CPUG 仅为 0.14 K，对遏制城市变暖的贡献率为 9.93%。我们进一步发现，城市化和重大生态修复工程是影响 CPUG 的关键因素，强调了人为植被管理对遏制城市变暖的必要性。本研究提出的模型为定量评估城市植被长期趋势对城市变暖的影响提供了有力的工具。研究结果对建设气候适应型城市具有重要的参考价值。

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

环境科学与技术环境科学-工程：环境

CiteScore

17.50

自引率

9.60%

发文量

12359

审稿时长

2.8 months

期刊介绍： Environmental Science & Technology (ES&T) is a co-sponsored academic and technical magazine by the Hubei Provincial Environmental Protection Bureau and the Hubei Provincial Academy of Environmental Sciences. Environmental Science & Technology (ES&T) holds the status of Chinese core journals, scientific papers source journals of China, Chinese Science Citation Database source journals, and Chinese Academic Journal Comprehensive Evaluation Database source journals. This publication focuses on the academic field of environmental protection, featuring articles related to environmental protection and technical advancements.