城市绿地形态和植被组成对季节地表温度的影响——以北京城市核心区为例

IF 6 2区工程技术 Q1 ENVIRONMENTAL SCIENCES

Urban Climate Pub Date : 2025-03-01 DOI:10.1016/j.uclim.2025.102367

Xiaoting Sun , Panfei Fang , Shaodong Huang , Yuying Liang , Jia Zhang , Jia Wang

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引用次数: 0

摘要

城市绿地通过降低地表温度，在缓解城市热岛效应方面发挥着至关重要的作用。本研究利用Landsat 8数据和城市绿地调查数据，应用辐射传输方程（RTE）和增强回归树（BRT）模型，分析了绿地形态和植被组成对地表温度（LST）的影响。结果表明，全年绿地面积百分比对地表温度的影响最大。在夏季和冬季，最大斑块指数（LPI）、平均斑块大小（MPS）和边缘密度（ED）等附加形态因子也发挥重要作用。在春、夏、秋、冬分别超过34.5%、44.5%、39.6%和37.4%的阈值时，存在降温效应，但降温效应随温度升高而减弱。在所有季节，树木对地表温度降低的贡献最大，夏季（66.8%）和秋季（65.7%）的影响尤其强烈。通过战略规划和植被类型平衡来优化城市绿地设计，可以显著增强温度调节，降低城市热岛效应，提高城市生态质量。

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Impact of urban green space morphology and vegetation composition on seasonal land surface temperature: a case study of Beijing's urban core

Urban green spaces play a crucial role in mitigating the Urban Heat Island (UHI) effect by cooling surface temperatures. This study used Landsat 8 data and urban green space surveys, applying Radiative Transfer Equation (RTE) and Boosted Regression Tree (BRT) models to analyze how green space morphology and vegetation composition influence land surface temperature (LST) across seasons. Results show that the percentage of green space area (PLAND) has the greatest impact on LST year-round. In summer and winter, additional morphological factors, such as Largest Patch Index (LPI), Mean Patch Size (MPS), and Edge Density (ED), also play important roles. A cooling effect is observed when PLAND exceeds thresholds of 34.5 % in spring, 44.5 % in summer, 39.6 % in autumn, and 37.4 % in winter, though the effect diminishes with further increases. Trees provide the highest contribution to LST reduction in all seasons, with particularly strong effects in summer (66.8 %) and autumn (65.7 %). Optimizing urban green space design through strategic planning and a balance of vegetation types can significantly enhance temperature regulation, reduce UHI effects, and improve urban ecological quality.

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来源期刊

Urban Climate Social Sciences-Urban Studies

CiteScore

9.70

自引率

9.40%

发文量

286

期刊介绍： Urban Climate serves the scientific and decision making communities with the publication of research on theory, science and applications relevant to understanding urban climatic conditions and change in relation to their geography and to demographic, socioeconomic, institutional, technological and environmental dynamics and global change. Targeted towards both disciplinary and interdisciplinary audiences, this journal publishes original research papers, comprehensive review articles, book reviews, and short communications on topics including, but not limited to, the following: Urban meteorology and climate[...] Urban environmental pollution[...] Adaptation to global change[...] Urban economic and social issues[...] Research Approaches[...]