Spatiotemporal patterns of the impact of surface roughness and morphology on urban heat island
Spatiotemporal patterns of the impact of surface roughness and morphology on urban heat island
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DOI：
10.1016/j.scs.2023.104513
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发表时间：
2023-03
影响因子：
11.7
通讯作者：
Haoran Hou;H. Su;Chuncheng Yao;Zhi-hua Wang
中科院分区：
文献类型：
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作者：
Haoran Hou;H. Su;Chuncheng Yao;Zhi-hua Wang
地表粗糙度和地表形态作为城市热环境的重要决定因素，已成为城市可持续发展的重要研究内容。在这项研究中，我们量化了城市粗糙度和形态对地表城市热岛（SUHI）强度及其时空格局的影响，在中国6个城市群的17个主要城市。我们采用多尺度数据集，并获得多个措施，代表城市形态的粗糙度和水平/垂直指标。结果表明，随着热岛强度的增加，城市形态指数与SUHI强度的相关性显著增强，表现为夏季（r= 0.59 ± 0.13）和冬季（r = 0.11 ± 0.35）的Pearson相关性。在一般情况下，使用不同的表面形态的措施评估的影响是一致的SUHI强度，而一维（1D）粗糙度出现作为一个足够的指标不劣于更复杂的形态参数。我们的研究还表明，城市形态的影响在不同的地理和气候区域，以及不同的城市管理，这突出了地方和特定地点的设计在实施有效的城市热缓解策略的重要性。
As important determinants of urban thermal environment, surface roughness and morphology have been extensively studied for sustainable urban development. In this study, we quantify the effect of urban roughness and morphology on the surface urban heat island (SUHI) intensity and its spatiotemporal patterns, over seventeen major cities in six urban agglomerations of China. We employ multisource dataset and derive multiple measures, representative of the roughness and horizontal/vertical indicators of urban morphology. The results show that the correlation between the SUHI intensity and urban morphological indices is significantly strengthened with the heat island intensity, manifested by the contrasting Pearson'srin summer (r= 0.59 ± 0.13) and winter (0.11 ± 0.35). In general, the impact assessed using different measures of surface morphology is consistent on the SUHI intensity, while the one-dimensional (1D) roughness emerges as an adequate index not inferior to more complex morphological parameters. Our study also shows that the impact of urban morphology varies in different geographic and climatic regions, as well as with different urban management, which highlights the importance of locality and site-specific design in implementing effective urban heat mitigation strategies.