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首页> 外文期刊>ISPRS Journal of Photogrammetry and Remote Sensing >Investigating the effects of 3D urban morphology on the surface urban heat island effect in urban functional zones by using high-resolution remote sensing data: A case study of Wuhan, Central China
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Investigating the effects of 3D urban morphology on the surface urban heat island effect in urban functional zones by using high-resolution remote sensing data: A case study of Wuhan, Central China

机译：高分辨率遥感数据研究了3D城市形态对城市功能区地表城市热岛效应的影响 - 以中国武汉为例

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摘要

The Urban heat island (UHI) effect is an increasingly serious problem in urban areas. Information on the driving forces of intra-urban temperature variation is crucial for ameliorating the urban thermal environment. Although prior studies have suggested that urban morphology (e.g., landscape pattern, land-use type) can significantly affect land surface temperature (LST), few studies have explored the comprehensive effect of 2D and 3D urban morphology on LST in different urban functional zones (UFZs), especially at a fine scale. Therefore, in this research, we investigated the relationship between 2D/3D urban morphology and summer daytime LST in Wuhan, a representative megacity in Central China, which is known for its extremely hot weather in summer, by adopting high-resolution remote sensing data and geographical information data. The "urban morphology" in this study consists of 2D urban morphological parameters, 3D urban morphological parameters, and UFZs. Our results show that: (1) The LST is significantly related to 2D and 3D urban morphological parameters, and the scattered distribution of buildings with high rise can facilitate the mitigation of LST. Although sky view factor (SVF) is an important measure of 3D urban geometry, its influence on LST is complicated and context-dependent. (2) Trees are the most influential factor in reducing LST, and the cooling efficiency mainly depends on their proportions. The fragmented and irregular distribution of grass/shrubs also plays a significant role in alleviating LST. (3) With respect to UFZs, the residential zone is the largest heat source, whereas the highest LST appears in commercial and industrial zones. (4) Results of the multivariate regression and variation partitioning indicate that the relative importance of 2D and 3D urban morphological parameters on LST varies among different UFZs and 2D morphology outperforms 3D morphology in LST modulation. The results are generally consistent in spring, summer and autumn. These findings can provide insights for urban planners and designers on how to mitigate the surface UHI (SUHI) effect via rational landscape design and urban management during summer daytime.
机译：城市热岛（UHI）效应是城市地区日益严重的问题。有关城市内温度变化的驱动力的信息对于改善城市热环境至关重要。尽管事先研究表明，城市形态（例如，景观模式，土地使用型）可以显着影响土地表面温度（LST），但很少有研究探索了不同城市功能区的LST上的2D和3D城市形态的综合效果（ UFZS），特别是在尺度上。因此，在本研究中，我们调查了武汉的2D / 3D城市形态和夏季白天LST的关系，这是中国中部代表性的兆特征，通过采用高分辨率的遥感数据，以其极其炎热的天气而闻名地理信息数据。本研究中的“城市形态”由2D城市形态参数，3D城市形态学参数和UFZ组成。我们的研究结果表明：（1）LST与2D和3D城市形态参数显着相关，高层建筑物的分散分布可以促进LST的减轻。虽然天空视图因子（SVF）是3D城市几何的重要衡量标准，但其对LST的影响是复杂且背景上的。 （2）树是减少LST最有影响力的因素，冷却效率主要取决于其比例。草/灌木的碎片和不规则分布也在减轻LST方面发挥着重要作用。 （3）关于UFZ，住宅区是最大的热源，而LST最高出现在商业和工业区。 （4）多变量回归和变化分区的结果表明，2D和3D城市形态参数对LST的相对重要性在LST调制中不同的UFZ和2D形态而变化。结果通常在春季，夏季和秋季一致。这些调查结果可以为城市规划者和设计师提供如何通过理性景观设计和城市管理在夏季白天通过理性景观设计和城市管理来减轻表面uhi（苏海）的影响。

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