Quantifying the effects of settlement size on urban heat islands in fairly uniform geographic areas
Quantifying the effects of settlement size on urban heat islands in fairly uniform geographic areas
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DOI：
10.1016/j.habitatint.2015.05.013
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发表时间：
2015-10
影响因子：
6.8
通讯作者：
M. Tan;Xiubing Li
中科院分区：
文献类型：
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作者：
M. Tan;Xiubing Li
城市规模与城市热岛强度(UHII)密切相关。为了更准确地检验这种关系，有必要通过在与研究区域相似的生物群中选择大平原上的聚落群来消除地形和气候差异对城市热岛的影响。本研究选取了1124个土地利用集群(城镇和大型农村居民点)，划分了周围的缓冲区，每个缓冲区的宽度等于集群的半径。结果表明，城市热岛指数随集群规模的增大而增大，其关系可用对数函数来描述。对于面积为2平方公里的集群，城市规模对夜间UHII变化的贡献率约为60%，对白天UHII变化的贡献率仅为30%左右。对于面积为2平方公里的集群，关系中的不确定性显著增加，关系变得非常弱。此外，我们的研究表明，白天的UHII高于夜间的UHII，特别是对于面积为10平方公里的大城市。
City size is closely related to urban heat island intensity (UHII). To examine the relationship more accurately, it is necessary to eliminate the effects of landforms and climatic differences on urban heat islands (UHIs), through selecting settlement clusters in a large plain within a similar biome as the study area. This study selected 1124 land use clusters (cities, towns, and big rural settlements) and demarcated surrounding buffer areas; each buffer width equaled the radius of the clusters. The results showed that UHI increased with growth in cluster size, and the relationship could be described using a logarithmic function. For clusters with an area >2 km2, the city size accounted for about 60% of the variance in UHII during the night and only about 30% during the day. For clusters with areas of <2 km2, the uncertainty in the relationship increased significantly and the relationship became very weak. In addition, our study showed that daytime UHII was higher than nighttime UHII, particularly for large cities with a size >10 km2.