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Spatial distribution and driving force analysis of urban heat island effect based on raster data: A case study of the Nanjing metropolitan area, China

2019; Elsevier BV; Volume: 50; Linguagem: Inglês

10.1016/j.scs.2019.101637

2210-6715

Min Min, Chen Lin, Xuejun Duan, Zhifeng Jin, Luocheng Zhang,

Land Use and Ecosystem Services

Human activities do not only change the land use/land cover (LULC), but also release a large amount of anthropogenic heat through intensive activities above ground, which drives the formation of urban heat island (UHI). This study used the Nanjing metropolitan area as the research area and taken 2017 as the observation time and chosen land surface characteristic parameters, point of interest (POI) density and urban functional area data to quantify the driving mechanism of human activities at a grid scale. The results indicated as follows: i) The response relationships between the LST and its driving factors have a clear scale effect at the grid scale. The driving factors had the highest explanatory power at the 300 m grid; ii) LULC had a significant effect on LST, impervious layers and bare soil increased the LST, vegetation and water relieved it; iii) In different urban functional areas, the relationship between LST and POI density was piecewise. In addition to density, the types of human activities also have a significant impact on the UHI, in which industrial heat release has the most significant effect on the local temperature of the city, followed by daily heat production and transportation heat release.