Spatial–Temporal Changes and Influencing Factors of Surface Temperature in Urumqi City Based on Multi-Source Data

摘要

Surface temperature is one of the most basic requirements for the biosphere’s existence on earth. Hence, toevaluate urban ecoenvironmental quality, investigating the characteristics of the spatial and temporal surfacetemperature is essential. In this study, multisource spatial data were used to invert Urumqi’s surface temperatureover a large time span. Characteristics of spatial pattern of the surface temperature were quantitatively analyzedusing a spatial autocorrelation and standard deviation ellipse. A geo-detector model was used to determine thecorrelation between the surface temperature and 10 influencing factors. Urumqi’s surface temperature exhibiteda significant geographical heterogeneity from 2000 to 2019, such that a clear heat island effect was observed inthe city. From 2000 to 2010, sub-high temperature, high temperature, and severe high-temperature centroidschanged 30 to the northwest; whereas from 2010 to 2019, the temperature centroid shifted 13 to the southwest.Among all the factors, the impervious surface has greatest impact on the urban heat island effect inUrumqi. The relationship between the impervious surface and other parameters was the most visible in theinteraction detection. In the different land use categories, building land exhibited the highest average surfacetemperature. Compared with other studies, this study considers the influence of natural and human factors onurban heat island effect more comprehensively, and also quantitatively analyzes the difference of different landuse types on urban heat island effect, which makes up for the defects of previous qualitative analysis.