Dynamic Evolution of Surface Urban Heat Island in Beijing

Abstract

With the development of the urbanization, the impact of urban heat island effect is becoming more and more severe. It is difficult to reveal the evolution of heat island dynamics based on statistical data, while the application of remote sensing data provides an effective method. Beijing City as study area, this paper analyzes the dynamics of summer land surface temperature in Beijing from 2005 to 2015, and reveals the significant urban heat island effect in Beijing based on the evolution law of land surface temperature along urban-rural gradient. After that, the dynamic evolution of urban heat island extent and its influence factors are explored in Beijing. The results show that the summer land surface temperature of Beijing in the past ten years shows an increasing trend, the land surface temperature gradually increases on the urban-rural gradient, indicating an obvious heat island effect. Meanwhile, the extent of urban heat island has expanded rapidly in the past ten years. On the township scale, building area, population and GDP all have significant positive effects on the land surface temperature while on the district scale, these correlations are not significant. This paper reveals the evolution law of urban heat island effect and its influencing factors in Beijing, which has a certain reference significance for the rational planning of urban space.