Analysis of Spatiotemporal Characteristics of Urban Heat Island (HUI) Effect in Shantou City based on Landsat Images

With the continuous strengthening of China's economic strength and the acceleration of urbanization, a series of urban ecological problems have also emerged, among which Urban Heat Island (UHI) is one of the more serious issues. This article takes Shantou City as the research object, based on Landsat series satellite images, uses the radiative transfer equation algorithm (atmospheric correction method) to invert the surface temperature of Shantou City, and uses the mean standard deviation method to classify the heat island effect of surface temperature. The results indicate that the area of UHI effect in Shantou is continuously increasing, and there is a phenomenon of transition from low-temperature areas to high-temperature areas. From 2008 to 2021, the UHI area in Shantou exhibited a spatiotemporal variation pattern of scattered, contiguous, and diffusive transfer.