The Analysis of the Spatio-temporal Evolution of the Heat Island Effect and its Influencing Factors in Huadu District, Guangzhou

This study aims to explore the urban heat island intensity and change characteristics of Huadu District, Guangzhou. Landsat 8 was used as the data source, and an atmospheric transmission model was used to invert the surface temperature of Huadu District, Guangzhou, in winter 2013 and 2021, extract the urban core area, and divide the heat island effect area. The results show that the urban heat island of Huadu District in Guangzhou has changed greatly in 2021. Compared with 2013, the proportion of low-temperature areas and sub-low temperature areas in urban areas has decreased in 2021, while the high-temperature area, sub-low temperature area, and middle-temperature area have increased. In terms of space, the high-temperature area of Huadu District, Guangzhou, is mainly distributed in the built-up area in the south and north of the city; the sub-low temperature area is distributed on the edge of the built-up area; the medium-temperature area occupies most of the district of Huadu District, distributed in the city's central area and the edge of the low-temperature area; and the low-temperature area is distributed in the water body and dense vegetation area.