The impact of urban land use changes on the urban heat island effect:a case study of Nanjing
Given the complexity of the impact of land use on the urban heat island effect,taking the main urban area of Nanjing as the study area,using Landsat 8 visible and near-infrared data to extract land use types and retrieve land surface temperatures from thermal infrared data.Buffer zone analysis was employed to investigate the spatial distribution and trends of land use and urban heat island effect.The Geodetector was used to quantify the influence of land use on the urban heat island effect.The results are as follows:①heat island intensity is greater south of the Yangtze River,with significant effects around transportation hubs and industrial parks.From 2014 to 2022,the heat island shifted and expanded towards the urban fringe.②From 2014 to 2022,the increase of impervious surface and forests in the study area is 6.1％and 3.0％,while water bodies and cropland-grasslands decreased by 0.2％and 9.0％.The expansion of impervious surfaces mainly encroached on arable cropland-grasslands.③The interaction of land use types had a greater driving force on the urban heat island effect than any single type,with impervious surfaces having the most significant impact.These findings can provide auxiliary information for land use planning in the construction of Nanjing as a'Beautiful Ancient Capital'.
urban heat islandland usegeodetectorland surface temperature
万方数据
