Analysis of urban heat island effect based on remote sensing monitoring of ground objects changed

Abstract

Satellite remote sensing has been widely used for urban expansion analysis and land cover change monitoring due to its advantages of large coverage and short revisit cycle. With the rapid development of urban construction, urban heat island effect becomes more obvious. It is of great significance to use remote sensing technology to monitor urban temperature and analyze the internal causes of heat island effect. Zhengzhou was selected as a case study, and uses remote sensing images from March and September 2020-2022 to invert the temperature of this area. After separating the temperature changes caused by normal climate, the influence of land cover type changes on heat island effect is analyzed by interpreting and comparing different land cover types. The results show that land cover type changes have an important impact on urban heat island effect. The distribution of vegetation and water bodies can alleviate the rise of urban surface temperature to some extent, while high-density built-up areas have more significant surface temperature increase. However, through comparative studies of remote sensing images, it is found that light-colored building materials with high reflectivity have obvious improvement on urban heat island effect.

The Impact of Architectural Layout on Urban Heat Island Effect: A Thermodynamic Perspective

“…As the process of urbanization accelerates, the phenomenon of the UHI effect has become increasingly prominent, exerting profound impacts on urban climate, residents' comfort, and energy consumption [1,2]. The UHI effect refers to the significant increase in temperature in urban center areas compared to suburban areas, caused by heat emitted from human activities and dense urban buildings [3][4][5][6].…”