Analyzing the Relationship Between Green Coverage and Urban Heat Island Effect

Abstract

Against the backdrop of global climate change and rapid urbanization worldwide, the urban heat island (UHI) effect has evolved into a severe environmental hazard that endangers public health and increases urban energy demand. The urban heat island effect refers to the phenomenon in which urban areas are significantly hotter than surrounding rural areas, caused by massive impermeable buildings and shrinking natural vegetation. Green areas, including parks, forests, street trees, lawns, and rooftop gardens, play an important role in regulating the urban microclimate and easing heat accumulation. This paper studies the relationship between regional green coverage rate and the urban heat island effect. We collect regional green coverage and surface temperature data through remote sensing images and field temperature monitoring, and use correlation analysis to quantify their interactive relationship. The analytical results reveal that higher regional green coverage correlates significantly with reduced land surface temperature and weakened UHI intensity. Green spaces cool the environment mainly through shading, evapotranspiration, and improved air circulation. The findings of this study provide useful evidence and practical suggestions for urban planning and sustainable development, helping cities become cooler, greener, and more livable in the future while responding to global warming challenges.