The Dynamics of Green Spaces and their Heat Island Cooling Effect in Guangzhou

Xiaohan Xie

doi:10.54097/cqrpjj71

Authors

Xiaohan Xie Suzhou Innovation Academy, Suzhou, 215131, China

DOI:

https://doi.org/10.54097/cqrpjj71

Keywords:

Urban green space, Urban heat island, Surface temperature, Cooling effect.

Abstract

Urban green spaces play a key role on mitigating surface urban heat island (SUHI). This study used Guangzhou China as the research region, based on multi-temporal LANDSAT remote sensing images from 2006 to 2025, the spatiotemporal evolution characteristics of urban green spaces were analyzed, and the cooling effect of this product on SUHI was quantitatively evaluated too. The result shows that the total area of urban green spaces was stable, while the spatial pattern tends to be fragmented. High-temperature areas were mainly distributed in the southern built-up area of the study region, and low-temperature areas were scattered in patches in the north. Besides, the average temperature in green areas is significantly lower than that in non-green areas, and significant differences were found among independent samples of green spaces temperature and non-green spaces temperature(P<0.001). Relevant analysis shows, there is a negative correlation between green space area and surface temperature (r=-0.282), but the linear model has a low fit. The study found that area contributes to cooling, while spatial configuration and landscape connectivity also significantly influence the cooling effect, and the distribution of urban heat islands is closely related to the fragmentation and spatial pattern of green spaces. The findings of this study can provide observational clues and basic data for subsequent more complex quantitative analyses.

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