[H-TT15] Geographic Information Systems and Cartography

[HTT15-P06] How do landscape patterns affect cooling intensity and scale? Evidence from 13 primary urban wetlands in China

Hao Hou², Yangyang yan², Yuji Murayama³, *Ruci Wang¹, Tangao Hu² (1.Center for Environmrntal Remote Sensing, Chiba University, 2.Hangzhou Normal University, 3.University of Tsukuba)

Keywords:cooling intensity, cooling scale, urban wetland, urban thermal environment, wetland spatial patterns

Urban wetlands are important blue–green spaces in cities and play a pivotal role in regulating local urban ecological environments and thermal conditions. However, despite their significance, studies on the cooling effects of urban wetlands and their influencing factors remain limited. This study used multi-ring buffer analysis and a random forest (RF) model to calculate the significant and potential cooling scales and intensities in urban wetlands. More specifically, we introduced four indicators, i.e., integrated patch diversity and proximity (IPDP), integrated wetland proximity and shape (IWPS), patch aggregation (PA), and logarithmic area (LA), to enhance urban wetland characteristic representation, and conducted correlation analyses to investigate their relationships with cooling effects. The results revealed significant cooling scale and cooling intensity ranges across the 13 urban wetlands. Similarly, the potential cooling scales varied from 10,284 to 44,408 m, with potential cooling intensities ranging from 0.35 to 1.81 °C. Notably, IWPS, number of patches (NP), and PA significantly influenced the cooling effects, whereas LA emerged as a critical factor affecting potential cooling effects. This study highlights the importance of urban wetlands in reducing urban thermal conditions and advances the understanding of their cooling effects.