Tree crown geometry and its performances on human thermal comfort adjustment

Trees play an important part in landscaping as well thermal environment adjustment. This study selected a satellite city of Sichuan Province China, Xindu, for field measurement about tree’s crown characteristics on their cooling performances five sunny summer days during August 2019. There were several parameters showing tree used, including canopying size (tree radius, TCR), geometry (the ratio TCR to trunk height, R/TH), site openness (sky view factor, SVF), and leaf density (leaf area index, LAI). It was found that R/TH had the most significant adjusting effects than others. The increase by 1 can reduce physiological equivalent temperature approximately 2.5 ​°C (R2 ​= ​0.8932) 2.65 ​0.8424) morning afternoon respectively. SVF LAI less effect due fact dense-leaf season. result provided good direction future landscape design towards microclimate