We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Pairwise‐Interaction Model Unifies Different Asymptotic Shapes of UHI Intensity.
- Authors
Li, Yunfei; Ribeiro, Fabiano L.; Zhou, Bin; Rybski, Diego
- Abstract
City size is a primary determinant of the urban heat island (UHI) intensity, with its effects further nuanced by the urban form. But how to factor in the urban form into the UHI assessment remains unresolved. We propose an every‐pair‐interaction model that meaningfully incorporates urban size and fractal dimension to characterize the UHI intensity. Regression on the summertime surface UHI intensity of 5,000 European cities shows that the model outperforms the simple linear combination of logarithmic size and fractal dimension. Subject to the interplay between the range of the every‐pair interaction and the urban fractal shape, the model also represents a generalization as it includes power‐law, logarithmic, and saturating size dependence of UHI—all three possibilities have been reported empirically in the literature. Our theoretical framework indicates that the surface UHI intensity saturates with urban size, opening up new research perspectives around UHI intensity. Plain Language Summary: City size is an important determinant of the urban heat island (UHI) intensity. While most studies report a logarithmic dependence of UHI intensity on city size, other functions like power‐law and logistic functions have also been reported. In addition, the urban form plays an important role and, intuitively, increased UHI intensity is expected for compact cities. However, how to incorporate urban size and form for modeling UHI is less clear. Based on the perception that every urban site interacts with every other one, whereas the intensity of interaction decreases with the distance, we propose an every‐pair‐interaction model to characterize the UHI intensity. The model combines urban size and fractal dimension non‐linearly and outperforms the simple linear model. It also represents a generalization of the three functional possibilities reported in the literature. Our model indicates that the surface UHI intensity saturates with urban size. Whether the UHI saturates with the expansion of the urban area or follows a continuously increasing trend is relevant for sustainable urban development. Our approach paves the way for fresh research avenues into UHI intensity and urban climate as a whole. Key Points: We propose an every‐pair interaction model that unifies urban size and fractal dimension to model surface urban heat island (UHI) intensityThe model outperforms multi‐linear models and is a generalization of three functional shapes of the size dependence of surface UHI intensityThe empirical results in combination with our theoretical framework indicate that the surface UHI intensity saturates with urban size
- Subjects
URBAN heat islands; FRACTAL dimensions; CITIES &; towns; URBAN climatology; GENERALIZATION
- Publication
Geophysical Research Letters, 2024, Vol 51, Issue 16, p1
- ISSN
0094-8276
- Publication type
Article
- DOI
10.1029/2024GL109516