The canopy layer urban heat island (UHI) effect, as manifested by elevated near-surface air temperatures in urban areas, exposes urban dwellers to additional heat stress in many cities, specially during heat waves. We simulate the urban climate of various generated cities under the same weather conditions. For mono-centric cities, we propose a linear combination of logarithmic city area and logarithmic gross building volume, which also captures the influence of building density. By studying various city shapes, we generalise and propose a reduced form to estimate UHI intensities based only on the structure of urban sites, as well as their relative distances. We conclude that in addition to the size, the UHI intensity of a city is directly related to the density and an amplifying effect that urban sites have on each other. Our approach can serve as a UHI rule of thumb for the comparison of urban development scenarios. How UHI intensity responds to variations of urban structure is unclear. Here the authors proposed a reduced form approach that is able to estimate UHI intensities based only on the number and location of urban sites as well as their distance.
On the influence of density and morphology on the Urban Heat Island intensity
Yunfei Li,S. Schubert,J. Kropp,D. Rybski
Published 2020 in Nature Communications
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- Publication year
2020
- Venue
Nature Communications
- Publication date
2020-05-27
- Fields of study
Medicine, Engineering, Environmental Science
- Identifiers
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- Source metadata
Semantic Scholar, PubMed
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