✍ Scribed by Juan Pedro Montávez; Jesús Fidel González-Rouco; Francisco Valero
No coin nor oath required. For personal study only.
Several studies have tried to determine the empirical relationships between the maximum urban heat island (UHI) intensity and factors such as the city size taking the number of inhabitants as indicator, the geometry of the city (i.e. the H/W ratio), meteorological factors, etc. On the other hand, numerical models have also been formulated to understand the main factors contributing to the formation of UHI.
In this work, a set of empirical equations for determining the maximum of the UHI is presented. The equations have been fitted to the output results of a set of experiments performed by a canyon model (Montávez et al., 2000a), investigating the main factors contributing to the nocturnal UHI. The input parameters are the thermal inertia of rural and urban materials, the H/W ratio and the increase in long‐wave sky radiation due in part to pollution over cities. The results obtained are able to reproduce most of UHI intensity maxima around the world. Copyright © 2007 Royal Meteorological Society
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