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首页> 外文期刊>Atmosphere >The Urban Heat Island Effect and the Role of Vegetation to Address the Negative Impacts of Local Climate Changes in a Small Brazilian City
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The Urban Heat Island Effect and the Role of Vegetation to Address the Negative Impacts of Local Climate Changes in a Small Brazilian City

机译：巴西一个小城市的城市热岛效应和植被在应对当地气候变化的负面影响中的作用

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This study analyzes the influence of urban-geographical variables on determining heat islands and proposes a model to estimate and spatialize the maximum intensity of urban heat islands (UHI). Simulations of the UHI based on the increase of normalized difference vegetation index (NDVI), using multiple linear regression, in Iporá (Brazil) are also presented. The results showed that the UHI intensity of this small city tended to be lower than that of bigger cities. Urban geometry and vegetation (UI and NDVI) were the variables that contributed the most to explain the variability of the maximum UHI intensity. It was observed that areas located in valleys had lower thermal values, suggesting a cool island effect. With the increase in NDVI in the central area of a maximum UHI, there was a significant decrease in its intensity and size (a 45% area reduction). It is noteworthy that it was possible to spatialize the UHI to the whole urban area by using multiple linear regression, providing an analysis of the urban set from urban-geographical variables and thus performing prognostic simulations that can be adapted to other small tropical cities.
机译：这项研究分析了城市地理变量对确定热岛的影响，并提出了一个模型来估算和空间化城市热岛的最大强度（UHI）。还介绍了在伊波拉（巴西）中使用归一化差异植被指数（NDVI）的增加，使用多元线性回归进行的UHI模拟。结果表明，这个小城市的UHI强度往往低于大城市。城市的几何形状和植被（UI和NDVI）是解释最大UHI强度变化的最大因素。观察到位于山谷中的区域具有较低的热值，表明存在冷岛效应。随着最大UHI中心区域NDVI的增加，强度和尺寸显着下降（面积减少45％）。值得注意的是，可以通过使用多元线性回归将UHI空间化到整个市区，从城市地理变量对市区进行分析，从而进行可以适应其他热带小城市的预后模拟。

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