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L’îlot de chaleur urbain et le changement climatique : application à l’agglomération rennaise

机译:城市热岛与气候变化:在雷恩城市化中的应用

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摘要

Urban development, characterized by the presence of buildings and impervious surfaces, modify the local climate and in particular, enhance the urban heat island (UHI). This phenomenon raises temperatures in cities at night, which could cause discomfort and over-mortality during heat waves. In the context of climate change and important population dynamics, this thesis is carried out in the Rennes Metropolitan area (in Brittany). Firstly, this thesis focuses on the spatial analysis of UHI variability according to land use and urban forms. To observe UHI in the Rennes Metropolitan area, a network of multiple measurement types were implemented at various scale. 1) a network of 22 permanents weather stations located in urban/rural sites; 2) a network of 20 temperature sensors placed in intra-urban area; and 3) a network of temperature measurements in two neighborhoods of Rennes and a small town, Vezin-le-Coquet. Secondly, spatial models of UHI were designed in this thesis at both the urban agglomeration and intra-urban scale. This multi-scale approach produced UHI map for these nesting-scales. Thirdly, this thesis determined the temporal variability of UHI by looking at the interaction between weather types and UHI. This analysis produced a statistical model of daily UHI magnitude according to meteorological observations. This model combined with data from downscaled climate change scenarios provided future projections of UHI. Lastly, this study deals with tools for town planning to prevent intensive UHI. UHI maps and downscaled climate change scenarios defined the risk assessment in the Rennes Metropolitan area
机译:以建筑物和不透水表面的存在为特征的城市发展改变了当地的气候,特别是增强了城市热岛(UHI)。这种现象会在夜间升高城市的温度,这可能在热浪中引起不适和过度死亡。在气候变化和重要人口动态的背景下,本论文在雷恩都会区(布列塔尼)进行。首先,本文着重于根据土地利用和城市形态对UHI变异性进行空间分析。为了在雷恩都会区观察UHI,在各种规模上实施了多种测量类型的网络。 1)由22个位于城市/农村站点的永久性气象站组成的网络; 2)在市区内放置20个温度传感器网络; 3)在雷恩两个街区和一个小镇Vezin-le-Coquet的温度测量网络。其次,本文在城市群和城市内部尺度上设计了UHI的空间模型。这种多尺度方法为这些嵌套尺度生成了UHI地图。第三,通过考察天气类型与UHI之间的相互作用,确定了UHI的时空变异性。根据气象观测,该分析产生了每日UHI大小的统计模型。该模型与缩小规模的气候变化情景中的数据相结合,提供了UHI的未来预测。最后,本研究涉及城镇规划工具,以防止密集的UHI。 UHI地图和按比例缩小的气候变化情景定义了雷恩都会区的风险评估

著录项

  • 作者

    Foissard Xavier;

  • 作者单位
  • 年度 2015
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  • 原文格式 PDF
  • 正文语种 fr
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