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首页> 外文会议>Remote sensing technologies and applications in urban environments II >Spatio-Temporal Variability of Urban Heat Islands in Local Climate Zones of Delhi NCR
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Spatio-Temporal Variability of Urban Heat Islands in Local Climate Zones of Delhi NCR

机译：德里NCR局部气候区中城市热岛的时空变化

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Land use change is at the nexus of human territory expansion and urbanization. Human intrusion disturbs the natural heat energy balance of the area, although a new equilibrium of energy flux is attained but with greater diurnal range and adversely affecting the geo/physical variables. Modification in the trend of these variables causes a phenomenon known as Urban Heat Island (UHI) i.e. a dome of heat is formed around the city which has 7-10 ℃ high temperature than the nearby rural area at night. The study focuses on Surface UHI conventionally studied using thermal band of the remotely sensed satellite images. Land Surface Temperature (LST) is determined for the year 2015 using Landsat 8 for Delhi National Capital Region (NCR). This region was chosen because it is the biggest urban agglomeration in India, many satellite cities are coming in periphery and it has temperate climate. Quantification of UHI is predictably done using UHI intensity that is the difference between representative Urban and rural temperature. Recently the definition of urban and rural has been questioned because of various kinds of configurations of urban spaces across the globe. Delhi NCR urban configurations vary spatially- thus one UHI intensity does not give a deep understanding of the micro-climate. Advancement was made recently to standardize UHI intensity by dividing city into Local Climate Zones (LCZ), comes with 17 broad categories. LCZ map of Delhi NCR has been acquired from World Urban Database. The seasonality in LST across LCZ has been determined along with identifying warmest and coolest LCZ.
机译：土地利用变化是人类领土扩张和城市化的纽带。尽管获得了能量通量的新平衡，但人为入侵却扰乱了该地区的自然热能平衡，但其昼夜范围更大，并不利地影响了地球/物理变量。这些变量趋势的变化会导致一种被称为城市热岛（UHI）的现象，即在城市周围形成了一个热穹顶，其夜间温度比附近的农村地区高7-10℃。这项研究的重点是传统上使用遥感卫星图像的热带研究的表面超高热。使用德里国家首都辖区（NCR）的Landsat 8确定了2015年的地表温度（LST）。选择该区域是因为它是印度最大的城市群，许多卫星城市都在外围，气候温和。 UHI的定量可预测地使用UHI强度完成，UHI强度是代表城市和农村温度之间的差异。最近，由于全球范围内各种类型的城市空间配置，人们对城市和农村的定义提出了质疑。德里NCR城市配置在空间上有所不同-因此，一个UHI强度无法深入了解微气候。通过将城市划分为局部气候区（LCZ），最近在标准化UHI强度方面取得了进步，它包括17个大类。德里NCR的LCZ地图已从世界城市数据库中获取。确定了整个LCZ的LST的季节性，并确定了最温暖和最冷的LCZ。

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