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首页> 外文期刊>Advances in Remote Sensing >Assessment of Urban Heat Island Using Remotely Sensed Imagery over Greater Cairo, Egypt
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Assessment of Urban Heat Island Using Remotely Sensed Imagery over Greater Cairo, Egypt

机译：在埃及大开罗的远程感知图像评估城市热岛的评估

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The Urban Heat Island (UHI) results in significant and sometimes dramatic increases in air temperature differences between the urban environment and its surrounding areas. The heat island structure may extend from the ground to the top of roofs and canopy levels above ground. The Urban Heat Island effect is a leading factor in a long list of human health problems which are expected to increase with the rapid growth of urban populations and projected future climate change. Urban heat island studies can be conducted through either direct measurements of air temperature using automobile transects and weather station networks or through measuring surface temperature using airborne or satellite remote sensing. In this study, UHI was investigated over the Greater Cairo during both summer and winter seasons over two different dates. Landsat 7 ETM+ data were used and the mono-window algorithm was applied in the study. Results emphasis that both types of heat islands exist in the study area i.e. the surface and the atmospheric heat islands. Temperature differences ranged between 0.5°C to 3.5°C and these are much related to the existing land use/covers. It could be concluded that expansion of urban areas in Greater Cairo has led to increased thermal radiation of land surface on the highly populated areas.
机译：城市热岛（UHI）导致城市环境与周边地区的空气温差差异显着，有时显着增加。热岛结构可以从地面延伸到地面上方的屋顶顶部。城市热岛效应是人类健康问题长期列表的主要因素，这些问题预计会随着城市人口的快速增长和预计未来的气候变化而增加。城市热岛研究可以通过使用汽车横梁和气象站网络或通过使用空气或卫星遥感测量表面温度来进行空气温度的直接测量。在这项研究中，在两个不同的日期，夏季和冬季在大开罗的uhi被调查过。使用Landsat 7 ETM +数据，并在研究中应用单窗算法。结果强调研究区域中的两种热岛都存在于表面和大气热岛。温度差距在0.5°C至3.5°C之间，而且与现有的土地使用/封面有关。可以得出结论，大开罗的城市地区扩张导致了在高人口稠密地区的地表的热辐射。

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