Urban heat island intensity in London: An investigation of the impact of physical characteristics on changes in outdoor air temperature during summer
Urban heat island intensity in London: An investigation of the impact of physical characteristics on changes in outdoor air temperature during summer
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DOI：
10.1016/j.solener.2008.05.004
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发表时间：
2008-01-01
期刊：
影响因子：
6.7
通讯作者：
Giridharan, Renganathan
中科院分区：
文献类型：
--
作者：
Kolokotroni, Maria;Giridharan, Renganathan
这项研究着眼于缓解城市热岛强度（UHI）在伦敦在夏季的物理特性的潜力。本研究使用六个现场变量，即纵横比，表面粗糙度，计划密度比，绿色密度比，织物密度比和热质量的调查在六个数据集。夏季的气候变化是通过将数据分为晴天、部分多云和多云时段来控制的。通过将数据分类为核心、城市和半城市地区来控制地理差异。当风速小于5 m/s时，半城市地区在部分多云时段白天最大热岛效应为8.9 ℃，而在城市地区在晴空时段夜间最大热岛效应为8.6 ℃。决定伦敦室外空气温度变化的最关键的气候和地理位置分别是部分多云时段和市区。在所研究的变量中，决定室外空气温度白天和夜间变化的最关键变量是地面温度。(C)2008爱思唯尔有限公司版权所有。
The study looks at the potential of physical characteristics in mitigating the urban heat island intensity (UHI) in London during summer. This research uses six on-site variables namely aspect ratio, surface albedo, plan density ratio, green density ratio, fabric density ratio and thermal mass for the investigation in six data sets. The climatic variations in summer are controlled by classifying the data into clear sky, partially cloudy and cloudy periods. Geographical variation is controlled by classifying the data into core, urban and semi urban areas. Maximum daytime UHI of 8.9 degrees C is found in semi-urban area during partially cloudy period while maximum nocturnal UHI of 8.6 degrees C is found in urban area during clear sky period when the wind velocity is below 5 m/s. The most critical climate and geographical location in determining the changes in outdoor air temperature in London are partially cloudy periods and urban areas respectively. Among the variables studied, most critical variable that determines the daytime and nocturnal changes in outdoor air temperature is surface albedo. (C) 2008 Elsevier Ltd. All rights reserved.