Quantifying the Daytime and Night-Time Urban Heat Island in Birmingham, UK: A Comparison of Satellite Derived Land Surface Temperature and High Resolution Air Temperature Observations
Quantifying the Daytime and Night-Time Urban Heat Island in Birmingham, UK: A Comparison of Satellite Derived Land Surface Temperature and High Resolution Air Temperature Observations
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DOI：
10.3390/rs8020153
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发表时间：
2016-02-01
期刊：
影响因子：
5
通讯作者：
Muller, Catherine L.
中科院分区：
文献类型：
--
作者：
Azevedo, Juliana Antunes;Chapman, Lee;Muller, Catherine L.
城市热岛效应是城市气候学研究中最具代表性的现象之一。虽然一系列的测量和建模技术可以用来评估城市热岛，在城市地区的传统气象观测的缺乏一直是一个持续的限制研究。因此，遥感数据的可用性通过提供我们城市的高分辨率温度数据来帮助满足科学需求。然而，卫星安装的传感器测量地表温度（LST），而不是冠层空气温度，后者是城市热岛调查的关键参数。幸运的是，这样的数据越来越多地通过城市气象网络，现在提供了一个机会，量化和比较地表和冠层热岛在一个前所未有的规模。这项研究首次使用伯明翰城市气候实验室城市气象网络和MODIS LST的高分辨率气温数据来量化和识别英国伯明翰（一个人口约为100万的城市）白天和夜间城市热岛的空间格局。这种分析是在一系列的大气稳定度等级下进行的，并研究了城市地表和冠层热岛之间的关系。这项工作的一个重要发现是，它表明，使用观测，表面城市热岛的分布似乎是明确的土地利用，而冠层城市热岛，平流过程似乎发挥越来越重要的作用。强烈的关系，发现在白天和夜间的空气温度和LST在附近的规模，但即使使用更高分辨率的城市气象数据集，在城市规模的关系仍然有限。
The Urban Heat Island (UHI) is one of the most well documented phenomena in urban climatology. Although a range of measurements and modelling techniques can be used to assess the UHI, the paucity of traditional meteorological observations in urban areas has been an ongoing limitation for studies. The availability of remote sensing data has therefore helped fill a scientific need by providing high resolution temperature data of our cities. However, satellite-mounted sensors measure land surface temperatures (LST) and not canopy air temperatures with the latter being the key parameter in UHI investigations. Fortunately, such data is becoming increasingly available via urban meteorological networks, which now provide an opportunity to quantify and compare surface and canopy UHI on an unprecedented scale. For the first time, this study uses high resolution air temperature data from the Birmingham Urban Climate Laboratory urban meteorological network and MODIS LST to quantify and identify the spatial pattern of the daytime and night-time UHI in Birmingham, UK (a city with an approximate population of 1 million). This analysis is performed under a range of atmospheric stability classes and investigates the relationship between surface and canopy UHI in the city. A significant finding of this work is that it demonstrates, using observations, that the distribution of the surface UHI appears to be clearly linked to landuse, whereas for canopy UHI, advective processes appear to play an increasingly important role. Strong relationships were found between air temperatures and LST during both the day and night at a neighbourhood scale, but even with the use of higher resolution urban meteorological datasets, relationships at the city scale are still limited.