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首页> 外文期刊>Remote Sensing of Environment: An Interdisciplinary Journal >Analysis of urban heat-island effect using ASTER and ETM+ Data: Separation of anthropogenic heat discharge and natural heat radiation from sensible heat flux
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Analysis of urban heat-island effect using ASTER and ETM+ Data: Separation of anthropogenic heat discharge and natural heat radiation from sensible heat flux

机译：使用ASTER和ETM +分析城市热岛效应数据：将人为排放和自然热与显热通量分开

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The urban heat-island effect occurs as a result of increased sensible heat flux from the land surface to the atmosphere near cities. Sensible heat flux consists of two components: exhausted anthropogenic heat, and heat radiation due to solar input. The latter may be enhanced by changes in the usage of artificial land surface. The authors have developed a new method to separate the anthropogenically discharged heat and natural heat radiation from the sensible heat flux, based on a heat-balance model using satellite remote sensing and ground meteorological data. This method was applied to ASTER and ETM+ data for the daytime during spring, summer and winter and for the nighttime during autumn in Nagoya, Japan. The increased sensible heat flux was approximately 100 W/m2 in the central part of the city during the summer. Sensible heat flux at night during autumn was approximately 0 W/m2, except in urban areas and over bodies of water, During the winter, anthropogenic heat accounted for almost all of the sensible heat flux in urban areas. The contribution of anthropogenic heat to sensible heat flux in spring was lower than the contributions in summer and winter. The anthropogenic heat flux was high in industrial areas throughout the year. These results are consistent with the fact that anthropogenic energy consumption is high in summer and winter and low in spring and autumn.
机译：城市热岛效应是由于从陆地表面到城市附近大气的显热通量增加而产生的。显热通量由两个部分组成：人为的废热和太阳输入引起的热辐射。可以通过改变人工土地表面的使用来增强后者。作者开发了一种新方法，可基于利用卫星遥感和地面气象数据的热平衡模型，将人为排放的热量和自然热量辐射与显热通量区分开。此方法已应用于日本名古屋的春季，夏季和冬季的白天和秋季的夜间的ASTER和ETM +数据。夏季，城市中部的显热通量增加了大约100 W / m2。除城市地区和水域以外，秋季夜间的感热通量约为0 W / m2。在冬季，人为热量几乎占市区的所有感热通量。春季人为热量对显热通量的贡献低于夏季和冬季。全年工业区的人为热通量很高。这些结果与人为能源消耗在夏季和冬季较高而在春季和秋季较低的事实是一致的。

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