Analysis of urban heat-island effect using ASTER and ETM+ Data: Separation of anthropogenic heat discharge and natural heat radiation from sensible heat flux
Analysis of urban heat-island effect using ASTER and ETM+ Data: Separation of anthropogenic heat discharge and natural heat radiation from sensible heat flux
复制标题
DOI：
10.1016/j.rse.2005.04.026
复制
发表时间：
2005-11-15
影响因子：
13.5
通讯作者：
Yamaguchi, Y
中科院分区：
文献类型：
--
作者：
Kato, S;Yamaguchi, Y
城市热岛效应的产生是由于从地面到城市附近大气的显着节拍通量增加。感热通量由两部分组成：耗尽的人为热和太阳输入的热辐射。后者可以通过改变人造地面的使用来加强。根据利用卫星遥感和地面气象资料建立的热平衡模型，提出了一种将人类排放的热量和天然热辐射与感热通量分离的新方法。该方法被应用于日本名古屋春季、夏季和冬季的白天以及秋季的夜间的ASTER和ETM+数据。夏季，市中心的感热通量增加了约100W/m(2)。除市区和水体外，秋季夜间的感热通量约为0W/m(2)。在冬季，人为热量几乎占据了城市地区所有的感热通量。春季人为热量对感热通量的贡献小于夏季和冬季。工业区全年人为热通量较高。这些结果与人类活动能耗夏、冬高、春、秋低相吻合。(C)2005 Elsevier Inc.保留所有权利。
The urban heat-island effect occurs as a result of increased sensible beat 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/m(2) in the central part of the city during the summer. Sensible heat flux at night during autumn was approximately 0 W/m(2), 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. (C) 2005 Elsevier Inc. All rights reserved.