气候变化领域集成服务门户(CCPortal): Surface anthropogenic heat islands in six megacities: An assessment based on a triple-source surface energy balance model

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DOI	10.1016/j.rse.2020.111751
	Surface anthropogenic heat islands in six megacities: An assessment based on a triple-source surface energy balance model
	Firozjaei M.K.; Weng Q.; Zhao C.; Kiavarz M.; Lu L.; Alavipanah S.K.
发表日期	2020
ISSN	00344257
卷号	242
英文摘要	Anthropogenic heat flux (AHF) is a main contributor to the formation of surface urban heat islands (SUHI). Megacities in particular are facing severe problems due to excessive population growth, urban area expansion, human activity, increased energy consumption, and increased anthropogenic heat. In this study, a physical modeling approach based on a triple-source surface energy balance (triple-SEB) model was developed to uncover the effect of AHF on land surface temperature (LST) and surface anthropogenic heat island (SAHI) intensity. For this purpose, satellite imagery along with climatic and meteorological data from 1985 to 2019 were studied for six selected megacities: Los Angeles, Atlanta, Athens, Istanbul, Tehran, and Beijing. First, LST and the fraction of different surface covers were calculated by using a single-channel algorithm and a normalized spectral mixture analysis model, respectively. In the second step, impervious surface cover (ISC) and the urban main boundary area (UMBA) of each city were extracted based on the biophysical composite index and city clustering algorithm, respectively. In the third step, anthropogenic LST (ALST) was modeled using a triple-SEB model. In the fourth step, the ALST and UMBA were used together to model SAHI intensity at different dates. Finally, the relationship between the estimated ALST and ISC, as well as between SAHI and ISC, was examined. Results show that the average value of estimated ALST for the megacities increased from 2.02, 0.55, 0.61, 0.64, 0.58, and 0.72 to 2.99, 1.73, 1.66, 1.19, 2.32, and 2.76 °C, respectively. The coefficient of determination between the mean value of ISC and the estimated ALST for all megacities yielded 0.8, which was higher than that between ISC and satellite-derived LST. Moreover, the SAHI intensity for these megacities was found to have increased to 0.73, 0.92, 0.95, 0.98, 0.95 and 1.32 °C, respectively, which can be predicted by ISC with a coefficient of determination of 0.78, 0.79, 0.79, 0.73, 0.71 and 0.52, respectively. This suggests that the triple-SEB model proposed by this study allowed for independent modeling of AHF's influence on SUHI and a better determination of the effect of ISC on LST and SUHI intensity. This approach facilitated comparative analysis of LST and SAHI for a city at different times as well as SAHIs in different cities with different geographic and climate settings. © 2020 Elsevier Inc.
英文关键词	Anthropogenic heat flux; Impervious surface coverage; Land surface temperature due to anthropogenic heat flux; Megacity; Surface anthropogenic heat island; Triple-source surface energy balance model
语种	英语
scopus关键词	Atmospheric temperature; Clustering algorithms; Energy balance; Energy utilization; Heat flux; Interfacial energy; Landforms; Meteorology; Population statistics; Sandwich structures; Satellite imagery; Surface measurement; Surface properties; Urban growth; Anthropogenic heat; Anthropogenic heat flux; Impervious surface; Megacities; Surface energy balance modeling; Land surface temperature; algorithm; cluster analysis; energy balance; heat island; megacity; satellite imagery; soil temperature; surface energy; urban area; Athens [Attica]; Atlanta; Attica; Beijing [China]; China; Georgia; Greece; Iran; Istanbul [Turkey]; Los Angeles [California]; Tehran [Iran]; Turkey; United States
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179355
作者单位	Department of Remote Sensing and GIS, Faculty of Geography, University of Tehran, Tehran, Iran; Center for Urban and Environmental Change, Department of Earth and Environmental Systems, Indiana State University, Terre Haute, IN 47809, United States; Land Change Science Research Unit, Swiss Federal Research Institute WSL, Birmensdorf, CH-8903, Switzerland; Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, 100094, China
推荐引用方式 GB/T 7714	Firozjaei M.K.,Weng Q.,Zhao C.,et al. Surface anthropogenic heat islands in six megacities: An assessment based on a triple-source surface energy balance model[J],2020,242.
APA	Firozjaei M.K.,Weng Q.,Zhao C.,Kiavarz M.,Lu L.,&Alavipanah S.K..(2020).Surface anthropogenic heat islands in six megacities: An assessment based on a triple-source surface energy balance model.Remote Sensing of Environment,242.
MLA	Firozjaei M.K.,et al."Surface anthropogenic heat islands in six megacities: An assessment based on a triple-source surface energy balance model".Remote Sensing of Environment 242(2020).