Spatial distribution and influencing factors on urban land surface temperature of twelve megacities in China from 2000 to 2017

China witnessed a rapid urbanization progress in the past 20 years. Urbanization can greatly influence urban environment, especially thermal environment. Causes for urban heat island (UHI) formation vary in different climatic regions. Understanding characteristics of spatial distribution of urban la...

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Autores principales:	Yanan Wang, Guihua Yi, Xiaobing Zhou, Tingbin Zhang, Xiaojuan Bie, Jingji Li, Bowen Ji
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Urbanization Urban land surface temperature (ULST) Landsat Spatial variation Influencing factors Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/9e2f7584a4b142e2adcaa1e1b9bea1a0
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spelling	oai:doaj.org-article:9e2f7584a4b142e2adcaa1e1b9bea1a02021-12-01T04:47:53ZSpatial distribution and influencing factors on urban land surface temperature of twelve megacities in China from 2000 to 20171470-160X10.1016/j.ecolind.2021.107533https://doaj.org/article/9e2f7584a4b142e2adcaa1e1b9bea1a02021-06-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21001989https://doaj.org/toc/1470-160XChina witnessed a rapid urbanization progress in the past 20 years. Urbanization can greatly influence urban environment, especially thermal environment. Causes for urban heat island (UHI) formation vary in different climatic regions. Understanding characteristics of spatial distribution of urban land surface temperature (ULST) and influencing factors of UHI formation is important for sustainable urban development. In this study, twelve megalopolises in China, each with a population over 5 million, were selected as research sites. Built-up areas and ULST of these megalopolises were extracted from remote sensing data of earth observation satellites of Landsat program for the three periods of 2000–2017. Spatial variation characteristics of ULST were analyzed. Influences of soil moisture, surface water availability, surface albedo, vegetation, energy consumption, gross domestic product, latitudes, precipitation, topography, and distance to the downtown on ULST were investigated through multivariate regression analysis. Results show that: all the cities expanded continuously from 2000 to 2017, but expansion rates varied significantly among the megalopolises. Urban expansion has significant effects on the spatial distribution of ULST. ULST changes more quickly when the expanded area and expansion rate are higher. Simultaneously, spatial distribution of ULST was found to relate to the shape of an urban boundary. Circularly expanding cities showed the most concentrated distribution of high-temperature regions. Correlation analysis revealed that surface water use, evapotranspiration, electric energy consumption, surface albedo, and vegetation activity were the primary influencing factors on ULST, while GDP, latitude, distance, and precipitation had no significant effects on ULST. Among the primary influencing factors, surface water was the main controlling factor on ULST in cities with more surface water distribution. Building area played a more important role in ULST in cities with less surface water distribution. In addition, vegetation area played a relatively more important role in ULST in semi-humid cities than humid cities.Yanan WangGuihua YiXiaobing ZhouTingbin ZhangXiaojuan BieJingji LiBowen JiElsevierarticleUrbanizationUrban land surface temperature (ULST)LandsatSpatial variationInfluencing factorsEcologyQH540-549.5ENEcological Indicators, Vol 125, Iss , Pp 107533- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Urbanization Urban land surface temperature (ULST) Landsat Spatial variation Influencing factors Ecology QH540-549.5
spellingShingle	Urbanization Urban land surface temperature (ULST) Landsat Spatial variation Influencing factors Ecology QH540-549.5 Yanan Wang Guihua Yi Xiaobing Zhou Tingbin Zhang Xiaojuan Bie Jingji Li Bowen Ji Spatial distribution and influencing factors on urban land surface temperature of twelve megacities in China from 2000 to 2017
description	China witnessed a rapid urbanization progress in the past 20 years. Urbanization can greatly influence urban environment, especially thermal environment. Causes for urban heat island (UHI) formation vary in different climatic regions. Understanding characteristics of spatial distribution of urban land surface temperature (ULST) and influencing factors of UHI formation is important for sustainable urban development. In this study, twelve megalopolises in China, each with a population over 5 million, were selected as research sites. Built-up areas and ULST of these megalopolises were extracted from remote sensing data of earth observation satellites of Landsat program for the three periods of 2000–2017. Spatial variation characteristics of ULST were analyzed. Influences of soil moisture, surface water availability, surface albedo, vegetation, energy consumption, gross domestic product, latitudes, precipitation, topography, and distance to the downtown on ULST were investigated through multivariate regression analysis. Results show that: all the cities expanded continuously from 2000 to 2017, but expansion rates varied significantly among the megalopolises. Urban expansion has significant effects on the spatial distribution of ULST. ULST changes more quickly when the expanded area and expansion rate are higher. Simultaneously, spatial distribution of ULST was found to relate to the shape of an urban boundary. Circularly expanding cities showed the most concentrated distribution of high-temperature regions. Correlation analysis revealed that surface water use, evapotranspiration, electric energy consumption, surface albedo, and vegetation activity were the primary influencing factors on ULST, while GDP, latitude, distance, and precipitation had no significant effects on ULST. Among the primary influencing factors, surface water was the main controlling factor on ULST in cities with more surface water distribution. Building area played a more important role in ULST in cities with less surface water distribution. In addition, vegetation area played a relatively more important role in ULST in semi-humid cities than humid cities.
format	article
author	Yanan Wang Guihua Yi Xiaobing Zhou Tingbin Zhang Xiaojuan Bie Jingji Li Bowen Ji
author_facet	Yanan Wang Guihua Yi Xiaobing Zhou Tingbin Zhang Xiaojuan Bie Jingji Li Bowen Ji
author_sort	Yanan Wang
title	Spatial distribution and influencing factors on urban land surface temperature of twelve megacities in China from 2000 to 2017
title_short	Spatial distribution and influencing factors on urban land surface temperature of twelve megacities in China from 2000 to 2017
title_full	Spatial distribution and influencing factors on urban land surface temperature of twelve megacities in China from 2000 to 2017
title_fullStr	Spatial distribution and influencing factors on urban land surface temperature of twelve megacities in China from 2000 to 2017
title_full_unstemmed	Spatial distribution and influencing factors on urban land surface temperature of twelve megacities in China from 2000 to 2017
title_sort	spatial distribution and influencing factors on urban land surface temperature of twelve megacities in china from 2000 to 2017
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/9e2f7584a4b142e2adcaa1e1b9bea1a0
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_version_	1718405739587829760

Spatial distribution and influencing factors on urban land surface temperature of twelve megacities in China from 2000 to 2017

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