Assessing the urban heat island variations and its influencing mechanism in metropolitan areas of Pearl River Delta, South China

doi:10.1016/j.pce.2020.102953

	Assessing the urban heat island variations and its influencing mechanism in metropolitan areas of Pearl River Delta, South China
	Hou, Haoran 3,4; Liu, Kai 4; Li, Xueke 1; Chen, Shaohui 4; Wang, Weimin 2; Rong, Kai 5
刊名	PHYSICS AND CHEMISTRY OF THE EARTH
	2020-12-01
卷号	120 页码:10
关键词	Urban heat island Pearl river delta Attribution analysis Sensible heat Latent heat
ISSN号	1474-7065
DOI	10.1016/j.pce.2020.102953
通讯作者	Liu, Kai(liukai_cas@yahoo.com)
英文摘要	Urban heat island (UHI) is human-induced temperature reflected on the earth's surface. Although spatiotemporal variations and driving factors of UHI have been explored extensively, the underlying mechanisms of UHI remain uncertain. Using multi-source datasets of air temperature (Ta) and surface heat flux variables, we quantify the dynamics of urban-rural Ta difference (Delta T) at monthly, seasonal and annual time scales for nine cities in Pearl River Delta (PRD) during 2000-2017. The impact of sensible heat flux and latent heat flux on UHI variations are further investigated from the perspective of the surface energy balance theory. Results demonstrate that all PRD cities have apparent UHI, as evidenced by maximum Delta T in summer and minimum Delta T in winter. A notably declining trend of Delta T is observed in Shenzhen and Guangzhou, which have the largest population and build-up areas, during 2000-2017. However, trends of Delta T are not statistically significant in other cities. Attribution analysis reveals that sensible heat and latent heat significantly affect the UHI at different stages of urbanization. For the nine cities in PRD, the primary factor responsible for heat convection is the varied urban compositions formed by different developing trajectories. Specifically, sensible heat flux contributes substantially to Delta T changes in Dongguan and Shenzhen, which experienced rapid urban expansion and with complex urban structures. By contrast, latent heat flux dominates the Delta T changes in Zhongshan and Huizhou where relatively simple urban structures are preserved. Our study highlights the importance of urban patterns, sensible heat, and latent heat to understand the UHI dynamics and variations in PRD, which provides guidance for developing appropriate mitigation strategies in city planning to alleviate UHI-related burdens.
资助项目	National Natural Science Foundation of China[41971315/41571356]
WOS关键词	MANN-KENDALL ; TEMPERATURE ; CLIMATE ; ATTRIBUTION ; EXPANSION ; PATTERNS ; IMPACTS ; SUMMER
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences ; Water Resources
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000600436800001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/137131]
专题	中国科学院地理科学与资源研究所
通讯作者	Liu, Kai
作者单位	1.Brown Univ, Inst Brown Environm & Soc, Providence, RI 02912 USA 2.Shenzhen Environm Monitoring Ctr, Shenzhen 518049, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 5.Shanghai Cagen Intelligent Technol Co Ltd, Shanghai 201100, Peoples R China
推荐引用方式 GB/T 7714	Hou, Haoran,Liu, Kai,Li, Xueke,et al. Assessing the urban heat island variations and its influencing mechanism in metropolitan areas of Pearl River Delta, South China[J]. PHYSICS AND CHEMISTRY OF THE EARTH,2020,120:10.
APA	Hou, Haoran,Liu, Kai,Li, Xueke,Chen, Shaohui,Wang, Weimin,&Rong, Kai.(2020).Assessing the urban heat island variations and its influencing mechanism in metropolitan areas of Pearl River Delta, South China.PHYSICS AND CHEMISTRY OF THE EARTH,120,10.
MLA	Hou, Haoran,et al."Assessing the urban heat island variations and its influencing mechanism in metropolitan areas of Pearl River Delta, South China".PHYSICS AND CHEMISTRY OF THE EARTH 120(2020):10.