干旱区生态环境知识资源中心(Arid): Identifying and characterizing frequency and maximum durations of surface urban heat and cool island across global cities

Arid

DOI	10.1016/j.scitotenv.2022.160218
	Identifying and characterizing frequency and maximum durations of surface urban heat and cool island across global cities
	Li, Kangning; Chen, Yunhao
通讯作者	Chen, YH
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2023
卷号	859
英文摘要	Surface urban heat island (SUHI) has been widely reported from a local to global scale. However, variations and controls of temporal indicators for SUHI and SUCI (surface urban cool island) remain unclear. This paper firstly reconstructed the seamless daily LST (land surface temperature) based on ATC-SKT (annual temperature cycle-skin temperature) and comprehensively validated for SUHI applications across 1112 global cities. Based on the seamless daily LST, this paper further characterized the spatiotemporal variations of the frequency (SUHIF and SUCIF) and maximum duration (SUHID and SUCID) and investigated the impacts from related factors, inconsideration of the different characteristics of SUHI and SUCI. There are five major findings. (1) The seamless daily LST reconstructed based on ATC-SKT is validated through pixel-based temperature and city-based SUHII accuracy assessments. (2) The selection of the frequency threshold is based on robustness for LST accuracy, approximation to SUHII global average, and mitigation of frequency saturation. (3) The average daytime SUHIF is 214 days/year, with 44 % of cities exhibiting SUHI occurrences for almost every day in summer. The nighttime SUHIF is 175 days/year, with increasing latitudinal variations from equatorial to polar regions. The daytime SUCIF is 41 days/year, with the greatest average frequency of 172 days/year exhibited in arid regions. (4) The average SUHID is 147 days at daytime and 58 days at nighttime, with relatively opposite geographical distributions between day and night. (5) Greater vegetation difference at daytime and greater albedo difference at nighttime result in more occurrences and longer consecutive durations of SUHI, with opposite effects on the temporal indicators of SUCI. Furthermore, the improvements in daily SUHII and impacts from the maximum duration were discussed. This paper aims to identify and highlight the period with significant SUHI and SUCI effects across global cities for further mitigation.
英文关键词	Surface urban heat island Annual temperature cycle Frequency Maximum duration Spatial variations Factor analysis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001022276200001
WOS关键词	TEMPERATURE DATA ; ANNUAL DYNAMICS ; VALIDATION ; REFINEMENTS ; ALGORITHM ; PHENOLOGY ; FRAMEWORK ; CLIMATE ; DATASET ; HEALTH
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398488
推荐引用方式 GB/T 7714	Li, Kangning,Chen, Yunhao. Identifying and characterizing frequency and maximum durations of surface urban heat and cool island across global cities[J],2023,859.
APA	Li, Kangning,&Chen, Yunhao.(2023).Identifying and characterizing frequency and maximum durations of surface urban heat and cool island across global cities.SCIENCE OF THE TOTAL ENVIRONMENT,859.
MLA	Li, Kangning,et al."Identifying and characterizing frequency and maximum durations of surface urban heat and cool island across global cities".SCIENCE OF THE TOTAL ENVIRONMENT 859(2023).