干旱区生态环境知识资源中心(Arid): Influence of urban extent discrepancy on the estimation of surface urban heat island intensity: A global-scale assessment in 892 cities

Arid

DOI	10.1016/j.jclepro.2023.139032
	Influence of urban extent discrepancy on the estimation of surface urban heat island intensity: A global-scale assessment in 892 cities
	Yang, Qiquan; Xu, Yi; Tong, Xiaohua; Hu, Ting; Liu, Yue; Chakraborty, T. C.; Yao, Rui; Xiao, Changjiang; Chen, Shurui; Ma, Zonghan
通讯作者	Xu, Y
来源期刊	JOURNAL OF CLEANER PRODUCTION
ISSN	0959-6526
EISSN	1879-1786
出版年	2023
卷号	426
英文摘要	The estimation of surface urban heat island intensity (SUHII) is crucial for studying the urban thermal envi-ronment, which is influenced not only by the commonly known definition of rural reference but also by the delineation of urban extent. Existing studies relies on various urban extent products defined in different ways, and the influence of urban extent discrepancy (UED) on SUHII estimates still remains unclear. In this study, we collected five open-source global urban extent products (GUEPs) for the year 2015 and corresponding daily land surface temperature (LST) observations (MYD11A1). Based on these products, we quantified the UED-induced uncertainty in SUHII estimates by comparing absolute difference (ASUHIIAD) and relative difference (ASUHIIRD) in SUHII among GUEPs across 892 global cities. Besides, we introduced an ISF-constrained (ISF-C) method to reduce SUHII differences among GUEPs by constraining the impervious surface fraction (ISF) within urban and rural extents. The results show that urban extents delineated by different GUEPs are not consistent, leading to their difference in ISF as well as LST, which in turn causes uncertainties in the estimated SUHII. On average for global cities, the annual daytime and nighttime ASUHIIAD are 0.46 +/- 0.02 degrees C (mean +/- 95% confi-dence interval) and 0.24 +/- 0.01 degrees C, with corresponding ASUHIIRD of 42.0 +/- 2.7% and 35.2 +/- 2.3%, respec-tively. The UED-induced uncertainty in SUHII estimates varies among climate zones, and the annual daytime ASUHIIRD averaged for cities located in the arid zone reaches up to 60.8 +/- 6.6%, which is nearly twice as high as that in other climate zones. More importantly, both ASUHIIAD and ASUHIIRD show lower values when using the ISF-C method, implying the effectiveness of this method. This study highlights the non-negligible impact of UED on the estimation of SUHII, which requires more attention due to the inconsistency of urban extents among current products.
英文关键词	SUHI Urban definition Impervious surface Quantification Globe
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001087024200001
WOS关键词	TEMPERATURE PRODUCTS ; VALIDATION ; PATTERNS ; IMPACT ; ZONES
WOS类目	Green & Sustainable Science & Technology ; Engineering, Environmental ; Environmental Sciences
WOS研究方向	Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397233
推荐引用方式 GB/T 7714	Yang, Qiquan,Xu, Yi,Tong, Xiaohua,et al. Influence of urban extent discrepancy on the estimation of surface urban heat island intensity: A global-scale assessment in 892 cities[J],2023,426.
APA	Yang, Qiquan.,Xu, Yi.,Tong, Xiaohua.,Hu, Ting.,Liu, Yue.,...&Ma, Zonghan.(2023).Influence of urban extent discrepancy on the estimation of surface urban heat island intensity: A global-scale assessment in 892 cities.JOURNAL OF CLEANER PRODUCTION,426.
MLA	Yang, Qiquan,et al."Influence of urban extent discrepancy on the estimation of surface urban heat island intensity: A global-scale assessment in 892 cities".JOURNAL OF CLEANER PRODUCTION 426(2023).