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DOI	10.1016/j.scitotenv.2018.10.025
	Quantifying urban heat island intensity and its physical mechanism using WRF/UCM
	Li, Huidong; Zhou, Yuyu; Wang, Xun; Zhou, Xu; Zhang, Huiwen; Sodoudi, Sahar
通讯作者	Sodoudi, S (通讯作者)
发表日期	2019
ISSN	0048-9697
EISSN	1879-1026
起始页码	3110
结束页码	3119
卷号	650
英文摘要	Reliable quantification of urban heat island intensity (UHII) is crucial for the evaluation of extreme heat waves and the related heat stress. As a powerful approach for the study of urban climate, numericalmodels can simulate urban heat island (UHI) in both high spatial and temporal resolutions. However, accurate quantification of UHII using modelling grid data is still a challenge at present, due to the different criterions for the selection of urban/rural grids. This study simulates the high-resolution UHI in the city of Berlin using the Weather Research and Forecasting Model coupled with Urban Canopy Module. A new method to quantify UHII, which is based on the fitted linear functions of simulated 2-m air temperature (T-2m) using the impervious surface area inWRF grids (ISA(WRF)), was adopted and evaluated. The simulated T-2m matches the observations well, with a correlation coefficient of 0.95 (P < 0.01) and RMSE of 1.76 degrees C. The study area shows a strong UHI at nighttime. The simulated nighttime T-2m increases with the increase in the ISAWRF. The linear functions of simulated nighttime T-2m against ISAWRF are well fitted. The UHII is calculated as the products of the slopes of fitted functions and the largest ISAWRF. The derived UHII shows U-shaped diurnal variations, with high values at nighttime. The difference of simulated surface temperature and sensible heat flux between the impervious surface and the vegetation surface jointly determines the derived UHII. The large difference of surface temperature and the small difference of sensible heat flux between the impervious and the vegetation surface generate the high UHII at nighttime and vice versa during the daytime. The method of ISA(WRF)-based function of T-2m overcomes the problems of traditional methods in arbitrary selecting urban/rural grids. It can be used easily to quantify UHII and to do the comparison study of UHII between different cities. (c) 2018 Elsevier B.V. All rights reserved.
关键词	AIR-TEMPERATURE CANOPY MODEL WRF MODEL CLIMATE IMPACT MODIS SENSITIVITY SIMULATION CONVECTION INDICATORS
英文关键词	Urban heat island intensity; Impervious surface area; Urban parameters; WRF/UCM; Berlin
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000447871400139
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259487
推荐引用方式 GB/T 7714	Li, Huidong,Zhou, Yuyu,Wang, Xun,et al. Quantifying urban heat island intensity and its physical mechanism using WRF/UCM[J]. 中国科学院青藏高原研究所,2019,650.
APA	Li, Huidong,Zhou, Yuyu,Wang, Xun,Zhou, Xu,Zhang, Huiwen,&Sodoudi, Sahar.(2019).Quantifying urban heat island intensity and its physical mechanism using WRF/UCM.SCIENCE OF THE TOTAL ENVIRONMENT,650.
MLA	Li, Huidong,et al."Quantifying urban heat island intensity and its physical mechanism using WRF/UCM".SCIENCE OF THE TOTAL ENVIRONMENT 650(2019).