Time-Series Analysis Reveals Intensified Urban Heat Island Effects but without Significant Urban Warming

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Time-Series Analysis Reveals Intensified Urban Heat Island Effects but without Significant Urban Warming
	Wang, Jia 2; Zhou, Weiqi 1,2; Wang, Jing 1,2
刊名	REMOTE SENSING
	2019-10-01
卷号	11 期号:19 页码:-
关键词	urban heat island land surface temperature trend analysis urban warming urban ecology Beijing
英文摘要	Numerous studies have shown an increased surface urban heat island intensity (SUHII) in many cities with urban expansion. Few studies, however, have investigated whether such intensification is mainly caused by urban warming, the cooling of surrounding nonurban regions, or the different rates of warming/cooling between urban and nonurban areas. This study aims to fill that gap using Beijing, China, as a case study. We first examined the temporal trends of SUHII in Beijing and then compared the magnitude of the land surface temperature (LST) trend in urban and nonurban areas. We further detected the temporal trend of LST (Trend(LST)) at the pixel level and explored its linkage to the temporal trends of EVI (Trend(EVI)) and NDBI (Trend(NDBI)). We used MODIS data from 2000 to 2015. We found that (1) SUHII significantly increased from 4.35 degrees C to 6.02 degrees C, showing an intensified surface urban heat island (SUHI) effect, with an annual increase rate of 0.13 degrees C in summer during the daytime and 0.04 degrees C in summer at night. In addition, the intensification of SUHII was more prominent in new urban areas (NUA). (2) The intensified SUHII, however, was largely caused by substantial cooling effects in nonurban areas (NoUA), not substantial warming in urban areas. (3) Spatially, there were large spatial variations in significant warming and cooling spots over the entire study area, which were related to Trend(NDBI) and Trend(EVI). Trend(NDBI) significantly affected Trend(LST) in a positive way, while the Trend(EVI) had a significant positive effect (p = 0.023) on Trend(LST) only when EVI had an increasing trend. Our study underscores the importance of quantifying and comparing the changes in LST in both urban and nonurban areas when investigating changes in SUHII using time-series trend analysis. Such analysis can provide insights into promoting city-based urban heat mitigation strategies which focused on both urban and nonurban areas.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42476]
专题	生态环境研究中心_城市与区域生态国家重点实验室
作者单位	1.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, 18 Shuangqing Rd, Beijing 100085, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing Urban Ecosyst Res Stn, 18 Shuangqing Rd, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jia,Zhou, Weiqi,Wang, Jing. Time-Series Analysis Reveals Intensified Urban Heat Island Effects but without Significant Urban Warming[J]. REMOTE SENSING,2019,11(19):-.
APA	Wang, Jia,Zhou, Weiqi,&Wang, Jing.(2019).Time-Series Analysis Reveals Intensified Urban Heat Island Effects but without Significant Urban Warming.REMOTE SENSING,11(19),-.
MLA	Wang, Jia,et al."Time-Series Analysis Reveals Intensified Urban Heat Island Effects but without Significant Urban Warming".REMOTE SENSING 11.19(2019):-.