Effects of the spatial configuration of trees on urban heat mitigation: A comparative study

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

	Effects of the spatial configuration of trees on urban heat mitigation: A comparative study
	Wang, Jia; Zhou, Weiqi; Cadenasso, Mary L.
刊名	REMOTE SENSING OF ENVIRONMENT
	2017-06-15
卷号	195 期号:0 页码:1-12
关键词	Urban Tree Canopy Spatial Configuration Urban Heat Mitigation Urban Ecology Baltimore Sacramento
英文摘要	Urban greenspace has significant cooling effects on urban heat. Recent studies investigating the effects of spatial configuration of greenspace show significant, but inconsistent results, including both positive and negative effects. To investigate the causes of this inconsistency, we compared Baltimore, MD and Sacramento, CA, USA, two cities with very different climatic conditions. We quantified and compared the relationships between the spatial configuration of trees and land surface temperature (LST) using different statistical approaches, and conducted the analyses using spatial units of different sizes, based on trees mapped from 1 m high resolution imagery. We found: (1) trees' cooling efficiency was higher in Baltimore than in hotter and drier Sacramento. Additionally, percent cover of trees was more important than their spatial configuration in predicting LST in Baltimore, but the opposite was found in Sacramento. (2) Spatial configuration of trees affects LST more in Sacramento than in Baltimore, and the effects of spatial configuration of trees on LST varied greatly in terms of magnitude, significance, and even direction, between the two cities. Notably, mean patch size had significantly positive effects on LST in Baltimore, but negative effects in Sacramento. In contrast, edge density had negative effects on LST in Baltimore, but positive effects in Sacramento. (3) Different statistical approaches resulted in dramatic changes in the relationships between CST and configuration metrics. Our results underscore the necessity of controlling the effects of percent cover of trees, when quantifying the effects of spatial configuration of trees on LST. (4) Spatial autocorrelation may influence relationships between landscape metrics and LST, particularly when the unit of analysis is relatively small. (5) The relationships between spatial configuration metrics and LST are stronger with an increase of the size of the analytical unit. This study can enhance our understanding of the effects of spatial configuration of greenspace on urban heat island (UHI). It also provides important insights to urban planners and natural resource managers on how to mitigate the impact of urbanization on UHI through urban design and vegetation management. (C) 2017 Elsevier Inc. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39006]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Wang, Jia,Zhou, Weiqi,Cadenasso, Mary L.. Effects of the spatial configuration of trees on urban heat mitigation: A comparative study[J]. REMOTE SENSING OF ENVIRONMENT,2017,195(0):1-12.
APA	Wang, Jia,Zhou, Weiqi,&Cadenasso, Mary L..(2017).Effects of the spatial configuration of trees on urban heat mitigation: A comparative study.REMOTE SENSING OF ENVIRONMENT,195(0),1-12.
MLA	Wang, Jia,et al."Effects of the spatial configuration of trees on urban heat mitigation: A comparative study".REMOTE SENSING OF ENVIRONMENT 195.0(2017):1-12.