Effects of green space dynamics on urban heat islands: Mitigation and diversification

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 green space dynamics on urban heat islands: Mitigation and diversification
	Sun, Ranhao; Chen, Liding
刊名	ECOSYSTEM SERVICES
	2017-02-01
卷号	23 期号:0 页码:38-46
关键词	Land Surface Temperature Temperature Mitigation Landscape Pattern Landscape Design Urbanization
英文摘要	Understanding how green spaces affect urban temperature is crucial for assessing thermal benefits of landscape planning. This study investigated green space dynamics and land surface temperature (LST) in the Beijing metropolis. Landscape types were classified from QuickBird (2002) and IKONOS (2012) images and LST values were extracted from Landsat TM images. Five landscape types were obtained in this region including impervious land (IL), forest land (FL), grass land (GL), water body (WB), and bare land (BL). Green expansion indicated landscape change from IL and BL to FL and GL. Green loss indicated landscape change from FL and GL to IL. Green exchange indicated landscape change between FL and GL. Results show that (1) the area of green space dynamics accounted for 38.24% of the total research area, including green space losses (108.86 km(2)), expansion (92.49 km(2)), and exchange (53.83 km(2)). (2) LST change was not significant in the unchanged (0-0.19 degrees C) and exchanged green space (in the range of-0.02-0.25 degrees C). However, there were minor decreases of LST in areas of green expansion (in the range of-1.11 degrees C to-0.67 degrees C) and major increases in LST in the areas of green losses (1.64-2.21 degrees C). The results indicated that the number of green spaces is not the only criteria that should be assessed for temperature mitigation. Ecosystem services of temperature mitigation are not equal between the loss and expansion of green spaces even within same area. Greater focus on protecting natural forests in cities might provide greater benefits for climate mitigation.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/38998]
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	Sun, Ranhao,Chen, Liding. Effects of green space dynamics on urban heat islands: Mitigation and diversification[J]. ECOSYSTEM SERVICES,2017,23(0):38-46.
APA	Sun, Ranhao,&Chen, Liding.(2017).Effects of green space dynamics on urban heat islands: Mitigation and diversification.ECOSYSTEM SERVICES,23(0),38-46.
MLA	Sun, Ranhao,et al."Effects of green space dynamics on urban heat islands: Mitigation and diversification".ECOSYSTEM SERVICES 23.0(2017):38-46.