气候变化领域集成服务门户(CCPortal): Influence of cloud cover on the relationship between the sky view factor and nocturnal urban heat islands

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DOI	10.3354/cr01584
	Influence of cloud cover on the relationship between the sky view factor and nocturnal urban heat islands
	Zhang G.; Zhang G.; Zhou C.; Zhu S.
发表日期	2019
ISSN	0936-577X
起始页码	127
结束页码	137
卷号	79 期号:2
英文摘要	Cloud amounts, their spatial distribution, and the sky view factor (SVF) all have effects on the nocturnal upwelling longwave radiation and result in different degrees of urban− rural radiation cooling, which are widely investigated in studies of the urban heat island phenomenon. Currently, most research studies discuss the influence of synoptic conditions and urban geometric morphology on urban heat islands. Here we attempted to determine the influence of cloud cover on the relationship between the SVF and nocturnal urban heat islands by calculating the SVF considering the cloud amount and its distribution. The Adelaide central urban area of South Australia was selected as the study area, and we used urban 3-dimensional building data with a spatial resolution of 1 m and field measurement meteorological data, as well as ceilometer-observed cloud data. We sequentially analyzed the influence of cloud amount on the instantaneous nocturnal urban heat island intensity (UHII), SVF, and SVF–UHII relationship. The SVF–UHII feature space was then constructed to explain the nocturnal urban heat island. The results reveal that there are high negative correlations between the total cloud amount and UHII, while the correlations change with site location. The cloud amount has an effect on the defined SVF. SVFs at all sites gradually increase with the cloud amount, and the SVF differences between various sites decrease with increasing cloud amount. The SVF–UHII feature space can be preliminarily used to explain and simulate the UHII at some sites under different cloud cover conditions, and the mean relative error of the simulated UHII for the example data was 20%. © Inter-Research 2019
英文关键词	Cloud cover; Feature space; Sky view factor; Urban heat island
语种	英语
scopus关键词	clear sky; cloud cover; factor analysis; longwave radiation; spatial distribution; synoptic meteorology; urban climate; Adelaide; Australia; South Australia
来源期刊	Climate Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146916
作者单位	School of Geography Science, Nanjing, 210044, China; School of Remote Sensing and Geomatics Engineering, Nanjing University of Information Science and Technology, Nanjing, 210044, China; National Meteorological Center, China Meteorological Administration, Beijing, 100081, China
推荐引用方式 GB/T 7714	Zhang G.,Zhang G.,Zhou C.,et al. Influence of cloud cover on the relationship between the sky view factor and nocturnal urban heat islands[J],2019,79(2).
APA	Zhang G.,Zhang G.,Zhou C.,&Zhu S..(2019).Influence of cloud cover on the relationship between the sky view factor and nocturnal urban heat islands.Climate Research,79(2).
MLA	Zhang G.,et al."Influence of cloud cover on the relationship between the sky view factor and nocturnal urban heat islands".Climate Research 79.2(2019).