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DOI	10.1088/1748-9326/ab6ae2
	The influence of soil moisture and solar altitude on surface spectral albedo in arid area
	Yang J.; Li Z.; Zhai P.; Zhao Y.; Gao X.
发表日期	2020
ISSN	17489318
卷号	15 期号:3
英文摘要	Using data collected from a specially designed experiment at the Dunhuang Station (40 10′N, 94 31′E, 1150 m) from September 2017 to September 2018, we have characterized the influences of soil moisture and solar altitude on surface spectral albedo in an arid area. The specific settings of our experiment allowed us to minimize the influences of underlying surface, cloud cover, aerosol and weather conditions, and thus highlight the influence of soil moisture and solar altitude. During the timespan of the experiment, we observed the annual mean surface albedo of global radiation (GR), ultraviolet radiation (UV), visible radiation (VIS) and near-infrared radiation (NIR) to be 0.24, 0.11, 0.24 and 0.25. A significantly negative linear correlation between surface albedo and soil moisture was identified, with the correlation coefficients between GR, UV, VIS, NIR and soil moisture being -0.68, -0.75, -0.70 and -0.61. In addition, we identified an exponential relationship between surface albedo and solar altitude. The exponential regression coefficients are -0.21, -0.077, -0.53 and -0.21, respectively. From these analyses, we derived a new two-factor parametric formula for depicting the influence of soil moisture and solar altitude on surface spectral albedo. Using observation data, we demonstrate that the formula recapitulates the real-world relationship between soil moisture, solar altitude and surface spectral albedo with little deviation. These findings may help us gain a deeper understanding of improving land surface parameterizations and have potential implications for solar energy research and applications. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	soil moisture; solar altitude; surface spectral albedo
语种	英语
scopus关键词	Arid regions; Atmospheric radiation; Infrared devices; Infrared radiation; Soil surveys; Solar energy; Solar radiation; Correlation coefficient; Designed experiments; Exponential regression; Near-infrared radiations; solar altitude; Spectral albedos; Underlying surface; Visible radiations; Soil moisture; aerosol; albedo; altitude; arid region; land surface; regression analysis; soil moisture; solar radiation; solar system; ultraviolet radiation; China; Dunhuang; Gansu
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154178
作者单位	Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China; University of Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, China Meteorological Administration, Beijing, China
推荐引用方式 GB/T 7714	Yang J.,Li Z.,Zhai P.,et al. The influence of soil moisture and solar altitude on surface spectral albedo in arid area[J],2020,15(3).
APA	Yang J.,Li Z.,Zhai P.,Zhao Y.,&Gao X..(2020).The influence of soil moisture and solar altitude on surface spectral albedo in arid area.Environmental Research Letters,15(3).
MLA	Yang J.,et al."The influence of soil moisture and solar altitude on surface spectral albedo in arid area".Environmental Research Letters 15.3(2020).