A Universal T-s-VI Triangle Method for the Continuous Retrieval of Evaporative Fraction From MODIS Products

doi:10.1002/2017JD026964

	A Universal T-s-VI Triangle Method for the Continuous Retrieval of Evaporative Fraction From MODIS Products
	Zhu, Wenbin 1,2; Jia, Shaofeng 1,2; Lv, Aifeng 1,2
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
	2017-10-16
卷号	122 期号:19 页码:10406-10427
关键词	evaporative fraction triangle method Southern Great Plains land surface temperature vegetation index MODIS
ISSN号	2169-897X
DOI	10.1002/2017JD026964
通讯作者	Zhu, Wenbin(zhuwb@igsnrr.ac.cn)
英文摘要	The triangle method based on the spatial relationship between remotely sensed land surface temperature (T-s) and vegetation index (VI) has been widely used for the estimates of evaporative fraction (EF). In the present study, a universal triangle method was proposed by transforming the T-s-VI feature space from a regional scale to a pixel scale. The retrieval of EF is only related to the boundary conditions at pixel scale, regardless of the T-s-VI configuration over the spatial domain. The boundary conditions of each pixel are composed of the theoretical dry edge determined by the surface energy balance principle and the wet edge determined by the average air temperature of open water. The universal triangle method was validated using the EF observations collected by the Energy Balance Bowen Ratio systems in the Southern Great Plains of the United States of America (USA). Two parameterization schemes of EF were used to demonstrate their applicability with Terra Moderate Resolution Imaging Spectroradiometer (MODIS) products over the whole year 2004. The results of this study show that the accuracy produced by both of these two parameterization schemes is comparable to that produced by the traditional triangle method, although the universal triangle method seems specifically suited to the parameterization scheme proposed in our previous research. The independence of the universal triangle method from the T-s-VI feature space makes it possible to conduct a continuous monitoring of evapotranspiration and soil moisture. That is just the ability the traditional triangle method does not possess.
资助项目	National Natural Sciences Foundation of China[41701485]
WOS关键词	SOUTHERN GREAT-PLAINS ; SENSED SURFACE-TEMPERATURE ; REMOTE-SENSING DATA ; SOIL-WATER CONTENT ; MSG-SEVIRI DATA ; CLEAR-SKY DAYS ; VEGETATION INDEX ; ENERGY-BALANCE ; AIR-TEMPERATURE ; HEAT-FLUX
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000413675900017
资助机构	National Natural Sciences Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/61181]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhu, Wenbin
作者单位	1.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Wenbin,Jia, Shaofeng,Lv, Aifeng. A Universal T-s-VI Triangle Method for the Continuous Retrieval of Evaporative Fraction From MODIS Products[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(19):10406-10427.
APA	Zhu, Wenbin,Jia, Shaofeng,&Lv, Aifeng.(2017).A Universal T-s-VI Triangle Method for the Continuous Retrieval of Evaporative Fraction From MODIS Products.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(19),10406-10427.
MLA	Zhu, Wenbin,et al."A Universal T-s-VI Triangle Method for the Continuous Retrieval of Evaporative Fraction From MODIS Products".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.19(2017):10406-10427.