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A New Contextual Parameterization of Evaporative Fraction to Reduce the Reliance of the T-s - VI Triangle Method on the Dry Edge
Zhu, Wenbin; Lv, Aifeng; Jia, Shaofeng; Yan, Jiabao
2017
Source PublicationREMOTE SENSING
ISSN2072-4292
Volume9Issue:1Pages:25
Corresponding AuthorJia, Shaofeng(jiasf@igsnrr.ac.cn)
AbstractIn this study, a new parameterization scheme of evaporative fraction (EF) was developed from the contextual information of remotely sensed radiative surface temperature (T-s) and vegetation index (VI). In the traditional T-s VI triangle methods, the Priestley-Taylor parameter circle divide of each pixel was interpolated for each VI interval; in our proposed new parameterization scheme (NPS), it was performed for each isopiestic line of soil surface moisture. Specifically, circle divide of mixed pixels was determined as the weighted-average value of bare soil circle divide and full-cover vegetation circle divide. The maximum T-s of bare soil (T-smax) is the sole parameter needed as the constraint of the dry edge. This has not only bypassed the task involved in the determination of the maximum T-s of fully vegetated surface (T-cmax), but also made it possible to reduce the reliance of the T-s - VI triangle methods on the determination of the dry edge. Ground-based measuremen T-s taken during 21 days in 2004 were used to validate the EF retrievals. Results show that the accuracy achieved by the NPS is comparable to that achieved by the traditional T-s - VI triangle methods. Therefore, the simplicity of the proposed new parameterization scheme does not compromise its accuracy in monitoring EF.
Keywordevaporative fraction T-s - VI triangle method TVX method MODIS
DOI10.3390/rs9010026
WOS KeywordSOUTHERN GREAT-PLAINS ; SENSED SURFACE-TEMPERATURE ; GREEN VEGETATION FRACTION ; REMOTE-SENSING DATA ; SOIL-WATER CONTENT ; AIR-TEMPERATURE ; ENERGY FLUXES ; HEAT-FLUX ; EVAPOTRANSPIRATION ESTIMATION ; SATELLITE IMAGERY
Indexed BySCI
Language英语
Funding ProjectNational Natural Sciences Foundation of China[90302009] ; Ministry of Water Resources of China
Funding OrganizationNational Natural Sciences Foundation of China ; Ministry of Water Resources of China
WOS Research AreaRemote Sensing
WOS SubjectRemote Sensing
WOS IDWOS:000395492600026
PublisherMDPI AG
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/64818
Collection中国科学院地理科学与资源研究所
Corresponding AuthorJia, Shaofeng
AffiliationChinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Zhu, Wenbin,Lv, Aifeng,Jia, Shaofeng,et al. A New Contextual Parameterization of Evaporative Fraction to Reduce the Reliance of the T-s - VI Triangle Method on the Dry Edge[J]. REMOTE SENSING,2017,9(1):25.
APA Zhu, Wenbin,Lv, Aifeng,Jia, Shaofeng,&Yan, Jiabao.(2017).A New Contextual Parameterization of Evaporative Fraction to Reduce the Reliance of the T-s - VI Triangle Method on the Dry Edge.REMOTE SENSING,9(1),25.
MLA Zhu, Wenbin,et al."A New Contextual Parameterization of Evaporative Fraction to Reduce the Reliance of the T-s - VI Triangle Method on the Dry Edge".REMOTE SENSING 9.1(2017):25.
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