DOI: 10.5194/hess-18-1165-2014
Scopus记录号: 2-s2.0-84897454577
论文题名: Intercomparison of four remote-sensing-based energy balance methods to retrieve surface evapotranspiration and water stress of irrigated fields in semi-arid climate
作者: Chirouze J ; , Boulet G ; , Jarlan L ; , Fieuzal R ; , Rodriguez J ; C ; , Ezzahar J ; , Er-Raki S ; , Bigeard G ; , Merlin O ; , Garatuza-Payan J ; , Watts C ; , Chehbouni G
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 3 起始页码: 1165
结束页码: 1188
语种: 英语
Scopus关键词: Atmospheric temperature
; Energy balance
; Evapotranspiration
; Interfacial energy
; Remote sensing
; Soil moisture
; Vegetation
; Energy balance method
; Homogeneous conditions
; Soil-vegetation-atmosphere transfer models
; Surface energy balance models
; Surface energy budget
; Surface evapotranspiration
; Surface temperatures
; Vegetation condition
; Pixels
; energy balance
; evapotranspiration
; irrigation system
; latent heat flux
; pixel
; remote sensing
; semiarid region
; surface energy
; surface temperature
; water stress
英文摘要: Instantaneous evapotranspiration rates and surface water stress levels can be deduced from remotely sensed surface temperature data through the surface energy budget. Two families of methods can be defined: the contextual methods, where stress levels are scaled on a given image between hot/dry and cool/wet pixels for a particular vegetation cover, and single-pixel methods, which evaluate latent heat as the residual of the surface energy balance for one pixel independently from the others. Four models, two contextual (S-SEBI and a modified triangle method, named VIT) and two single-pixel (TSEB, SEBS) are applied over one growing season (December-May) for a 4 km × 4 km irrigated agricultural area in the semi-arid northern Mexico. Their performance, both at local and spatial standpoints, are compared relatively to energy balance data acquired at seven locations within the area, as well as an uncalibrated soil-vegetation-atmosphere transfer (SVAT) model forced with local in situ data including observed irrigation and rainfall amounts. Stress levels are not always well retrieved by most models, but S-SEBI as well as TSEB, although slightly biased, show good performance. The drop in model performance is observed for all models when vegetation is senescent, mostly due to a poor partitioning both between turbulent fluxes and between the soil/plant components of the latent heat flux and the available energy. As expected, contextual methods perform well when contrasted soil moisture and vegetation conditions are encountered in the same image (therefore, especially in spring and early summer) while they tend to exaggerate the spread in water status in more homogeneous conditions (especially in winter). Surface energy balance models run with available remotely sensed products prove to be nearly as accurate as the uncalibrated SVAT model forced with in situ data. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78289
Appears in Collections: 气候变化事实与影响
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作者单位: Centre d'Etudes Spatiales de la Biosphère, UPS, IRD-UMR5126, Toulouse, France; Universidad de Sonora, Hermosillo, Sonora, Mexico; Centre National de l'Energie, Des Sciences et des Techniques Nucléaires, Kénitra, Morocco; Département de Physique, Faculté des Sciences et Techniques, Université Cadi Ayyad, Marrakech, Morocco; Instituto Tecnológico de Sonora, Ciudad Obregón, Sonora, Mexico
Recommended Citation:
Chirouze J,, Boulet G,, Jarlan L,et al. Intercomparison of four remote-sensing-based energy balance methods to retrieve surface evapotranspiration and water stress of irrigated fields in semi-arid climate[J]. Hydrology and Earth System Sciences,2014-01-01,18(3)