Energy Balance Estimates of ET Energy Balance Estimates of ET ET is - PowerPoint PPT Presentation

Dec 07, 2023 •169 likes •361 views

Energy Balance Estimates of ET Energy Balance Estimates of ET ET is calculated as a component of the energy balance. ET is calculated as a component of the energy balance. ET H = R n - G G - - H = ET R n - : Net surface radiation flux

Energy Balance Estimates of ET Energy Balance Estimates of ET ET is calculated as a component of the energy balance. ET is calculated as a component of the energy balance. λ ET H = λ R n - G G - - H = ET R n - : Net surface radiation flux density (Wm - -2 2 ) R n ) R n : Net surface radiation flux density (Wm G : Ground heat flux density (Wm - -2 2 ) ) G : Ground heat flux density (Wm H : Sensible heat flux density (Wm - -2 2 ) ) H : Sensible heat flux density (Wm λ ET : Latent heat flux density (Wm λ -2 2 ) ET : Latent heat flux density (Wm - ) λ : Latent heat of vaporization of water (Jkg λ -1 1 ) : Latent heat of vaporization of water (Jkg - )
Land-Based ET Estimation: Flux Towers Salt Cedar Cottonwood Photos courtesy of James Cleverly, UNM
Photo courtesy of Zohrab Samani, NMSU
Photos courtesy of Zohrab Samani, NMSU
What Landsat Sees Visible Near Infrared Land Surface Wavelength in Microns 0 0.4 0.6 0.8 1.2 1.6 2.0 2.4 Band: 1 2 3 4 5 7 Various amounts of reflection Landsat Band 6 is the long-wave “thermal” band and is used for surface temperature (Slide by Richard Allen and colleagues)
Slide courtesy of Julie Coonrod, UNM
Slide courtesy of Jan Hendrickx, New Mexico Tech Satellite-Based ET Estimation SEBAL Algorithm
Remote-sensing based ET measurement Slide courtesy of Jan Hendrickx, New Mexico Tech

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