87
5
Thermal Radiation
and Energy Closure
Assessment in
Evapotranspiration
Estimation for Remote
Sensing Validation
John H. Prueger, Joe Alfieri, William Kustas,
Lawrence Hipps, Christopher Neale,
Steven R. Evett, Jerry Hatfield,
Lynn G. McKee, and Jose L. Chavez
CONTENTS
5.1 Introduction .................................................................................................... 88
5.2 Surface Energy Balance ................................................................................. 89
5.2.1 Energy Balance Equation ................................................................... 89
5.2.2 Eddy Covariance ................................................................................90
5.3 Site Description and Instrumentation .............................................................92
5.4 Data Treatment ............................................................................................... 95
5.4.1 Spectral Analysis ................................................................................ 95
5.4.2 Ogive Plots ......................................................................................... 95
5.4.3 Energy Balance Closure .....................................................................96
5.5 Data Processing ..............................................................................................97
5.5.1 Calculation of Spectra ........................................................................97
5.5.2 Calculation of Turbulent Fluxes ......................................................... 98
5.6 Results ............................................................................................................99
5.7 Conclusions .................................................................................................. 106
References ............................................................................................................. 107
5
Thermal Radiation
and Energy Closure
Assessment in
Evapotranspiration
Estimation for Remote
Sensing Validation
John H. Prueger, Joe Alfieri, William Kustas,
Lawrence Hipps, Christopher Neale,
Steven R. Evett, Jerry Hatfield,
Lynn G. McKee, and Jose L. Chavez
CONTENTS
5.1 Introduction .................................................................................................... 88
5.2 Surface Energy Balance ................................................................................. 89
5.2.1 Energy Balance Equation ................................................................... 89
5.2.2 Eddy Covariance ................................................................................90
5.3 Site Description and Instrumentation .............................................................92
5.4 Data Treatment ............................................................................................... 95
5.4.1 Spectral Analysis ................................................................................ 95
5.4.2 Ogive Plots ......................................................................................... 95
5.4.3 Energy Balance Closure .....................................................................96
5.5 Data Processing ..............................................................................................97
5.5.1 Calculation of Spectra ........................................................................97
5.5.2 Calculation of Turbulent Fluxes ......................................................... 98
5.6 Results ............................................................................................................99
5.7 Conclusions .................................................................................................. 106
References ............................................................................................................. 107