A comparison of new and existing equations for estimating sensible heat flux using surface renewal and similarity concepts
MetadataShow full item record
This paper describes two approaches for estimating sensible heat flux, using surface renewal and similarity concepts. One approach depends on a temperature structure function parameter and is valid in the inertial sublayer. The other approach depends on the temperature standard deviation and operates
when measurements are made above the canopy top, either in the roughness or inertial sublayer. The approaches were tested over grass, rangeland grass, wheat, grape vineyard, and nectarine and olive orchards. It is shown that the free convection limit expression for the standard deviation method holds for slightly unstable conditions. When surface homogeneity and fetch requirements are not fully met in the field, the results show that the equations based on surface renewal principles are more robust and accurate than equations exclusively based on similarity backgrounds. It is likely that the two methods are less sensitive to site‐specific adjustment of the similarity relationships unless the canopy is rather heterogeneous. Under unstable conditions, the free convection limit equation, which depends on the temperature standard deviation, can provide online sensible heat flux estimates using affordable battery‐powered data logger with temperature data as the only input. The approach performed well when measuring above the canopy in the roughness and inertial sublayers, thus suggesting that the method is useful for long‐term monitoring over growing vegetation.
Is part ofWater Resources Research, 2006, vol. 42, núm. 8, art. W08406
Showing items related by title, author, creator and subject.
Estimating sensible heat flux using surface renewal analysis and the flux variance method: A case study over olive trees at Sástago (NE of Spain) Castellví Sentís, Francesc; Martínez-Cob, Antonio (American Geophysical UnionWiley, 2005)The eddy covariance technique for measuring surface fluxes is often not affordable outside experimental research institutes. Therefore knowledge of the performance of alternative methods for determining surface fluxes is ...
An advanced method based on surface renewal theory to estimate the friction velocity and the surface heat flux [Research data] Castellví Sentís, Francesc (Universitat de Lleida, 2018)Mesures del camp de velocitat del vent (3 components), temperatura sònica i de l'aire a alta freqüència (8-10 Hz) separades per fitxers en base temporal cada 30 min.
An advanced method based on surface renewal theory to estimate the friction velocity and the surface heat flux Castellví Sentís, Francesc (American Geophysical Union, 2018)The earlier formulation based on surface renewal (SR) analysis for estimating the sensible (or buoyant) heat flux (H) of a surface without requiring calibration involved canopy parameters to simultaneously estimate H and ...