Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: August 3, 2009
Publication Date: November 1, 2009
Citation: Colaizzi, P.D., Kustas, W.P., Evett, S.R., Howell, T.A. 2009. A dual-temperature-difference approach to estimate daytime sensible and latent heat fluxes under advective conditions during BEAREX08 [abstract]. American Society of Agronomy, Crop Science Society of America, Soil Science Society of America 2009 Annual Meeting Abstracts, November 1-5, 2009, Pittsburgh, Pennsylvania. 2009 CDROM. Technical Abstract: The Dual-Temperature-Difference (DTD) approach uses continuous radiometric surface temperature measurements in a two-source (soil + vegetation) energy balance model to solve for the daytime evolution of the sensible and latent heat fluxes. By using the surface-air temperature difference at two times during the day, the errors associated with accurate absolute surface-air temperature differences when the two-source model is applied for a single time-of-day are reduced. The DTD approach is useful in areas with significant local variations in air temperatures such as in advective environments with irrigated and non-irrigated fields. The DTD approach is evaluated at several sites ranging from irrigated and dryland cotton crops to a grassland/rangeland site.