Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/3/2008
Publication Date: 10/5/2008
Citation: Akasheh, O., Gowda, P., Scanlon, B.R., Howell, T.A., French, A.N. 2008. Comparison of estimated surface energy fluxes using METRIC and two-source algorithms for Advective Conditions [abstract]. 2008 Joint Meeting of American Society of Agronomy, Soil Science Society of America, and Crop Science Society of America, October 5-9, 2008, Houston, Texas. Paper No. 535-2. 2008 CDROM.
Technical Abstract: Surface energy fluxes have long been recognized as playing an important role in determining exchanges of energy and mass between the hydrosphere, atmosphere, and biosphere. In this study, we applied the METRIC (Mapping ET at high Resolutions with Internal Calibration) algorithm to derive daily surface energy fluxes from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data for the highly advective Texas High Plains. Two ASTER images, acquired during the Bushland Evapotranspiration and Remote Sensing Experiment – 2007 were used for this purpose. Performance of the METRIC was evaluated by comparing estimated surface temperature, net radiation, soil heat flux, and daily ET with measured data on four large lysimeters in Bushland, Texas [35 deg 11 min N, 102 deg 06 min W; 1,170 m elevation MSL] managed by the USDA-ARS-Conservation and Production Research Laboratory at Bushland, Texas. Results indicate that the METRIC is suitable for predicting surface energy fluxes over the Texas High Plains. More evaluation is planned for different agroclimatological conditions in the region during the proposed BEAREX08.