Closure of Surface Energy Balance for Agricultural Fields Determined From Eddy Covariance Measurements.

The lack of energy balance closure is a major concern in many eddy covariance research studies.  This can be attributed to various factors such canopy heat storage, which is usually neglected in calculating the surface energy balance.  In this study, we are presenting data collected from eddy covariance and energy balance measurements made from several agricultural fields in the Texas high Plains as part of the Texas Alliance for water Conservation Demonstration Project. For these fields, we observed daytime energy balance closure ranging from 60-90% without considering the canopy heat storage. In 2010, we made eddy covariance and energy balance measurements from a subsurface drip irrigated cotton field in the Texas High Plains. Results will be presented on surface energy balance closure with and without considering the canopy heat storage and other factors.