To develop a standard method of partitioning evapotranspiration (ET) fluxes, researchers took two years of above and below canopy eddy covariance (EC) data from a mixed forest and partitioned it into separate evaporation and transpiration fluxes. Results of those separated fluxes were then compared with the ecosystem demographic model and plot-level sap flow measurements.
Results indicate that concurrent EC measurements taken from above and below the canopy are a potentially viable method for partitioning ET fluxes in a forest. EC data was obtained with the LI-7500 Open Path CO2/H2O Gas Analyzer and H2O fluxes were calculated every half hour using EddyPro Software. Read the full paper here.