The contribution of soil fluxes to the total canopy energy and carbon flux of maize

During the summer of 1999, the soil contribution to sensible, latent, and carbon flux was evaluated by placing an eddy covariance system 1 m above above the soil inside a maize canopy. Net radiation at this level was also determined to assess the available energy for partitioning into sensible and latent heat flux. Power and co-spectral analysis shows that a majority of the flux is contained in the frequency range from 0.01 to 0.1 (s -1) Results from conditional sampling methodologies will also be discussed.