Assessment of canopy stomatal conductance models using flux measurements.

摘要: Abstract Stomatal conductance ( g ) is a key parameter in controlling energy and water exchanges between canopy the atmosphere. models proposed by Ball, Woodrow Berry (BWB) Leuning have been increasingly used land surface schemes. In recent study, new diagnostic index was developed Wang et al. to examine response of humidity were resolve problems identified BWB models. This approach theoretically sound, but relies on latent heat CO 2 fluxes environmental variables at leaf which are not available most eddy correlation (EC) observation sites. this we tested empirically correcting EC measurements canopy-level replacing their corresponding ambient air variables, re-examined stomatal BWB, Leuning, We found that impact above modifications evaluation –humidity relationships very small. study provides practical investigate using routine measurements.