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| Liebethal, C; Foken, T: On the Significance of the Webb Correction to Fluxes , Boundary-Layer Meteorology, 109, 99-106 (2003) | |
| Key words: CO2 flux, Eddy covariance, Latent heat flux, Webb correction |
Abstract:
For establishing correct mass or energy balances at the Earth's surface, detailed and correct
measurements of air constituent fluxes are needed. Flux measurements obtained from the eddy
covariance technique have to pass several corrections of different relevance in order to give correct flux
data. One of these corrections, the `Webb correction', is analysed herein from latent heat flux and CO2
flux data recorded during two field experiments. The significance of this correction for the latent heat flux
data varies with the air humidity and the Bowen ratio. The correction changes the latent heat flux values
only a little, but significantly (by 2 to 3%). For other air constituents (like CO2), the Webb correction is
much more important (20 to 30% of the flux). |
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