BBAuthors: Yang, X.; Advisor: -; Participants: Fan, J.; Jones, S.B. (2018)
Our objective was to evaluate soil gas efflux by applying both methods in three different soil textures (loam, silty loam, and silty clay loam) packed in laboratory soil columns. Water was incrementally applied to soil surfaces while volumetric soil water contents (VWC) and CO2 concentrations were continually monitored at target locations in parallel with surface chamber measurements. The Soil Air Phase Individual Resistances (SAPHIR) model was used to determine the relative gas diffusion coefficients (DP/D0). The gradient‐based CO2 effluxes were compared with estimates derived from the CO2–efflux chamber. Soil CO2 effluxes estimated using the gradient method approximated those using ... 
