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Fig. 4. Average suction profiles for wetter conditions (condition WT) and drier conditions (condition DR) (A1, B1) and the measured CO2 profiles used to determine the gas diffusion coefficents (A2, B2) and the obtained gas diffusion coefficients (A3, B3). The CO2 fluxes were calculated at each depth from the CO2 profile and the gas diffusion coefficient (A4, B4). The CO2 production rate in a certain layer is the difference between the flux of inflow and outflow (A5, B5). The CO2 profiles were measured at 0-, 10-, 20-, 30-, and 40-cm depths. The plotted values are the average values between these depths.
