Figure 8.

Model simulations showing that the effects of eCA on surface boundary-layer HCO₃⁻ and H⁺ concentrations are small. A, If CO₂ leaks from the cell, eCA can convert this leaked CO₂ to HCO₃⁻, but the surface HCO₃⁻ concentration increases by less than 1 μm. B, eCA has only a minor effect on the H⁺ concentration during CO₂ uptake. Both panels show results from simulations with T. weissflogii, since the effects of eCA, although still small, are more significant for this species.