Summary:

Reactive Transport Solution

This section describes the solution process for the equation governing reactive transport (Eq. 2.25.11). The key steps are:

1. Resolve competition for CH4 and O2 (Section 2.25.7.1)
2. Add the ebullition flux into the layer directly above the water table or into the atmosphere
3. Calculate the overall CH4 or O2 source term based on production, aerenchyma transport, ebullition, and oxidation
4. Establish boundary conditions, including surface conductance to account for snow, ponding, and turbulent conductances, and bottom flux condition (Section 2.25.7.2)
5. Calculate diffusivity (Section 2.25.7.3)
6. Solve the resulting mass balance using a tridiagonal solver (Section 2.25.7.5)

The article provides a detailed, step-by-step description of the reactive transport solution process, with references to specific sections for further information on each step.