A suit of test cases was developed to validate Metphomod . This test suit listed in Table 2 covers all critical aspect of the model. A selection of the more complex test cases is presented in sections 3.1-3.4.
| context | test | objective | see section |
| transport of a species with constant concentration in an inhomogeneous wind field | test if mass consistency is fulfilled | (not presented) | |
| transport | transport of a species with constant concentration in a flow around a cube | test if mass consistency is fulfilled | (not presented) |
| Advection of a two dimensional, bell shaped humidity field in a circular wind field | test accuracy and monotonicity of advection algorithm | (not presented) | |
| calculate behavior of an air mass in a field with constant pressure gradient (without Coriolis force) | test proper relation between air pressure gradient, density, and wind acceleration | (not presented) | |
| calculate the behavior of an air mass in a pressure field with constant gradient, fully considering the Coriolis force and starting with an ageostrophic wind | test if the cyclic behavior of wind direction and speed is produced according to theory | (not presented) | |
| dynamics | flow around a cube | test if reasonable wind field patterns are produced. In neutral situations the flow should rather pass over the cube, in stably stratified situations it should flow around the cube. | (not presented) |
| calculate the flow over a bell-shaped hill | test if the coupling between transport and pressure algorithm is correct, and if hydrostatic and non-hydrostatic waves are properly produced | 3.1 | |
| dynamics turbulence soil module | calculate all meteorological parameters in one vertical column, with the ground module and turbulence enabled | test all energy fluxes and turbulence intensities. Compare with measurements. | 3.3 |
| calculate a sea-breeze system | test if buoyancy, pressure, transport, and solar radiation are properly coupled | 3.2 | |
| calculate chemical reactions in a single grid-cell (box-model), compare with results from reference runs | test the proper implementation and the accuracy of the chemical solver. Test if mass consistency is fulfilled. | 3.4 | |
| chemistry | calculate the chemistry in a single column, including the soil module and deposition | compare deposition rates and velocities with measurements | 3.3 |