Domain & resolution

First you should decide if your final(!) simulation (see "Cascading" below) should be on a regional or a global grid and at which resolution you want to run. For this it is important to know that:

Number of points


Resolution → timestep

Cascadeing

Radiation timestep

Period

Initial conditions

Driving data

Geophysical fields

Schemes

Surface scheme

Lake scheme

Urbain scheme (TEB)

P3

Bourgouin

Spectral nudging


Output fields

Output frequency

Output levels