The pressure-averaging technique was explained in a previous section. Because it increases the timestep, it should always be enabled. The option to turn it off is provided only to permit comparisons with and without pressure-averaging or between POP and other codes that do not incorporate this technique.
The pressure gradient term includes a density factor which is assumed to be a constant reference density in Boussinesq models. The depth-dependent pressure effects on this density can be corrected for using simple depth-dependent factors.
|Averaging of horizontal pressure gradient|
|lpressure_avg||.true.||.true.||.true., .false.||use pressure averaging to increase time step|
|lbouss_correct||.true.||.false.||.true., .false.||applies depth-dependent factor to correct for assumed constant density|