Should I include tides if my parent model have them included?

[jordiiglesias]

Dear all,

I am setting up a real-case simulation, and my parent model for initial and
boundary conditions is MEDSEA. According to theyr description "The hydrodynamics are supplied by the Nucleous for European Modelling of the Ocean NEMO (v4.2) and include the representation of tides".

Do I need to explicitly include tides in my ROMS simulation, or would that
duplicate their effect since they are already present in the parent model?

Thank you very much for your help!

Best regards,
Jordi

[wilkin]

If the values you are taking from NEMO are, say, hourly resolution and show tidal variability, then if you use those as boundary conditions you not add tides.

However, if the NEMO outputs are averages over a day or more (so effectively "de-tided" by the time filter) then it makes sense to add harmonic tidal variability at your boundary.