[MITgcm-support] What way is better to add tide in MITgcm?

[Matthew Mazloff]

Hello

Its best to use both. However in a 30x30 domain the local tidal loading force (i.e. the forcing equivalent to an air pressure loading at the surface) likely won’t have much influence and you can probably get away with just prescribing them at the obcs. 

Regarding atmospheric state, I find ERA-5 to be a great product. But others have value too.

-Matt



> On Mar 3, 2020, at 8:54 AM, Leming Van <ifanliming at outlook.com> wrote:
> 
> Hi, everyone
> 
> I‘m running a regional model in MITgcm, as far as I know, there are two ways to add tidal forcing, (1)using "obcs_add_tides" inOBCS pkg, (2) using hourly air pressure in EXF pkg. So I have a question, which one is more  accurate to simulate tide in a regional model (about 30°*30°)? 
> 
> By the way, about the sea surface forcing data, NCEP and ECMWF, which dataset is used by ECCO?
> 
> Thanks in advance.
> 
> 
> Best,
> Leming
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