[MITgcm-support] MITgcm-support Digest, Vol 170, Issue 3

[rahele shafiee]

Jody thank you for your help


On Friday, August 4, 2017, 8:30:41 PM GMT+4:30, <mitgcm-support-request at mitgcm.org> wrote:

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Today's Topics:

  1. Tidal data (rahele shafiee)
  2. Re: Tidal data (Jody Klymak)


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Message: 1
Date: Thu, 3 Aug 2017 17:50:53 +0000 (UTC)
From: rahele shafiee <rahele_shafiee at yahoo.com>
To: "mitgcm-support at mitgcm.org" <mitgcm-support at mitgcm.org>,
    "mitgcm-support-request at mitgcm.org"
    <mitgcm-support-request at mitgcm.org>
Subject: [MITgcm-support] Tidal data
Message-ID: <121255581.6696580.1501782653497 at mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"


Hello to everyone

I would like to give my model the tidal amplitude and phase inthe open boundaries. How do I introduce these numbers to my model?

Can I give surface elevation (ETA) tothe model instead of the amplitude and phase monthly?

Cheers Rahele
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Message: 2
Date: Thu, 03 Aug 2017 11:09:36 -0700
From: "Jody Klymak" <jklymak at uvic.ca>
To: "mitgcm-support at mitgcm.org" <mitgcm-support at mitgcm.org>
Subject: Re: [MITgcm-support] Tidal data
Message-ID: <500DF17A-8A00-41AA-91EB-D049A8F0E65B at uvic.ca>
Content-Type: text/plain; charset="utf-8"; Format="flowed"



On 3 Aug 2017, at 10:50, rahele shafiee wrote:

> Hello to everyone
>
> I would like to give my model the tidal amplitude and phase inthe open 
> boundaries. How do I introduce these numbers to my model?
>
> Can I give surface elevation (ETA) tothe model instead of the 
> amplitude and phase monthly?

Hi Rahele,

The way to add open boundary forcing in the MITgcm is with `pkg/obcs` or 
`pkg/rbcs` (maybe others?)

`pkg/obcs` has forcing of tidal velocities normal to the open boundary, 
implemnted in `pkg/obcs/obcs_add_tides.F`.  You can get this to work by 
specifying in `data.obcs` appropriate names for `OBNAmFile` and 
`OBNphFile`.  Look at `pkg/obcs/obcs_readparms.F` for all the possible 
parameters you can read into the `pkg/obcs`, and read the source code to 
`pkg/obcs/obcs_add_tides.F` to see how it works.

As implemented, `pkg/obcs/obcs_add_tides.F` doesn?t modify the sea 
surface height at the boundary.  However, `pkg/obcs` does allow 
seasurface height to be specified at the boundary (i.e. see 
`OBNetaFile`, etc). So it seems a somewhat trivial task to write 
`obcs_add_tideheights.F` and have new parameters `OBNamEtaFile` etc that 
control the sea-surface height if you prefer that to specifying via the 
`OBNetaFile`.

I think this is all possible w/ `pkg/obcs`, though I admit I?m not 
sure if `rbcs` can force the sea surface.  I think not, though I could 
be misremembering.

I hope that gets you started.

Cheers,  Jody



>
> Cheers Rahele
> _______________________________________________
> MITgcm-support mailing list
> MITgcm-support at mitgcm.org
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