[MITgcm-support] [EXTERNAL] How to start from given initial conditions without restarting the simulation

[Shevchenko, Igor]

Hi Jody,

Thank you for your suggestion.
Do you mean that setting up baseTime into, say 15, will make all necessary interpolations of the atmospheric forcing and open boundary conditions to match this particular moment in time?

Best regards,
Igor

________________________________________
From: MITgcm-support <mitgcm-support-bounces at mitgcm.org> on behalf of Jody Klymak <jklymak at uvic.ca>
Sent: 02 April 2020 20:39
To: mitgcm-support at mitgcm.org
Subject: Re: [MITgcm-support] [EXTERNAL] How to start from given initial conditions without restarting the simulation

Hi Igor,

Not 100% sure, but I *think* you can set baseTime to be 0, 5, 10, 15 in each of your new simulations, and then you can use the same forcing files for each of your runs?

Cheers,   Jody

On Apr 2, 2020, at  11:15 AM, Shevchenko, Igor <i.shevchenko at imperial.ac.uk<mailto:i.shevchenko at imperial.ac.uk>> wrote:

That's right, I can do it. In fact, this is what I do to start the model from given initial conditions.
What I can't figure out, where there is a possability to specify, say 4 initial conditions, and pick them up at different moments in time (say t=0, 5, 10, 15 as in the example below) without stopping the simulation?

&PARM05
bathyFile       = 'bathy.bin',
hydrogThetaFile = 'Theta.0',
hydrogSaltFile  = 'Salt.0',
uVelInitFile    = 'Uvel.0',
vVelInitFile    = 'Vvel.0',
pSurfInitFile   = 'Eta.0',

bathyFile       = 'bathy.bin',
hydrogThetaFile = 'Theta.5',
hydrogSaltFile  = 'Salt.5',
uVelInitFile    = 'Uvel.5,
vVelInitFile    = 'Vvel.5',
pSurfInitFile   = 'Eta.5',

bathyFile       = 'bathy.bin',
hydrogThetaFile = 'Theta.10',
hydrogSaltFile  = 'Salt.10',
uVelInitFile    = 'Uvel.10,
vVelInitFile    = 'Vvel.10',
pSurfInitFile   = 'Eta.10',

bathyFile       = 'bathy.bin',
hydrogThetaFile = 'Theta.15',
hydrogSaltFile  = 'Salt.15',
uVelInitFile    = 'Uvel.15,
vVelInitFile    = 'Vvel.15',
pSurfInitFile   = 'Eta.15',


________________________________________
From: MITgcm-support <mitgcm-support-bounces at mitgcm.org<mailto:mitgcm-support-bounces at mitgcm.org>> on behalf of Dimitris Menemenlis <dmenemenlis at gmail.com<mailto:dmenemenlis at gmail.com>>
Sent: 02 April 2020 19:03
To: MITgcm Support
Subject: Re: [MITgcm-support] [EXTERNAL] How to start from given initial conditions without restarting the simulation

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you can specify these fields in data PARM05 directly, e.g.,

# Input datasets
&PARM05
bathyFile       = 'bathy.bin',
hydrogThetaFile = 'Theta.0005184000',
hydrogSaltFile  = 'Salt.0005184000',
uVelInitFile    = 'Uvel.0005184000',
vVelInitFile    = 'Vvel.0005184000',
pSurfInitFile   = 'Eta.0005184000',
/

then MITgcm will initialize the other fields automatically

On Apr 2, 2020, at 10:50 AM, Shevchenko, Igor <i.shevchenko at imperial.ac.uk<mailto:i.shevchenko at imperial.ac.uk><mailto:i.shevchenko at imperial.ac.uk>> wrote:

Surely, I can do it, but the problem is that the new initial condition is just a set of fields for U, V, T, S, and Eta, while the pickup file requires much more than that.

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