[MITgcm-devel] changing offline_exf_seaice

[Gael Forget]

Cool. That was it. The results look
Much simpler when I remove those
Highly heterogeous ocean velocities.
I guess those were meant for dyn test.
Cheers,
Gael

Sent from my iPhone

On Dec 17, 2012, at 15:40, Jean-Michel Campin <jmc at ocean.mit.edu> wrote:

> Hi Gael,
> 
> Would be good to talk about this when you pass by MIT.
> Did not look at our plots yet (but I did many previously),
> and likely related to ocean current which influence
> the exchange coeff between ice and sea-water.
> 
> Cheers,
> Jean-Michel
> 
> On Mon, Dec 17, 2012 at 02:06:46PM -0500, Gael Forget wrote:
>> Hi Jean Michel,
>> 
>> the input.thermo experiment is getting there. 
>> 
>> I am a little puzzled by the input.thsice experiment results though. 
>> They turn out much more complicated than expected, given 
>> our simple experiment design. I dont understand why 
>> the viscinity of the coast influences the result as it does. 
>> See e.g. the ocean temperature at day 5 (bottom right 
>> panel in attached plot). There should be no horizontal 
>> flux in our simple problem design, right? So where 
>> is that behavior coming from? Is there an implied 
>> diffusion of some sort in the thsice thermodynamics?
>> 
>> I looked a little at thsice parameters and codes but I dont get it. 
>> The input.thermo results are much more homogeneous in y.
>> I must be missing something.
>> 
>> Cheers,
>> Gael
>> 
> 
> 
>> 
>> 
>> On Dec 6, 2012, at 8:41 PM, Jean-Michel Campin wrote:
>> 
>>> Hi,
>>> 
>>> I would like to change the test experiment "offline_exf_seaice",
>>> to use a re-entrant channel with idealized costline (based on the
>>> set-up I put few weeks ago in http://mitgcm.org/~jmc/icedyn_v02.tar.gz)
>>> If things go well, would like to start the changes tomorrow (Friday)
>>> with only the forward set-up for now.
>>> 
>>> I propose the following forward tests:
>>> (1) input        : seaice-dynamics + thermodynamics and SST relaxation
>>>                  (to replace current offline_exf_seaice/input.seaice)
>>> (2) input.thsice : thermodynamics(pkg/thsice) and SST relaxation
>>> (3) input.thermo : thermodynamics(pkg/seaice) and SST relaxation
>>> (4) input.fixedSST : thermodynamics(pkg/seaice) and fixed SST
>>>                  (to replace current offline_exf_seaice/input.seaicetd)
>>> (5) input.dyn_lsr  : seaice-dynamics, using LSR
>>> (6) input.dyn_jfnk : seaice-dynamics, using JFNK
>>> (7) input.exf_bulk : no seaice, just bulk-formulae
>>>                  (to replace current offline_exf_seaice/input)
>>> 
>>> I think I have 2 & 5 ready to go. I need to put something for (1)
>>> (otherwise the other will not be tested), and as a temporary test,
>>> I was going to use thsice and LSR (as in 2 + 5) but this could be changed 
>>> later on.
>>> 
>>> Martin, when you have time, if you can take care of (6), it would be nice.
>>> One thing we could try is to test both pkg/seaice advection and 
>>> pkg/thsice advection in 5 & 6 (e.g., thsice in 5 ?).
>>> 
>>> Gael, I made several changes to the thermodynamic forcing you sent me,
>>> so that it fits thsice, it's also a stronger forcing (but once I add 
>>> the dynamics, it's still dominated by advection vs thermodynamic forcing),
>>> and I get immediately some places with surface melting and other places
>>> with melting and freezing from below.
>>> When you are back, we could talk about (3) and (4), and from there
>>> it should be easy to get (7) (+ update (1) ?).
>>> 
>>> Comments and suggestions are welcome (specially for dir name, since
>>> it's a pain to changed them with CVS).
>>> 
>>> Cheers,
>>> Jean-Michel
>>> 
>>> _______________________________________________
>>> MITgcm-devel mailing list
>>> MITgcm-devel at mitgcm.org
>>> http://mitgcm.org/mailman/listinfo/mitgcm-devel
>> 
> 
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