[MITgcm-support] Bulk Force and SSS restoring

[Amato Evan]

Hi Stefano!

I was hoping to use the model calendar (just b/c it's more  
straightforward) and as far as I can tell, if one uses EXF then  
calendar has to be set to "Gregorian". Is this right?

I should say that another reason for only restoring to SSS is that  
this is how I have spun up the model, so I'd like to stay consistent  
on this front as well.

Thanks for your time, I really appreciate it!

Sincerely,
Amato

On Feb 17, 2010, at 4:37 AM, Stefano Querin wrote:

> Hi Amato,
>
> just a few ideas...
>
> Have you ever tried to use the EXF package for your simulations? It
> should be more complete and flexible than the BULK_FORCE package. You
> can also restore SSS to prescribed values with it.
>
> I don't think that the computation of freshwater fluxes using runoff
> and precipitation input files makes the model run that slow... (but
> I'm just relying on my experience, I never made any test regarding
> this). On the contrary, if you meant that the creation and handling
> (offline) of runoff and precip files is somehow cumbersome and slow,
> then SSS restoring should be a more desirable choice.
>
> Anyway, the EXF package has many available options.
>
> Hope this helps...
>
> Cheers!
>
> S.
>
>
>
> On 16 Feb 2010, at 19:50:23, Amato Evan wrote:
>
>> Hello Everyone,
>>
>> I am trying to estimate the effect of surface forcing by volcanic-
>> aerosols on tropical SST. To do this I have a 1x1 degree model setup
>> w/23 vertical levels. After spining up the model for 130 years using
>> NCEP and WOA data (and SSS restoring), I would like to "turn-on" the
>> BULK_FORCE package in order to change downward lw & sw fluxes in
>> accordance with volcanic aerosol surface forcing (something I
>> calculate offline w/satellite obs. and an RT model).
>>
>> I am giving the BULK_FORCE pkg wind stress values (calcWindStress
>> = .FALSE.), but I would like to run w/surface salinity restoring,
>> and not have the model calculate freshwater fluxes using runoff and
>> precip input files. My motivation is just to make the model runs
>> complete more quickly. What I can't determine from the documentation
>> and source code is if I leave:
>>
>> RainFile= ' ',
>> RunoffFile= ' ',
>> EmPFile= ' ',
>>
>> in data.blk, will bulk_force just restore to surface salinity on the
>> time scales I define in "data"? If anyone has experience with this,
>> I would really appreciate input. Also, the contents of build/,
>> code/, and input/ for my setup can be found here:
>>
>> http://trane.evsc.virginia.edu/mitgcm/
>>
>> If anyone is so inclined to look them over.
>>
>> Thanks!
>>
>> Sincerely,
>> Amato
>>
>> ---
>> Amato Evan
>> Asst. Professor
>> Dept. of Environmental Sciences
>> University of Virginia
>> 434.243.7711
>> aevan at virginia.edu
>> http://trane.evsc.virginia.edu
>>
>>
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---
Amato Evan
Asst. Professor
Dept. of Environmental Sciences
University of Virginia
434.243.7711
aevan at virginia.edu
http://trane.evsc.virginia.edu