[MITgcm-support] how to run for exactly 1 month with calendarDumps

[Dimitris Menemenlis]

Hi Ryan, hopefully someone will have better answer.
Typically what I do is run the model as long as possible,
until end of job or machine crashes, then use a script like
http://wwwcvs.mitgcm.org/viewvc/MITgcm/MITgcm_contrib/high_res_cube/input/modpickup
to pick-up pieces from latest available rotating pickup.

Dimitris Menemenlis

On 09/18/2017 10:04 AM, Ryan Abernathey wrote:
> Hi,
> 
> I am new to doing "realistic" simulations with the cal package 
> activated. I would like to run for one calendar month and then dump 
> diagnostics and pickup files. I will then restart from pickup and run 
> the next month, etc., for many years.
> 
> I am using the following data.cal
> 
>   &CAL_NML
>   TheCalendar='gregorian',
>   startDate_1=20100101,
>   startDate_2=000000,
>   calendarDumps = .TRUE.,
>   &
> 
> I understand that calendarDumps causes chkPtFreq, pChkPtFreq, taveFreq, 
> etc. to automatically conform their output to one calendar month if I 
> set chkptFreq  = 259200.0.
> 
> My question is: how to I make the model stop running after exactly one 
> month, given that the length of a month is variable?
> 
> The two options I am familiar with for setting the length of the run 
> are nTimeSteps or endTime. I don't want to manually specify the endTime 
> after each run, and anyway, that would be hard because I would need to 
> account for the variable month length. Alternatively, I could just 
> always run for 31 days, but this would waste some computer time for 30 
> and 28-day months. (A small amount, but the model is quite expensive 
> already.)
> 
> What do people commonly do in this situation?
> 
> Thanks for the help!
> 
> -Ryan
> 
> 
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