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

[Jody Klymak]

Hi Ryan,

I’ve not done this at all, but it seems a script to manually specify 
startTime and endTime wouldn’t be too hard.  I parse the `data` file 
all the time when I want to do automatic runs like this.  I use python, 
but I’m sure clever people can use bash and awk or sed.

Cheers,   Jody

On 18 Sep 2017, at 10:04, 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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> MITgcm-support at mitgcm.org
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