[MITgcm-support] using EXF with monthly data and pkg cal gregorian

[Martin Losch]

Hi Jeff, 

I normally compute the “monthly” period as a twelveth of a “mean year” = (365*3 + 366)/4 * 86400/12 = 2629800.0, more accurately you could use the average year of 2012-2019.
The start date should be in the middle of the 1st month (startdate = 00000115, with yearly fields your don’t need the year in this)

Martin

> On 29. Oct 2020, at 15:47, Jeffery R Scott <jscott at mit.edu> wrote:
> 
> Hi,
> 
> I’m using EXF with hourly reanalysis for a bunch of fields (e.g., 2m SAT etc) over the period 2012-2019,
> using gregorian calendar in data.cal. I have useExfYearlyFields=TRUE. No problem thus far.
> 
> However, now I want to turn on SST restoring using monthly SST files over this period.
> (individual SST files over 2012-2019)
> 
> Is there a smart way to do this in data.exf (tried fiddling with a mid-month startdate1/startdate2, won’t seem to work),
> given my calendar choice? Is my only recourse here to make SST files with say daily frequency (doing the time interpolation processing myself)
> for each year? (the pkg/exf and pkg/cal logic seems a bit tricky and mysterious…)
> 
> Thanks,
> Jeff
> 
> 
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