[MITgcm-support] how long is a year? & monthly mean forcing

[Jonny Williams]

Thanks a lot for that Martin! Does my implementation of the monthly mean
forcing look correct to you?

Thanks again

Jonny


On 11 April 2014 15:11, Martin Losch <Martin.Losch at awi.de> wrote:

> Hi Jonny,
>
> if your calendar (see data.cal) is "gregorian", then it is 365 and 366 in
> leap years. So the average year is 365.25, but you'll get into trouble with
> these assumptions at the turn of a century, when leap years are skipped
> (except for millenia ...)
>
> Your parameters make the model believe that there are twelve records that
> repeat each year (climatological seasons).
>
> Martin
>
>
> On Apr 11, 2014, at 3:57 PM, Jonny Williams <Jonny.Williams at bristol.ac.uk>
> wrote:
>
> > Hi everyone
> >
> > I've got a couple of (hopefully) quick questions.
> >       * In the MITgcm, how long is a year? Is it 365 or 365.25 days?
> >       * I want to use monthly mean forcing for the EXF and OBCS
> packages. As far as I can tell, I need to use the format in my data.exf
> file which I have copied and pasted below. Is this correct?
> >  &EXF_NML_01
> >  ...
> >  precipstartdate1  = 19790101,
> >  precipstartdate2  = 000000,
> >  precipperiod      = -12.,
> >  atempstartdate1   = 19790101,
> >  atempstartdate2   = 000000,
> >  atempperiod       = -12.,
> >  aqhstartdate1     = 19790101,
> >  aqhstartdate2     = 000000,
> >  aqhperiod         = -12.,
> >  swdownstartdate1  = 19790101,
> >  swdownstartdate2  = 000000,
> >  swdownperiod      = -12.,
> >  lwdownstartdate1  = 19790101,
> >  lwdownstartdate2  = 000000,
> >  lwdownperiod      = -12.,
> >  uwindstartdate1   = 19790101,
> >  uwindstartdate2   = 000000,
> >  uwindperiod       = -12.,
> >  vwindstartdate1   = 19790101,
> >  vwindstartdate2   = 000000,
> >  vwindperiod       = -12.,
> >
> > and
> >
> > &EXF_NML_OBCS
> >   obcsNstartdate1   = 19790101,
> >   obcsNstartdate2   = 00000,
> >   obcsNperiod       = -12.,
> > #
> >   obcsSstartdate1   = 19790101,
> >   obcsSstartdate2   = 00000,
> >   obcsSperiod       = -12.,
> > #
> >   obcsWstartdate1   = 19790101,
> >   obcsWstartdate2   = 00000,
> >   obcsWperiod       = -12.,
> > #
> >   obcsEstartdate1   = 19790101,
> >   obcsEstartdate2   = 00000,
> >   obcsEperiod       = -12.,
> >
> >  &
> >
> > Many thanks!
> >
> > Jonny
> >
> > --
> > Dr Jonny Williams
> > School of Geographical Sciences
> > University of Bristol
> > University Road
> > BS8 1SS
> >
> > +44 (0)117 3318352
> > jonny.williams at bristol.ac.uk
> > bit.ly/jonnywilliams
> > _______________________________________________
> > MITgcm-support mailing list
> > MITgcm-support at mitgcm.org
> > http://mitgcm.org/mailman/listinfo/mitgcm-support
>
>
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-- 
Dr Jonny Williams
School of Geographical Sciences
University of Bristol
University Road
BS8 1SS

+44 (0)117 3318352
jonny.williams at bristol.ac.uk
bit.ly/jonnywilliams
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