[NARCCAP-discuss] HRM3-GFDL future time data

[Walters, Kelli Michelle]

Seth,

Thanks for the information. I thought I had read that they used a gregorian
calendar. Now the dates make sense.

Thank you!
Kelli

--
*Kelli Walters, *EIT
M.S. Candidate
Civil Engineering | Water Resources
Oregon State University
Office: Owen 233
Email: waltersk at onid.oregonstate.edu
Cell: 503.869.5118


On Tue, Apr 29, 2014 at 6:56 PM, Seth McGinnis <mcginnis at ucar.edu> wrote:

> Hi Kelli,
>
> The CCSM, CGCM3, and GFDL GCMs use a 365-day calendar, which doesn't
> have leap years.  There are 17 leap years between 1968 and 2038, so
> Excel's calculation of the date (which uses a standard calendar that
> *does* have leap years) is off by 17 days.
>
> The starting date is really 2038-01-01.  Note that the ending dates are
> actually 2070-12-31, because there are 8 leap years between 2038 and
> 2070, so the time span is actually 8 days shorter than you'd expect if
> you used a standard calendar.
>
> (The situation with the HadCM3-driven runs is even worse, because HadCM3
> uses a 360-day calendar.)
>
> Details and more information, including some important notes about
> ragged end points and the spin-up period, are available on our website:
>
> http://narccap.ucar.edu/about/time-periods.html
>
> Cheers,
>
> --Seth
>
>
> On 4/29/2014 5:03 PM, Walters, Kelli Michelle wrote:
> > Hi Seth and NARCCAP users,
> >
> > I am using the HRM3-GFDL future data (precip) and noticed that the future
> > dataset seems to start on 12/15/2037 instead of 01/01/2038 like all the
> > rest of the models. The other models I am using state that the time
> starts
> > counting from 1/1/2038, but the HRM3-GFDL model says that it starts at
> > 01/01/1968 (like for the current data). When I add the time value to that
> > start date, the data begins at 12/15/2037.
> >
> > If I bump the data to begin on 01/01/2038 like the other models, then it
> > ends on 12/23/2070 like the other models as well, which leads me to
> believe
> > the starting date is just off.
> >
> > Does anyone know if the date information was somehow shifted or should it
> > really be starting on 12/15/2037? Or am I maybe calculating something
> wrong
> > with the dates? I am just using excel to add the date value (ex. 25551)
> to
> > the starting date.
> >
> > Any help or information is appreciated.
> > Thank you,
> > Kelli
> >
> > --
> > *Kelli Walters, *EIT
> > M.S. Candidate
> > Civil Engineering | Water Resources
> > Oregon State University
> > Office: Owen 233
> > Email: waltersk at onid.oregonstate.edu
> > Cell: 503.869.5118
> > _______________________________________________
> > narccap-discuss mailing list
> > narccap-discuss at mailman.ucar.edu
> > http://mailman.ucar.edu/mailman/listinfo/narccap-discuss
> >
> _______________________________________________
> narccap-discuss mailing list
> narccap-discuss at mailman.ucar.edu
> http://mailman.ucar.edu/mailman/listinfo/narccap-discuss
>