[RegCNET] underestimated diurnal temperature range montly means?

[Moetasim Ashfaq]

For now you may use Bi's code. I will fix the TMIN/TMAX averaging in postproc in
couple of days.

Moet



Quoting Matteo Zampieri <M.Zampieri at isac.cnr.it>:

> Hi Xunqiang,
> 
> thank you very much for your kind reply
> 
> I'm using the standard postprocessing (postproc.f)
> 
> maybe there is something wrong in the settings of
> my postproc.in, which is:
> 
> 1994010100,     ! idate0 = First date in File (yymmddhh)
> 1994010100,     ! idate1 = Start date for averaging and re-writing
> 1995010100,     ! idate2 = End date for averaging and re-writing
> 2,              ! iotype: 1=I*2 NetCDF; 2=r*4 NetCDF; 3=grads; 4=vis5d
> .false.,        ! plv
> .false.,        !
> .false.,        ! Write out header?
> .false.,        ! Write out all RegCM data b/twn idate1 & idate2?
> .false.,        ! Average RegCM data b/twn idate1 & idate2?
> .false.,        ! Diurnali avg of RegCM data b/twn idate1 & idate2?
> .true.,         ! Continually average ATM data b/twn idate1 & idate2?
> -1.,            ! No. Days for continual averaging
> (-1=monthly;1=daily;5=5day)
> etc
> 
> or is it ok?
> 
> thank you very much in advance
> 
> bests,
> Matteo
> 
> >
> > Hi, Matteo:
> >
> > I guess that the way of your calculation might not be correct.
> >
> > Which way you used ?
> >
> > If you like, you can try my postproc (DAY_SRF.f under
> > RegCM/Commons/DAY_MONTH),
> >
> > Suppose you output SRF fields every 3 hour. then in SRF.yyyymmddhh
> > file, you have 8 time slices in one day. The right way to calculate
> > TAMAX is find the maximum among the 8 time slices firstly, then
> > do the average of those maximun to get the monthly mean.
> >
> > You should do for TAMIN in a similar way. Then calculate the
> > TGMAX - TGMIN. I am sure you should get the magnitude greater than 1K.
> >
> > Best regards,
> > Xunqiang Bi
> >
> >
> > On Mon, 2 Jul 2007, Matteo Zampieri wrote:
> >
> >> Hi All,
> >>
> >> I'm using RegCM over Europe, I'm doing an hindcast for year 1994
> >> using a similar configuration of the Practice Run but with a wider
> >> area and using ERA40 as boundary conditions (domain.param is attached)
> >>
> >> I think that the model diurnal temporal range, computed as TAMAX-TAMIN
> >> from the SFR file after montly means are computed, is underestimated.
> >>
> >> I'm attaching two plots showing the mean diurnal temporal range for
> >> january and august. In January, in Central Europe, it is only 1 K
> >>
> >> Maybe a possible reason could be that tamax and tamin are computed from
> >> the 4-hourly model output but I don't think it is enough to explain
> >> this behaviour
> >>
> >> thank you very much to anyone can help me!
> >>
> >> bests,
> >> Matteo
> >>
> >> ---------------------------------------------
> >> Matteo Zampieri
> >> ISAC-CNR
> >> Strada Prov. Lecce-Monteroni km 1.2
> >> 73100 LECCE (IT)
> >> email: M.Zampieri at isac.cnr.it - @lmd.ens.fr
> >> Tel: +39 0832 29 7105 - Fax: +39 0832 29 7547
> >> ---------------------------------------------
> >
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >    Dr. Xunqiang Bi         email:bixq at ictp.it
> >    Earth System Physics Group
> >    The Abdus Salam ICTP
> >    Strada Costiera, 11
> >    P.O. BOX 586, 34100 Trieste, ITALY
> >    Tel: +39-040-2240302  Fax: +39-040-2240449
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >
> 
> 
> _______________________________________________
> RegCNET mailing list
> RegCNET at lists.ictp.it
> https://lists.ictp.it/mailman/listinfo/regcnet
>