Re: wrf_td

Brandon,

I think your version of NCL is too old. This function was added
probably in version 4.3.1. Try upgrading to the current version,
5.0.0, or else you can wait a couple of weeks for 5.1.0.

--Mary

On Feb 12, 2009, at 1:43 PM, Brandon Fisel wrote:

> Hi,
>
> I'm receiving a fatal error:
> fatal:Undefined identifier: (wrf_td) is undefined, can't continue
> fatal:Execute: Error occurred at or near line 532 in file /
> WRFUserARW.ncl
> fatal:Execute: Error occurred at or near line 507 in file
> wrfout_to_nc.ncl
>
> The line in my WRFUserARW.ncl is as follows:
> if( variable .eq. "td2" ) then
> ;; function wrf_td needs qv and pressure (Pa) on input and
> returns dewpoint temperature on return
> Q2 = nc_file->Q2(time,:,:)
>
>
> Q2 = Q2 > 0.0
> P = nc_file->P(time,0,:,:) ; get only the lowest
> level, to match Q2
> PB = nc_file->PB(time,0,:,:) ; get only the lowest
> level, to match Q2
> p = P + PB
>
>
> td2 = wrf_td( p , Q2 )
> td2_at_description = "2m Dewpoint Temperature" ; Overwrite
> return description
> return(td2)
> end if
>
> The line in the wrfout_to_nc.ncl, which is similar to the script
> found at http://www.mmm.ucar.edu/wrf/src/utils/wrfout_to_cf.ncl is:
> if (out2dMet_at_Td_2m) then
> Td_2m(n,:,:) = (/wrf_user_getvar(wrfout,"td2",n)/)
> end if
>
> I have looked around inside the libraries and haven't found the
> function wrf_td to be defined anywhere. I've tried creating the
> function inside the WRFUserARW.ncl script that was similar to:
> function wrf_td ( P:numeric, qv:numeric );
> however, this led to an additional error where NCL was expecting a
> 'begin' or 'local'.
>
> Am I on the right track and if so how else can I define wrf_td?
>
> FYI: The version of NCL is v4.2.0.a034.
>
> Cheers,
>
>
> Brandon Fisel
> _______________________________________________
> ncl-talk mailing list
> List instructions, subscriber options, unsubscribe:
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk

_______________________________________________
ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Thu Feb 12 2009 - 14:02:47 MST