Re: Re: [ncl-talk] tips to unstagger data from WRF

Gerry Creager <gerry.creager_at_tamu.edu> schrieb am 12/11/2007 02:03:49 PM:

> Jan Ploski wrote:
> > ncl-talk-bounces_at_ucar.edu schrieb am 12/11/2007 12:46:43 AM:
> >
> >> I am trying to look at 700 mb winds. Correct me if I am wrong but to
do
> > this
> >> brings in an extra step of interpolating to pressure level using
WRF-NCL
> >> code.
> >> So first I have to interpolate the data usingthe wrf_interp-3d
function
> > and
> >> then use the " wrf_uvmet" function?
> >
> > Hello,
> >
> > This task is certainly doable with NCL alone. However, we solved it
(for
> > computing wind velocity at a given relative height above the terrain
> > surface) in two steps:
> >
> > 1. Run NCEP WRF Postprocessor on the WRF output to destagger and
extract
> > U, V WIND ON MDL SFCS, HEIGHT ON MDL SFCS, SURFACE HEIGHT.
> > 2. Read in the resulting GRIB file with NCL and interpolate to a
desired
> > height using wrf_interp_3d_z.
> >
> > I think you could do much the same for "ON PRESS SFCS".
>
> Does this work for ARW as well as NMM? I was under the impression the
> Postprocessor was only for NMM code.

The NMM postprocessor and the described method both work for ARW (this is
what we are using).

The documentation is at
http://www.dtcenter.org/wrf-nmm/users/docs/user_guide/WPS/users_guide_nmm_chap7_v1_WPS.htm

Best regards,
Jan Ploski

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