Re: [idvusers] Generating constant pressure variables for IDV

• To: "Kemp, Eric M." <Eric.Kemp@xxxxxxx>
• Subject: Re: [idvusers] Generating constant pressure variables for IDV
• From: Don Murray <dmurray@xxxxxxxxxxxxxxxx>
• Date: Fri, 31 Oct 2008 14:02:03 -0600

Hi Eric-

Kemp, Eric M. wrote:

I am trying to interpolate variables from a WRF simulation to constant
pressure surfaces for used with IDV.  I know that WPP performs this function,
but the output is in GRIB format and I want to calculate some non-standard
variables.  So I'm trying to decide on the best course of action.

My questions:

1.  Can IDV be supplied with a user-defined GRIB table to properly decode
my non-standard variables?  If so, I may choose to edit the WPP program.
If not:

You can add in your own grib tables. Documentation on this is at:

http://www.unidata.ucar.edu/software/idv/docs/userguide/data/GribTables.html

2.  Can IDV read a netCDF file that contains data both in "WRF format" (with
data on model surfaces) as well as data on isobaric surfaces?  If so,
what is the procedure?  If not:

No, I doubt this would work.  We use the WRF netCDF spec to determine
the vertical and horizonatal coordinates.

3.  Should I write out the isobaric variable in a CF1 convention netCDF file?

You could do this and the IDV should be able to handle it.

Don Murray
*************************************************************
Don Murray                               UCAR Unidata Program
dmurray@xxxxxxxxxxxxxxxx                        P.O. Box 3000
(303) 497-8628                              Boulder, CO 80307
http://www.unidata.ucar.edu/staff/donm
*************************************************************

• References:
  • [idvusers] Generating constant pressure variables for IDV
    • From: Kemp, Eric M.