Re: [ncl-talk] Crosspost: OPeNDAP PyNGL WRF example / WRF post processing NCL -> PyNGL

On Wed, 23 Aug 2006, Rob Cermak wrote:

> I have finally put together the an example script utilizing WRF
> output data via OPeNDAP.
>
> Script: http://137.229.40.27/data/tmp/pyngl/wrf_dap.py
>
> Uses pyDAP 2.1.6
>
> Graphics:
> http://137.229.40.27/data/tmp/pyngl/wrf-0.png
> http://137.229.40.27/data/tmp/pyngl/wrf-1.png
> http://137.229.40.27/data/tmp/pyngl/wrf-2.png
> http://137.229.40.27/data/tmp/pyngl/wrf-3.png
> http://137.229.40.27/data/tmp/pyngl/wrf-4.png
>
> This script is based off of the existing example script: ngl02p.py
>
> This should allow you to connect and display any data from DODS/DAP
> type servers as long as you provide a URL. IE: Unidata's Motherlode
> THREDDS server, NCEP's NOMADS or Coast/OceanWatch DAP type servers.

Hi Rob,

Nice work on putting this all together. We've been meaning to check
out PyDAP ourselves, so you saved us a step. The images look good;
did you use ImageMagick's convert to convert them to PNG?

> There is a WRF-NCL script kit that displays a lot of base parameters
> and derived values. wrf_ncl-2.1.tar.gz
>
> I was wondering if there were any efforts going into porting these
> scripts to pyNGL for post-processing? If so, I would like to know
> and help!

I'm not sure which scripts you are talking about here. Can you provide
me with the wrf_ncl-2.1.tar.gz file?

We have been working on building some of the WRF data analysis
functions into NCL, and these could be easily done at the PyNGL
level. However, if you are talking about graphical functions, I will
need to take a look at them.

> We have interest in generating additional derived parameters like
> freezing level, mean sea level pressure... in addition to those in
> the wrf_ncl scripts.
>
> The stumbling block is porting the one fortran code to a python
> module or just redoing the code in python (Numeric):
> wrf_user_fortran_util_0.f

This is the one I believe we are doing at the NCL level, and could have
this done for PyNGL as well. Can you send me the version of
the wrf_user_fortran_util_0.f file that you have, and I'll compare it
with ours?

> If there is a pyNGL port of the NCL scripts going on, please let us
> know. If not, we will be likely launching into an individual port
> of this kit to pyNGL in the next few weeks. Help would be
> appreciated.

We'll see what we can do, once I have a look at these scripts. Time
may be somewhat of a factor, since we are focused on getting a new
release of NCL out the door in September.

Cheers,

--Mary

> Rob
>

> --
> Alaska Ocean Observing System
> Database Manager
> 907-474-7948
>
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Received on Thu Aug 24 2006 - 11:31:18 MDT