[Wrf-users] Vtable update for new GFS data

Thu Jan 22 07:51:09 MST 2015

That's right Julio, now with 0.25p you can nest starting from 9Km

2015-01-19 12:54 GMT-03:00 Julio Castro <julio.castro at arcadis.cl>:

>  Dear Users,
>
>
>
> I have a question related to the GFS data change and the new highest
> horizontal grid resolution data mentioned on the email below. It will be
> advisable to model with a finer grid resolution first domain to save
> computational resources or is not the case?
>
>
>
> Let’s say use a 9 km, 3 km, 1 km  three domains nesting instead of a 27,
> km 9 km, 3 km, 1 km four domain nesting
>
>
>
>
>
> Many thanks
>
>
>
> *Julio Castro M.* | Especialista Senior en Calidad de Aire |
> julio.castro at arcadis.cl
>
> ARCADIS Chile | Antonio Varas #621| Providencia
>
> CP 7500655 | Santiago | Chile
>
> T. + 56 2 2 3816248 | F. + 56 2 2 3816001
>
> www.arcadis.cl
>
>
>
> ARCADIS, Imagine the result
>
> *Antes de imprimir este correo piense bien si es necesario. ARCADIS por un
> mundo sustentable.*
>
>
>
> *De:* wrf-users-bounces at ucar.edu [mailto:wrf-users-bounces at ucar.edu] *En
> nombre de *Masters.Steve
> *Enviado el:* martes, 11 de noviembre de 2014 11:44
> *Para:* wrf-users at ucar.edu
> *Asunto:* [Wrf-users] Vtable update for new GFS data
>
>
>
> The GFS data files will be updated next month probably around 17 December
> 2014, with changes to the filenames and the addition of
> 0.25-degree-resolution data.  See
> http://www.nws.noaa.gov/om/notification/tin14-46gfs.htm for the
> announcement.  Most importantly for WRF users, the soil temperature
> representation within the grib2 file is being changed.  From the
> announcement:
>
>
>
> Rename TMP at 0-0.1 m, 0.1-0.4 m, 0.4-1.0 m, and 1-2 m to the more accurate
> name of Soil Temperature (TSOIL)
>
>
>
> This will require a change to the Vtable.GFS file for the ungrib program
> to pick up the renamed fields.  Based on testing of the parallel data that
> is currently being posted, here are the changes to the Vtable.GFS that you
> need to make:
>
>
>
> From the current Vtable.GFS …..
>
> 11 | 112  |   0  |  10  | ST000010 | K       | T 0-10 cm below ground
> layer (Upper)    |  0  |  0  |  0  | 106 |
>
> 11 | 112  |  10  |  40  | ST010040 | K       | T 10-40 cm below ground
> layer (Upper)   |  0  |  0  |  0  | 106 |
>
> 11 | 112  |  40  | 100  | ST040100 | K       | T 40-100 cm below ground
> layer (Upper)  |  0  |  0  |  0  | 106 |
>
> 11 | 112  | 100  | 200  | ST100200 | K       | T 100-200 cm below ground
> layer (Bottom)|  0  |  0  |  0  | 106 |
>
> 11 | 112  |  10  | 200  | ST010200 | K       | T 10-200 cm below ground
> layer (Bottom) |  0  |  0  |  0  | 106 |
>
>
>
> The updated Vtable.GFS lines….
>
> 11 | 112  |   0  |  10  | ST000010 | K       | T 0-10 cm below ground
> layer (Upper)    |  2  |  0  |  2  | 106 |
>
> 11 | 112  |  10  |  40  | ST010040 | K       | T 10-40 cm below ground
> layer (Upper)   |  2  |  0  |  2  | 106 |
>
> 11 | 112  |  40  | 100  | ST040100 | K       | T 40-100 cm below ground
> layer (Upper)  |  2  |  0  |  2  | 106 |
>
> 11 | 112  | 100  | 200  | ST100200 | K       | T 100-200 cm below ground
> layer (Bottom)|  2  |  0  |  2  | 106 |
>
> 11 | 112  |  10  | 200  | ST010200 | K       | T 10-200 cm below ground
> layer (Bottom) |  0  |  0  |  2  | 106 |
>
>
>
> The other lines in the should remain the same.
>
>
>
> I’ve made a single test run with the new Vtable that appeared to complete
> successfully.  Without this change, ungrib does not pick up the soil
> temperature and your WRF job may fail.  Further testing by users is
> certainly called for using the parallel data being posted by NCEP before
> the new data goes operational next month.
>
>
>
>
>
> *Stephen Masters*
>
> *Senior Staff Scientist*
>
> masters.steve at ensco.com
>
> 321-775-7548 (o)
>
> 321-254-3293 (f)
>
> 4849 North Wickham Road
> Melbourne, FL 32940
>
> www.ensco.com
>
>
>
> [image: ENSCO, Inc.]
>
> *Innovation. Collaboration. Solutions. **Success.*
>
>
>
>
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-- 
Claudio Cortes N.
Project Engineer
Environmental Area
MICOMO S.A.
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