[Wrf-users] Facing problems with real.exe (evert, p_top, max_dz)

Tue Nov 25 13:00:21 MST 2014

Hi Dom,

thank you to replay to my question soon.

I liked you hint, but how can I tell WRF to use the same 17 HadGEM-2 levels
(1000 925 850 700 600 500 400 300 250 200 150 100 70 50 30 20 10)? Could
you please tell me how to do that?

Another important thing you talk about is related to the number of forcing
data levels. In fact the number of HadGEM-2 levels is 17, but when I use
num_metgrid_levels = 17 the model stops real.exe and give me the message

input_wrf.F: SIZE MISMATCH input data ide,jee,num_metgrid_levels =
 150          200           18

which show that my met_em_files get 18 levels instead of the original ones
that is 17.

So, when I use num_metgrid_levels = 18 and e_vert=17 the model stops
telling me:

d01 2005-03-01_00:00:00 You need one of three things:

 d01 2005-03-01_00:00:00 1) More eta levels to reduce the dz: e_vert

 d01 2005-03-01_00:00:00 2) A lower p_top so your total height is reduced:
p_top_requested

 d01 2005-03-01_00:00:00 3) Increase the maximum allowable eta thickness:
max_dz

 d01 2005-03-01_00:00:00 All are name list options

And I am back to the original problem.

What are your recommendations?

I've attached my new namelist.input with these changes above and the use go
40 hPa to my model top.

José Augusto P. Veiga,

======================================
Coordenador do curso de Meteorologia da UEA
Universidade do Estado do Amazonas
Departamento de Meteorologia
Escola Superior de Tecnologia (EST)
-----------------------------------------------------------------------------
Av. Darcy Vargas, 1200, Manaus-AM Brasil
Work phone:    (92) 3878 4333, Ramal 4333
Cell   phone :    (92) 8196 7122
Skype: veiga_j.a.p.
-----------------------------------------------------------------------------
CV: http://lattes.cnpq.br/4027612512091565
URL:http://scientificmet.wordpress.com/
-----------------------------------------------------------------------------

On Tue, Nov 25, 2014 at 12:17 PM, Dominikus Heinzeller <climbfuji at ymail.com>
wrote:

> Hi Jose,
>
> why do you try to use the same number of vertical levels in your WRF runs
> as in the HadGEM2-ES input data? Try to set e_vert to something reasonable,
> i.e., for a 50hPa model top use something around 40.
>
> By the way, the HadGEM2-ES data on the ESGF nodes has 17 pressure levels
> (for variable zg), other variables are on 38 model levels (hybrid height
> coordinate).
>
> Cheers
>
> Dom
>
>
> On 25/11/2014, at 2:18 pm, Jose Augusto Paixão Veiga <veiga.uea at gmail.com>
> wrote:
>
> Dear users,
>
> I am forcing WRF (version 3.5) with HadGEM-2 data and in my small test
> with 36 hours I've successfully built the met_em_d* files during the
> pre-processing.  However, I've been failing to create the appropriate
> boundary conditions to further run the model.
>
> The error message bellow arises as soon as I run the real.exe program:
>
>
>  Using sfcprs  to compute psfc
>  d01 2005-03-01_00:00:00 You need one of three things:
>  d01 2005-03-01_00:00:00 1) More eta levels to reduce the dz: e_vert
>  d01 2005-03-01_00:00:00 2) A lower p_top so your total height is reduced:
> p_top_requested
>  d01 2005-03-01_00:00:00 3) Increase the maximum allowable eta thickness:
> max_dz
>  d01 2005-03-01_00:00:00 All are namelist options
>  -------------- FATAL CALLED ---------------
>  FATAL CALLED FROM FILE:  <stdin>  LINE:    5779
>  dz above fixed eta levels is too large
>  -------------------------------------------
> [0] MPI Abort by user Aborting program !
> [0] Aborting program!
>
>
> As 18 is the number of HadGEM-2 levels, I've testing different e_vert
> values in the namelist.input file (ex: 19, 20,....22) but the error still
> persisted. I've get attached the namelist.input file for some check.
>
> So, after some frustrating tests with e_vert I've decided to chance ptop
> values, but the error message persist. The only case I successfully run
> real.exe was after have set ptop=50000 (500 hPa) which does not fit my
> needs.
>
> I didn't test with max_dz as I had not find where it is to be modified.
>
> So, I really appreciate if someone could help me on this issue.
>
>
> José Augusto P. Veiga,
>
> ======================================
> Coordenador do curso de Meteorologia da UEA
> Universidade do Estado do Amazonas
> Departamento de Meteorologia
> Escola Superior de Tecnologia (EST)
>
> -----------------------------------------------------------------------------
> Av. Darcy Vargas, 1200, Manaus-AM Brasil
> Work phone:    (92) 3878 4333, Ramal 4333
> Cell   phone :    (92) 8196 7122
> Skype: veiga_j.a.p.
>
> -----------------------------------------------------------------------------
> CV: http://lattes.cnpq.br/4027612512091565
> URL:http://scientificmet.wordpress.com/
>
> -----------------------------------------------------------------------------
>
>
>
>  <namelist.input>_______________________________________________
> Wrf-users mailing list
> Wrf-users at ucar.edu
> http://mailman.ucar.edu/mailman/listinfo/wrf-users
>
>
>
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