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

[Carlos Ross]

I'm having the same problem, I tried with wrf 3.4.1 and 3.6.1. As input
data I'm using FNL (dataset ds083.2), with the GFS vtable, which had worked
ok before.
So I've changed the domain, vertical levels, and nothing seems to work, so
I will try changing the input data to check if that's the problem.


2014-11-25 13:17 GMT-03:00 Dominikus Heinzeller <climbfuji at ymail.com>:

> 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
>
>
>
> _______________________________________________
> Wrf-users mailing list
> Wrf-users at ucar.edu
> http://mailman.ucar.edu/mailman/listinfo/wrf-users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/wrf-users/attachments/20141125/217490c0/attachment.html