[Wrf-users] same run - different results?

[Francisco SALAMANCA PALOU]

Hi Elena,
When the number of processors is different and the results are different
(and everything is the same) is not a problem of WRF.
Probably You do not have your cluster properly configured to run WRF or you
need to modify your job script.
Best
Francisco


On Fri, Nov 2, 2012 at 11:30 AM, Brian Jewett <jewett at atmos.uiuc.edu> wrote:

> We've experienced different results on different sets of processors on the
> same machine, using the same executable (this was an earlier, 3.1.1 version
> of wrf).
>
>
> ----- Original Message -----
> | Was everything else the same? Same number of processors? Same exact
> | set of processors? Same run directory? Same wrf.exe executable? Same
> | environment variables?
> |
> |
> |
> | Sent from my phone.
> |
> |
> | -----Original Message-----
> | From: Elena Maria Pison San Pedro [ emp at dhi.com.sg ]
> | Sent: Friday, November 02, 2012 03:40 AM Mountain Standard Time
> | To: wrfhelp at ucar.edu
> | Cc: wrf-users at ucar.edu
> | Subject: same run - different results?
> |
> |
> |
> |
> |
> |
> | Hi,
> |
> |
> |
> | I was surprised to find that running on WRF 3.4 the same domain, with
> | the same initial and boundary conditions could get different results.
> |
> |
> |
> | I’ve read about the fact that the internal variability of a model can
> | give different results, for the same period of simulation, when the
> | initial conditions change even just for a few days/hours.
> |
> | However, running 2 times the same and finding differences till +/-
> | 8m/s in U10 for example is scaring. Anyone can explain me how this is
> | possible?
> |
> |
> |
> |
> |
> |
> |
> | A Million Thanks in advance!
> |
> |
> |
> | Elena
> |
> |
> |
> |
> |
> |
> |
> |
> |
> | Elena Pison San Pedro
> |
> | M.Sc. in Atmospheric Sciences
> |
> |
> | Meteorologist/Climate Change Researcher
> |
> |
> |
> |
> |
> | Description:
> | C:\Users\mmc\AppData\Roaming\Microsoft\Signatures\dhi_logo.gif
> |
> |
> |
> |
> |
> | DHI-NTU Research Centre and Education Hub,
> |
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> |
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> | Tel:
> |
> |
> |
> | +65-6777-6330
> |
> |
> |
> |
> |
> | emp at dhi.com.sg
> |
> |
> | www.dhigroup.com
> |
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> |
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> |
> |
> |
> | _______________________________________________
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> | Wrf-users at ucar.edu
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>
> --
> --------------------------------------------------------------------
> Brian F. Jewett, Ph.D
> Research Scientist, University of Illinois
> Department of Atmospheric Sciences
> Email:  bjewett at uiuc.edu
> h:  (217) 333-3957 (W), 244-4393 (fax)
> --------------------------------------------------------------------
>
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