[Wrf-users] same run - different results?

[Brian Jewett]

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?
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| Sent from my phone.
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| -----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?
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| Hi,
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| 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.
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| 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?
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| A Million Thanks in advance!
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| Elena
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| Elena Pison San Pedro
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| M.Sc. in Atmospheric Sciences
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| Meteorologist/Climate Change Researcher
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| Description:
| C:\Users\mmc\AppData\Roaming\Microsoft\Signatures\dhi_logo.gif
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| DHI-NTU Research Centre and Education Hub,
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| DHI Water & Environment (S) Pte Ltd
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| 1 Clean Tech Loop
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| #03-05 CleanTech One
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| Singapore 637141
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| Tel:
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| +65-6777-6330
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| emp at dhi.com.sg
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| www.dhigroup.com
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-- 
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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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