[RegCNET] RegCM Ensemble run

[James Ciarlo`]

That is actually very helpful. Thanks :)


On 3 May 2013 16:16, Travis O'Brien <travis.obrien at gmail.com> wrote:

> Hi James,
>
> The ensemble_run flag is one of the parameters that activates the
> ensembling system. This is a relatively new feature that is described in
> the latest version of the RegCM UserGuide<http://gforge.ictp.it/gf/download/docmanfileversion/54/973/UserGuide.pdf>,
> Section 6.1.7.
>
> When the ensembling system is activated, one or more of the boundary
> condition fields are perturbed by a small fraction each time they are read
> in.  For example, the following settings would use the ensembling strategy
> of O'Brien et al. (2011) <http://dx.doi.org/10.1007/s00382-010-0900-5>,
> which is the main reference that describes the details of the ensembling
> method:
>
> &globdatparam
>
> ensemble_run = .true.
>
> /
>
> &perturbparam
>
> lperturb_q = .true.
>
> perturb_frac_q = 0.001d0
>
> /
>
>
> With these settings turned on, each time you run regcm, the output will be
> slightly different.  So to create an ensemble of simulations, you might run
> RegCM five times, and each time change the parameter dirout to output.1,
> output.2, output.3, output.4, output.5, etc.
>
> I hope this helps, and please let me know if I can clarify anything.
>
> Kind Regards,
> -Travis-
>
> --
> Travis O'Brien
> Lawrence Berkeley National Lab
> http://esd.lbl.gov/about/staff/travisobrien/<http://esd.lbl.gov/about/staff/travisobrien/index.html>
> (510) 495-8047
>
>
>
>
>
>
> On Fri, May 3, 2013 at 2:51 AM, James Ciarlo` <james.ciarlo at physics.org>wrote:
>
>> Dear RegCNET,
>>
>> I am interested in running an ensemble expleriment with RegCM4. My
>> intention was to choose different settings for the different simulations.
>>
>> I have noticed the setting: ensemble_run = .false.,  in the
>> globdatparam. This obviously needs to be set to true, but since I have
>> never done an ensemble run before with RegCM4 I was wondering if there was
>> anything I needed to know.
>>
>> Regards,
>> James
>>
>> _______________________________________________
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>> RegCNET at lists.ictp.it
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>>
>
>
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