[Wrf-users] RADT and nesting in WRF ARW

[Ravan Ahmadov]

Dear Eric,

As I know it's better to use the same number for all domains.

Cheers,
Ravan.




Eric Altshuler wrote:
> Hello,
>
> When running a nested simulation in WRF ARW, is it better to use one value of RADT (number of minutes between radiation calls) for all domains, or should each domain have its own value of RADT according to its horizontal resolution? For example, if I have the following domain configuration:
>
> Domain 1 (coarse mesh) 36km
> Domain 2 (parent is domain 1) 12km
> Domain 3 (parent is domain 2) 4km
>
> should the RADT setting in namelist.input be:
>
> RADT = 36, 36, 36
>
> or should it be:
>
> RADT = 36, 12, 4
>
> The various WRF docs give conflicting information on what the proper setting of RADT is in the case of nested simulations.
>
> Any comments would be appreciated.
>
> Best regards,
>
> Eric L. Altshuler
> Assistant Research Scientist
> Center for Ocean-Land-Atmosphere Studies
> 4041 Powder Mill Road, Suite 302
> Calverton, MD 20705-3106
> USA
>
> E-mail: ela at cola.iges.org
> Phone: (301) 902-1257
> Fax: (301) 595-9793
>
> _______________________________________________
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>
>
>   


-- 
Yours sincerely,
Dr. Ravan Ahmadov

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