Multiple outer loops and tuning of var and len scale factors

Issues with running 3DVAR.

Multiple outer loops and tuning of var and len scale factors

Postby delfida2003 » Fri Jun 18, 2010 9:33 am

Hi all,
I'm working with GTS and RADAR data assimilation:
do anybody know something about "multiple outer loops technique" and subsequent tuning of variance and length scale factors in the wrfda namelist?
It is necessary modified the WRF 3D-Var source code to allow the use of different background scaling factors during each outer loop, or it is sufficient to set the appropriate variables in the namelist (max_ext_its, var_scaling1-5, len_scaling1-5) ?

Thank you in advance

Ida
delfida2003
 
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