[Wrf-users] Radiation timestep - what to use?

Agnes Mika agnes.mika at bmtargoss.com
Fri Apr 9 02:22:27 MDT 2010

Dear WRF help and WRF users,

 I am confused about what value I should use for the radiation
 timestep. The recommendation in the manual is 1 minute per km of dx
 and to use the same value for all nests.

 Should I use the radt valid for the coarsest or the finest nest for
 all nests?

 E.g., I am using nests with 27, 9, and 3 km resolution. Should radt
 be set to 27 for all nests or to 3?

Thank you in advance,

Dr. A'gnes Mika
Advisor, Meteorology and Air Quality

Tel:    +31 (0)527-242299
Fax:    +31 (0)527-242016
Web:    www.bmtargoss.com

P.O. Box 61, 8325 ZH Vollenhove
Voorsterweg 28, 8316 PT Marknesse
The Netherlands

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