Hello Agnes,<div><br></div><div>This question was asked before, maybe you can find out in the archive. You are supposed to use 27 km for all domains.</div><div><br></div><div>Regards,</div><div>Abdullah KAHRAMAN<br>M.Sc. Meteorological Engineer<br>
Turkish State Meteorological Service<br>Ph.D. Student<br>Istanbul Technical University, Atmospheric Sciences Program<br>
<br><br><div class="gmail_quote">On Fri, Apr 9, 2010 at 11:22, Agnes Mika <span dir="ltr"><<a href="mailto:agnes.mika@bmtargoss.com">agnes.mika@bmtargoss.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Dear WRF help and WRF users,<br>
<br>
I am confused about what value I should use for the radiation<br>
timestep. The recommendation in the manual is 1 minute per km of dx<br>
and to use the same value for all nests.<br>
<br>
Should I use the radt valid for the coarsest or the finest nest for<br>
all nests?<br>
<br>
E.g., I am using nests with 27, 9, and 3 km resolution. Should radt<br>
be set to 27 for all nests or to 3?<br>
<br>
Thank you in advance,<br>
Agnes<br>
<br>
--<br>
Dr. A'gnes Mika<br>
Advisor, Meteorology and Air Quality<br>
<br>
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