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Dear Raju<br>
<div class="moz-forward-container"> <br>
I have posted the same question in September 2016 and got the
following answer from Nikhil Garg:<br>
<br>
in order to get the roughness, you need to output a variable ZNT,
usually this is not added to history file like wrfout, for that
purpose,
<div>you will have to modify ZNT in the registry. check
Registry.EM_COMMON, there is a line</div>
<div>ZNT ij misc 1 - i3rh
"ZNT" "TIME-VARYING ROUGHNESS LENGTH"
"m" <br>
</div>
<div>if your registry doesnt have 'h' in the 'i3rh', then just add
'h', and clean -a, compile and you will have the variable in
your history file.</div>
<br>
The above solution was successfully implemented by IT at our
offices.<br>
<br>
Kind regards, Gerard<br>
<br>
<br>
<div class="moz-cite-prefix">On 2017-01-08 08:21, rajuattada
wrote:<br>
</div>
<blockquote
cite="mid:20170108072121.20431.qmail@f4mail-235-216.rediffmail.com"
type="cite">Dear WRF users,<br>
Can anyone suggest me, how to retrieve <strong>surface
roughness/roughness length variable</strong> from WRF output ?<br>
Many thanks in advance.<br>
<br>
<br>
Regards<br>
Raju<br>
<br>
<br>
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