[Wrf-users] Help in retrieving "surface roughness" parameter from WRF output

[G. Hesselmans]

Dear Raju

I have posted the same question in September 2016 and got the following 
answer from Nikhil Garg:

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,
you will have to modify ZNT in the registry. check Registry.EM_COMMON, 
there is a line
ZNT              ij      misc        1         -      i3rh    "ZNT"     
               "TIME-VARYING ROUGHNESS LENGTH"          "m"
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.

The above solution was successfully implemented by IT at our offices.

Kind regards, Gerard


On 2017-01-08 08:21, rajuattada wrote:
> Dear WRF users,
> Can anyone suggest me, how to retrieve *surface roughness/roughness 
> length variable* from WRF output ?
> Many thanks in advance.
>
>
> Regards
> Raju
>
>
>
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> Wrf-users at ucar.edu
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Dr. G. (Gerard) Hesselmans
Director, Remote Sensing Expert

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