[Wrf-users] problem in real.exe when changing land cover categories

[Frank Colby]

Hi Nafiseh,

Yes.  Don't bother changing the land use in geo_em.  After you run 
geogrid, ungrib, and metgrid, and then run real.exe, you can change the 
land cover in wrfinput_d01.  Then when you run wrf.exe, the new land 
cover will be used.

Frank

On 8/7/2018 1:48 PM, Haghtalab, Nafiseh wrote:
>
> Thanks for the help.
>
> You mean after I run real.exe with original land cover, then I need to 
> change the land cover information in the wrfinput_d01 file or still I 
> need to change the land cover in geo_em? and run wrf.exe?
>
>
> -Nafiseh
>
> ------------------------------------------------------------------------
> *From:* Wrf-users <wrf-users-bounces at ucar.edu> on behalf of Helen 
> Macintyre <Helen.Macintyre at phe.gov.uk>
> *Sent:* Tuesday, August 7, 2018 12:15:13 PM
> *To:* Frank Colby; wrf-users at ucar.edu
> *Subject:* Re: [Wrf-users] problem in real.exe when changing land 
> cover categories
>
> Hi,
>
> You have to be careful changing land use as there are several arrays 
> that have this info.
>
> A far as I am aware (and someone please correct me if this is wrong) 
> LU_INDEX (i.e. dominant land cover) is created from the LANDUSEF (i.e. 
> land use fractions) array. This step is redone when you run real.exe, 
> so as Frank says it’s best to do this once you have your met_em files.
>
> Best,
>
> Helen
>
> *From:*Wrf-users [mailto:wrf-users-bounces at ucar.edu] *On Behalf Of 
> *Frank Colby
> *Sent:* 07 August 2018 17:07
> *To:* wrf-users at ucar.edu
> *Subject:* Re: [Wrf-users] problem in real.exe when changing land 
> cover categories
>
> Hi Nafiseh,
>
> When I did this kind of change, I found it had to be done after 
> running real.exe, in the wrf initialization files.  If you change it 
> in the geo files, real changes it back.
>
> Frank Colby
> UMass Lowell
>
> On 8/7/2018 11:31 AM, Haghtalab, Nafiseh wrote:
>
> Dear wrf users,
>
> I am trying to look at the sensitivity of climate to land cover 
> change. So, I tried to change my original land cover: replace the 
> savanna with cropland in Geo_emd01...
>
> then I ran the simulation , but when I check the wrfinput and the 
> wrfout, I see the original land cover.
>
> What else do I need to change?
>
> any help would be appreciated.
>
> -Nafiseh
>
> ------------------------------------------
>
> Nafiseh Haghtalab
>
> PhD Candidate,
>
> Department of Geography, Environment, and Spatial Science,
>
> Michigan State University.
>
>
>
>
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