&mod_levs in namelist.wps

[YKim]

Hi,

I want to set model levels only I need when making met_em files as below.

in namelist.wps file,
&mod_levs
press_pa = 100000, 92500, 85000, 70000, 60000, 50000, 40000, 30000, 25000, 20000,
15000, 10000, 7000, 5000
/

So I conducted settings with this namelist.wps file as follows.
1. set needed levels as mentioned above in namelist.wps file
2. ./util/mod_levs.exe FILE:$current_date NEW:$current_date
3. ./metgrid.exe with NEW:$current_date files

However, there are some problems. Soil levels disappear. The error message below is from real.exe.
namelist : num_metgrid_soil_levels = 4
input files : NUM_METGRID_SOIL_LEVELS = 0 (from met_em files).

So, how can I set soil levels in this case?
I conducted ungrib.exe with ERA5 reanalysis pressure level and single level data.

Thanks.

 

[kwerner]

Hi,
I believe when you list the levels you want to keep, you need to make sure to also keep the soil levels/layers. Notice how, in the WPS chapter of the WRF Users' Guide, the example shows levels like 201300 and 200100 - those are soil levels. You'll need to look at the intermediate files (you can use the WPS/util/rd_intermediate.exe program) to determine which levels your data use and make sure to list those in the &mod_levs section of the namelist.

 

[YKim]

Hi,
I believe when you list the levels you want to keep, you need to make sure to also keep the soil levels/layers. Notice how, in the WPS chapter of the WRF Users' Guide, the example shows levels like 201300 and 200100 - those are soil levels. You'll need to look at the intermediate files (you can use the WPS/util/rd_intermediate.exe program) to determine which levels your data use and make sure to list those in the &mod_levs section of the namelist.

Hi Kwerner,

Thank you for your reply.
I think the level "200100" works as soil level in my case. Also I checked at ./metgrid/METGRID.TBL.ARW .

Have a nice day
Thanks.