How to extract land points only from wrfout files

[katierobinson]

Hi,

I am running a 10-year WRF simulation over a domain that includes both land and ocean. For my analysis I want to consider only the land points (for example, when extracting the variable T2 I want to only extract T2 points over land).

Is there a way to extract land points only from the wrfout and wrfxtrm files? I am familiar with cdo but haven't been able to find the right operation to do this. Any suggestions would be appreciated! I am fairly new to using WRF

Thanks.

 

[Ming Chen]

The variable "landsea" is included i wrfout. This variable indicates whether the model point is land(=1) or water(=0). You can use this variable to mask out water point.

 

[katierobinson]

Hi Ming,

I am trying to use the variable landsea to mask out water points but I am not sure how to do so such that the water points for all other variables (such as T2) is masked out as well. Any tips?

Thanks.

 

[katierobinson]

Hi,

Nevermind! I figured out how to do it using the command cdo selvar,LANDMASK

Thanks.

 

[Ming Chen]

Would you please post the command you use, just in case someone else may want to do the same/similar ? Thanks in advance.

 

[katierobinson]

Yes of course,

the commands I used are:

cdo selvar,LANDMASK wrfout.nc landmask.nc
cdo ifthen landmask.nc wrfout.nc wrfout_no_ocean.nc

this should produce a file of wrf output that only includes the land points!

Thanks.