CLM (wrf-version) structure question

[edennis@umd_edu]

Hello,

I'm looking at the components of latent heat flux using CLM coupled to WRF for regional simulations. The land surface model produces three variables that (I assume) represent the components of latent heat flux: LHSOI, LHVEG, and LHTRAN, for bare soil evaporation, evaporation from the canopy surface, and transpiration, respectively. Though these variables have a strange dimensional structure. The dimensions are: ['subgrid_stag','north_south','east_west']. This 'subgrid_stag' dimension is non-intuitive. It has the same number (10 levels) as the number of soil layers, but only the top 3 layers are populated. When I compare the values of the LH components, to the total LH they do not match. I've asked the WRF community, and they are not familiar with this dimension, and it only occurs in variables produced by the CLM land surface model. Can anyone confirm/deny that these variables represent what I think they represent? Does anyone know what that dimension represents?

Any advice is welcome.

 

[sacks]

I assume you are referring to the relatively old version of CLM that comes bundled with the WRF code? I'm afraid that we won't be able to help with that here.

However, in the next few weeks, we plan to release a coupling between WRF and the latest version of CTSM / CLM5. We will encourage people to switch to using this rather than the old version of CLM that is embedded in WRF.

 

[edennis@umd_edu]

Thanks for your response!

 

[sacks]

Finalizing the WRF-CTSM coupling took longer than anticipated, but it is now ready, in a beta release. Let me know if you'd like me to forward you the release email.

 

[edennis@umd_edu]

Hi Bill, Thanks for the update! Yes, please send me the e-mail: edennis@umd.edu.

I appreciate the follow-up.