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Can WRF-CLM model carbon flux?

CarterEWatson

New member
Hello WRF community!

I've got a seemingly straightforward question: does the preloaded version of CLM4 (sf_surface_physics = 5) allow for the simulation of biogeochemistry, or at least NEE, GPP, NPP, etc.? I have recently tried going through the motions to couple WRF with CTSM, following this guide. Despite the project being mostly abandoned by CTSM staff, I was able to get fairly far in the process, but after working for >3 months to get this set up, I hit an error that was never addressed, and I believe it is time to give up.

This said, for my master's research, I am trying to simulate how a large clearcut alters mesoscale atmospheric fluxes and convective cloud development, and how this could impact how neighboring vegetation communities process and cycle carbon. Given that I am in an Ecology program, this last piece is key to my research, so I need a dynamic land surface model that is coupled with WRF to simulate carbon fluxes. While the revamped Noah-MP appears to be a reasonable option for this line of inquiry, I am concerned about the efficacy of the carbon simulations, particularly in comparison to those found in the CLM models. CLM puts greater emphasis on whole-plant phylogeny and physiology, which is far preferred by plant and ecosystem ecologists.

So, getting back to my question: is CLM4 a viable candidate for this type of research? If so, are there namelist parameters associated with the model that would allow for the simulation of complex biogeochemistry? I would greatly appreciate the guidance from you all. :)

Best regards,
Carter
 
Carter,
I am not an expert on CLM, and sorry that I don't have an immediate answer to your question.
Dr. Jiming Jin from Utah State University coupled CLM with WRF years ago. Probably you can contact him to get more information.
 
Hi Carter,

in WRF many features of CLM are deactivated. For this Paper I activated the photosynthesis in CLM and I implemented another equation for respiration, but it is an idealized study. To implement this for real case applications needs parameter tuning and verification first.


Regards,
Matthias.
 
Matthias,
I am sorry that we don't have expertise on biogeochemical simulation. CLM is incorporated into WRF as a land model, which basically only handles soil physics and land-atmosphere flux exchanges. Its capabilities on biophysical/biogeochemical simulations are mostly turned off.
You may know that WRF has been frozen for further development. Most of our efforts have been transferred to MPAS. Therefore, it is no longer our priority to develop new features in WRF.
Hope some people in the community may provide more information regarding your issue. I would appreciate if you can post your progress in the Forum so that other users may benefit from your input. Thanks in advance.
 
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