How to handle river and ocean in the regional offline simulations with CLM5?

[1074302572@qq_com]

Dear Community,
I had a problem when I intend to run the regional case within the CLM5. If the simualtion domain comprises the coastal regions or regions along the river, I was wondering that how to calculate the averaged fluxes on these grid cells. Did it call the Ocean module (POP) or the River module (MOSART)? Or were they just considered as the lake landunit to represent?
Thanks in advance for your help.

Best regards,
Congyuan

 

[slevis]

@1074302572@qq_com
I did a search using the "Search forums" button and entering the keywords "river regional" and found a thread relevant to your question:

ERROR: ROF_GRID is null MOSART_MODE not NULL

Dear scientists of NCAR I cut a regional surfcase dataset and domain dataset from the default 0.125x0.125 spatial resolution surfdata and domain dataset without changing the resolution by using the CLM5 tools. Using the regional surfdata and domain data, I tried to create a case to simulate...

bb.cgd.ucar.edu

The main point is that you are better off turning off the river model for regional simulations and that, if you do want active rivers, then you will have to do a lot of setup that we do not support.

 

[slevis]

One more thing:
When you run an "I" compset, then the ocean model is NOT called.

 

[1074302572@qq_com]

One more thing:
When you run an "I" compset, then the ocean model is NOT called.

Thanks a lot for your reply. As you pointing it out, I run an "I" compset within the CLM5. Yet I also want to konw how to calculate total fluxes (e.g., sensible heat flux) in a grid cell if it is composed of 50% vegetation and 50% river (or 50% ocean). The CLM5 estimates fluxes over different land units (i.e., the subgrid hierarchy) and then get a weighted average of each land unit as total flux values of this grid. So how to represent 50% river in the simulations?

 

[oleson]

There are no surface fluxes from non-land (e.g., rivers, ocean, etc.) fractions of the grid cell. The fluxes reported are for the land fraction of the gridcell. You can find the land fraction of each grid cell from the CLM history files (variable is landfrac).

 

[1074302572@qq_com]

Thank you very much for your reply!

Bests,

Congyuan