Does CLM5 compatible with FMOZ compset in CESM2.1.3?

[Hemraj]

Hi,
FMOZ by default is taking CAM4 and CLM4.5 (CESM2.2.0 Component Sets Definitions). I tried to change CLM4.5 to CLM5 using the code (./xmlchange CLM_CONFIG_OPTS="-phys clm5_0") in my case script, but it ended with some error message (ERROR : CLM build-namelist::CLMBuildNamelist::setup_logic_lnd_tuning() : First part of lnd_tuning_mode MUST match the CLM version you are using.).

I retried changing clm5_0 to clm4_5, keeping every other thing the same and the case script run well. Does it mean, CLM5 is not compatible with the FMOZ compset in CESM2.1.3?

I tried this in both BGC and SP mode, the error is same in both cases.

Thank you.

Best,
Hemraj

 

[Hemraj]

Let me make it easier to understand, FMOZ compset by default is "2000_CAM40%TMOZ_CLM45%SP_CICE%PRES_DOCN%DOM_RTM_SGLC_SWAV", can I change CLM45 to CLM50 like "2000_CAM40%TMOZ_CLM50%SP_CICE%PRES_DOCN%DOM_RTM_SGLC_SWAV". If yes, how? Simply changing the number doesn't work.
Thank you!!

 

[oleson]

The error you are getting in the first instance is due the fact that the case is setup out of the box with LND_TUNING_MODE=clm4_5_cam6.0 and you've changed the physics to -phys clm5_0, and so it is complaining that clm4_5 doesn't match clm5_0.
You should however be able to change CLM45 to CLM50 in the compset name in a new case.
I tried this with cesm2.1.3 and both cases (w/CLM45 and w/CLM50) ran fine. The LND_TUNING_MODE gets set properly if you do it that way.

 

[Hemraj]

Thank you @oleson. Yes, I can change that way as you mentioned.

One concern I have here is, although in the compset we specify CAM40 and CLM50, if we check "env_run.xml" we can still see CAM6 is being used ( <entry id="LND_TUNING_MODE" value="clm5_0_cam6.0">). I am a bit confused, whether our simulation is taking CAM4 or CAM6? This is because our compset is set to be CAM4 but LND_TUNING_MODE has CAM6.
Many thanks!

 

[oleson]

The case will be using cam4 as the atmospheric model. The cam6 in the LND_TUNING_MODE refers to a couple of land fire parameters that depend on whether clm4_5 or clm5 is used. They have been tuned for use with cam6. There is no LND_TUNING_MODE for cam4 (or cam5).
The FMOZ compset is listed as "defined", not scientifically supported. So you would need to verify yourself that the case is giving reasonable answers.