CNDV in CLM4

[zhangguangzhi]

I would like to simulate dynamic changes in vegetation based on climate variability, rather than following the specifications in the "flanduse_timeseries" file.
When using CLM5, it seems that I can only achieve this by enabling the FATES module, but it significantly increases the computation time. Therefore, I am considering using the CNDV module from CLM4. Could experts please confirm if my understanding is correct?

 

[slevis]

That sounds correct.

 

[zhangguangzhi]

That sounds correct.

Thus, I enabled CNDV for clm4.5. However, during the build process, an error appears indicating that 'flanduse_timeseries' is not set. (err=ERROR : CLM build-namelist::CLMBuildNamelist::add_default() : No default value found for flanduse_timeseries. Are defaults provided for this resolution and land mask?).

Q1: If I provide the 'flanduse_timeseries' file at this point, will the simulated vegetation changes still be based on climate data?

However, when I set the 'flanduse_timeseries' file, an error occurs: err=ERROR : CLM build-namelist::CLMBuildNamelist::setup_logic_surface_dataset() : dynamic PFT's (setting flanduse_timeseries) are incompatible with dynamic vegetation (use_cndv=.true).

Q2: The solution I am considering is to use compset 1850_DATM%GSWP3v1_CLM45%CNDV_SICE_SOCN_RTM_SGLC_SWAV. However, the forcing varies. This way, I wouldn't need the 'flanduse_timeseries' file, and I could obtain vegetation distribution changing with climate. Is this setup correct?

 

[slevis]

I like your proposed solution. I think you should try it.

This thread continues now here:

dynamic PFT's (setting flanduse_timeseries) are incompatible with dynamic vegetation (use_cndv=.true)

I would like to simulate dynamic changes in vegetation based on climate variability, rather than following the specifications in the "flanduse_timeseries" file. When using CLM5, it seems that I can only achieve this by enabling the FATES module, but it significantly increases the computation...

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