Migrate fates parameter file switches to HLM namelist

[glemieux]

In an effort to avoid having to modify the fates parameter file when attempting to run with different fates modes, we should move parameter "switches" into the host land model namelist. The list of parameter file switches as of API37 appears to be:

fates_daylength_factor_switch
fates_hydro_solver
fates_leaf_photo_tempsens_model
fates_leaf_stomatal_assim_model
fates_leaf_stomatal_model
fates_maintresp_leaf_model
fates_mort_cstarvation_model
fates_rad_model
fates_regeneration_model

Given that the fates_hydro_htftype_node switch is at the organ level, this is probably best left at the parameter file level currently.

[glemieux]

@bishtgautam do you have any concerns with us pursuing this with elm-fates?

[bishtgautam]

@glemieux , Pursuing changes like ESCOMP/CTSM#2904 within ELM is fine.

Btw, why not change the following

        if(use_fates_photosynth_acclimation) then
           pass_photosynth_acclimation_switch = 1
        else
           pass_photosynth_acclimation_switch = 0
        end if
        call set_fates_ctrlparms('use_photosynth_acclimation',ival=pass_photosynth_acclimation_switch)

        if(use_fates_daylength_factor) then
           pass_daylength_factor_switch = 1
        else
           pass_daylength_factor_switch = 0
        end if
        call set_fates_ctrlparms('use_daylength_factor_switch',ival=pass_daylength_factor_switch)
       ...
        if (trim(fates_hydro_solver) == '1D_Taylor') then
           pass_hydro_solver = 1
        else if (trim(fates_hydro_solver) == '2D_Picard') then
           pass_hydro_solver = 2
        else if (trim(fates_hydro_solver) == '2D_Taylor') then
           pass_hydro_solver = 3
        end if
        call set_fates_ctrlparms('hydr_solver',ival=pass_hydro_solver)

to

        call set_fates_ctrlparms('use_photosynth_acclimation',pass_photosynth_acclimation_switch)
        call set_fates_ctrlparms('use_daylength_factor_switch',use_fates_daylength_factor)
        call set_fates_ctrlparms('hydr_solver',fates_hydro_solver)

This way, if you in the future you stop supporting 2D_Picard, you don't have to make changes in the host driver and FATES.

[glemieux]

Thanks @bishtgautam for the quick response. I'll generate an equivalent e3sm-side PR in the next day or so.