Only turn c13/c14 on by default for clm5_0 with BGC on and for CRUJRA2024 forcing and historical period

Author: ekluzek

bld/CLMBuildNamelist.pm

@@ -3754,7 +3754,7 @@ sub setup_logic_c_isotope {
       }
     }
     if ( &value_is_true($use_c14) ) {
-      add_default($opts, $nl_flags->{'inputdata_rootdir'}, $definition, $defaults, $nl, 'use_c14_bombspike', 'bgc_mode'=>$nl_flags->{'bgc_mode'}, 'phys'=>$nl_flags->{'phys'});
+      add_default($opts, $nl_flags->{'inputdata_rootdir'}, $definition, $defaults, $nl, 'use_c14_bombspike', 'use_c14'=>$use_c14 );
       my $use_c14_bombspike = $nl->get_value('use_c14_bombspike');
       if ( &value_is_true($use_c14_bombspike) ) {
          add_default($opts, $nl_flags->{'inputdata_rootdir'}, $definition, $defaults, $nl, 'atm_c14_filename',
@@ -3768,7 +3768,7 @@ sub setup_logic_c_isotope {
       }
     }
     if ( &value_is_true($use_c13) ) {
-      add_default($opts, $nl_flags->{'inputdata_rootdir'}, $definition, $defaults, $nl, 'use_c13_timeseries', 'bgc_mode'=>$nl_flags->{'bgc_mode'}, 'phys'=>$nl_flags->{'phys'});
+      add_default($opts, $nl_flags->{'inputdata_rootdir'}, $definition, $defaults, $nl, 'use_c13_timeseries', 'use_c13'=>$use_c13 );
       my $use_c13_timeseries = $nl->get_value('use_c13_timeseries');
       if ( &value_is_true($use_c13_timeseries) ) {
          add_default($opts, $nl_flags->{'inputdata_rootdir'}, $definition, $defaults, $nl, 'atm_c13_filename',

bld/namelist_files/namelist_defaults_ctsm.xml

@@ -115,11 +115,15 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 <use_c14>.false.</use_c14>
 <use_c13_timeseries>.false.</use_c13_timeseries>
 <use_c14_bombspike>.false.</use_c14_bombspike>
-
-<use_c13 phys="clm6_0" bgc_mode="bgc" >.true.</use_c13>
-<use_c14 phys="clm6_0" bgc_mode="bgc" >.true.</use_c14>
-<use_c13_timeseries phys="clm6_0" bgc_mode="bgc" >.true.</use_c13_timeseries>
-<use_c14_bombspike phys="clm6_0" bgc_mode="bgc" >.true.</use_c14_bombspike>
+<!-- Turn timeseries on if Carbon isotopes are on -->
+<use_c13_timeseries use_c13=".true.">.true.</use_c13_timeseries>
+<use_c14_bombspike use_c14=".true.">.true.</use_c14_bombspike>
+
+<!-- Turn Carbon isotopes on for clm6_0 physics with BGC on with CRUJRA or CAM7 forcing and for historical period-->
+<use_c13 phys="clm6_0" bgc_mode="bgc" lnd_tuning_mode="clm6_0_CRUJRA2024" ssp_rcp="hist">.true.</use_c13>
+<use_c14 phys="clm6_0" bgc_mode="bgc" lnd_tuning_mode="clm6_0_CRUJRA2024" ssp_rcp="hist">.true.</use_c14>
+<use_c13 phys="clm6_0" bgc_mode="bgc" lnd_tuning_mode="clm6_0_cam7.0" ssp_rcp="hist">.true.</use_c13>
+<use_c14 phys="clm6_0" bgc_mode="bgc" lnd_tuning_mode="clm6_0_cam7.0" ssp_rcp="hist">.true.</use_c14>
 
 <!-- Carbon isotope concentration files -->
 <atm_c13_filename use_c13=".true." use_c13_timeseries=".true." ssp_rcp="hist"     >lnd/clm2/isotopes/atm_delta_C13_CMIP6_1850-2015_yearly_v2.0_c190528.nc</atm_c13_filename>