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Update CLMBuildNamelist to allow AD spinup with FATES (not SP) #3962

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Update CLMBuildNamelist to allow AD spinup with FATES (not SP) #3962

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77429f4
build namelist update
adrifoster Apr 24, 2026
cd1471a
Merge branch 'master' into buildnamelist_update
adrifoster Apr 24, 2026
1af0a00
don't turn on reseed_dead_plants if using FATES
adrifoster Apr 24, 2026
ca723c8
add comment for reseed dead plants
May 20, 2026
0be4e80
Merge branch 'master' into buildnamelist_update
adrifoster Jul 23, 2026
4b1a933
update variable names and hist_ndens
adrifoster Jul 23, 2026
6789133
Merge branch 'b4b-dev' into buildnamelist_update
slevis-lmwg Jul 23, 2026
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13 changes: 10 additions & 3 deletions bld/CLMBuildNamelist.pm
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Original file line number Diff line number Diff line change
Expand Up @@ -1245,7 +1245,14 @@ sub setup_cmdl_spinup {
}
}
$log->verbose_message("CLM accelerated spinup mode is $val");
if ( &value_is_true($nl_flags->{'use_cn'}) ) {

# is this a BGC-capable mode that supports spinup?
# spinup is valid if using CN, or using FATES in non-SP mode.
my $use_fates_spinup_ok = &value_is_true($nl_flags->{'use_fates'}) &&
! &value_is_true($nl_flags->{'use_fates_sp'});
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my $bgc_spinup_capable = &value_is_true($nl_flags->{'use_cn'}) || $use_fates_spinup_ok;

if ( $bgc_spinup_capable ) {
add_default($opts, $nl_flags->{'inputdata_rootdir'}, $definition,
$defaults, $nl, "spinup_state", clm_accelerated_spinup=>$nl_flags->{'clm_accelerated_spinup'},
use_cn=>$nl_flags->{'use_cn'}, use_fates=>$nl_flags->{'use_fates'},
Expand All @@ -1262,8 +1269,8 @@ sub setup_cmdl_spinup {
} else {
$nl_flags->{'bgc_spinup'} = "off";
}
# For AD spinup mode by default reseed dead plants
if ( $nl_flags->{$var} ne "off" ) {
# For BGC and AD spinup mode by default reseed dead plants
if ( $nl_flags->{$var} ne "off" && &value_is_true($nl_flags->{'use_cn'}) ) {
add_default($opts, $nl_flags->{'inputdata_rootdir'}, $definition,
$defaults, $nl, "reseed_dead_plants", clm_accelerated_spinup=>$nl_flags->{$var},
use_cn=>$nl_flags->{'use_cn'} );
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4 changes: 2 additions & 2 deletions bld/namelist_files/namelist_defaults_ctsm.xml
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Expand Up @@ -74,15 +74,15 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
<hist_fincl1 clm_accelerated_spinup="on" use_cn=".true."
>'TOTECOSYSC','TOTECOSYSN','TOTSOMC','TOTSOMN','TOTVEGC','TOTVEGN','TLAI','GPP','CPOOL','NPP','TWS','H2OSNO'</hist_fincl1>
<hist_fincl1 clm_accelerated_spinup="on" use_fates=".true."
>'TOTSOMC','TOTSOMN','TLAI','GPP','NPP','TWS','H2OSNO'</hist_fincl1>
>'TOTSOMC','TOTSOMN','FATES_LAI','FATES_GPP','FATES_NPP','FATES_VEGC','TWS','H2OSNO'</hist_fincl1>
<hist_fincl1 clm_accelerated_spinup="on" use_cn=".false."
>'TLAI','TWS','H2OSNO'</hist_fincl1>
<hist_fincl1 clm_accelerated_spinup="sasu" use_cn=".true." use_cndv=".true."
>'TOTECOSYSC','TOTECOSYSN','TOTSOMC','TOTSOMN','TOTVEGC','TOTVEGN','TLAI','GPP','NPP','TWS','TSAI','HTOP','HBOT','H2OSNO'</hist_fincl1>
<hist_fincl1 clm_accelerated_spinup="sasu" use_cn=".true."
>'TOTECOSYSC','TOTECOSYSN','TOTSOMC','TOTSOMN','TOTVEGC','TOTVEGN','TLAI','GPP','CPOOL','NPP','TWS','H2OSNO'</hist_fincl1>
<hist_fincl1 clm_accelerated_spinup="sasu" use_fates=".true."
>'TOTSOMC','TOTSOMN','TLAI','GPP','NPP','TWS','H2OSNO'</hist_fincl1>
>'TOTSOMC','TOTSOMN','FATES_LAI','FATES_GPP','FATES_NPP','FATES_VEGC','TWS','H2OSNO'</hist_fincl1>
<hist_nhtfrq clm_accelerated_spinup="on" >-8760</hist_nhtfrq>
<hist_nhtfrq clm_accelerated_spinup="sasu">-8760</hist_nhtfrq>
<hist_mfilt clm_accelerated_spinup="on" >20</hist_mfilt>
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2 changes: 1 addition & 1 deletion cime_config/usermods_dirs/clm/fates_sp/user_nl_clm
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Expand Up @@ -6,4 +6,4 @@ use_lch4 = .false.
fates_spitfire_mode = 0
use_fates_fixed_biogeog = .true.
use_fates_nocomp = .true.
hist_ndens = 1
hist_ndens = 2
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