diff --git a/bld/CLMBuildNamelist.pm b/bld/CLMBuildNamelist.pm
index 72a14e1550..ddba1dd4a5 100755
--- a/bld/CLMBuildNamelist.pm
+++ b/bld/CLMBuildNamelist.pm
@@ -810,7 +810,7 @@ sub setup_cmdl_fates_mode {
                       "fates_parteh_mode","use_fates_tree_damage","fates_seeddisp_cadence","use_fates_luh","fluh_timeseries",
                       "flandusepftdat","use_fates_potentialveg","use_fates_lupft","fates_history_dimlevel",
                       "use_fates_daylength_factor", "use_fates_photosynth_acclimation","fates_stomatal_assimilation",
-                      "fates_cstarvation_model", "fates_regeneration_model", "fates_hydro_solver"
+                      "fates_cstarvation_model", "fates_regeneration_model", "fates_hydro_solver", "fates_radiation_model"
                     );
 
        # dis-allow fates specific namelist items with non-fates runs
@@ -4707,7 +4707,7 @@ sub setup_logic_fates {
                        "use_fates_inventory_init","fates_seeddisp_cadence","fates_history_dimlevel",
                        "fates_harvest_mode","fates_parteh_mode", "use_fates_cohort_age_tracking","use_fates_tree_damage",
                        "use_fates_daylength_factor", "use_fates_photosynth_acclimation","fates_stomatal_assimilation",
-                       "fates_cstarvation_model", "fates_regeneration_model", "fates_hydro_solver"
+                       "fates_cstarvation_model", "fates_regeneration_model", "fates_hydro_solver", "fates_radiation_model"
                     );
 
         foreach my $var ( @list ) {
diff --git a/bld/namelist_files/namelist_defaults_ctsm.xml b/bld/namelist_files/namelist_defaults_ctsm.xml
index ede704b407..4c3378d538 100644
--- a/bld/namelist_files/namelist_defaults_ctsm.xml
+++ b/bld/namelist_files/namelist_defaults_ctsm.xml
@@ -2392,6 +2392,7 @@ lnd/clm2/surfdata_esmf/NEON/ctsm5.3.0/surfdata_1x1_NEON_TOOL_hist_2000_78pfts_c2
 <fates_stomatal_assimilation   use_fates=".true.">net</fates_stomatal_assimilation>
 <fates_cstarvation_model       use_fates=".true.">linear</fates_cstarvation_model>
 <fates_regeneration_model      use_fates=".true.">default</fates_regeneration_model>
+<fates_radiation_model         use_fates=".true.">norman</fates_radiation_model>
 <fates_hydro_solver            use_fates=".true.">1D_Taylor</fates_hydro_solver>
 <use_fates_planthydro          use_fates=".true.">.false.</use_fates_planthydro>
 <use_fates_tree_damage         use_fates=".true.">.false.</use_fates_tree_damage>
diff --git a/bld/namelist_files/namelist_definition_ctsm.xml b/bld/namelist_files/namelist_definition_ctsm.xml
index ecf4886d60..58c030192b 100644
--- a/bld/namelist_files/namelist_definition_ctsm.xml
+++ b/bld/namelist_files/namelist_definition_ctsm.xml
@@ -775,6 +775,11 @@ Allowed values are:
 This option is older than the luhdata options and may be depricated at some point in the future.
 </entry>
 
+<entry id="fates_radiation_model" type="char*256" category="physics"
+        group="clm_inparm" valid_values="norman, twostream" value="norman">
+Set the FATES radiation model
+</entry>
+
 <entry id="fates_hydro_solver" type="char*256" category="physics"
         group="clm_inparm" valid_values="1D_Taylor, 2D_Picard, 2D_Newton" value="1D_Taylor">
 Set the FATES hydro solver method
diff --git a/src/main/clm_varctl.F90 b/src/main/clm_varctl.F90
index 5aac624c04..319fe89ab9 100644
--- a/src/main/clm_varctl.F90
+++ b/src/main/clm_varctl.F90
@@ -334,6 +334,7 @@ module clm_varctl
   character(len=256), public :: fates_stomatal_assimilation = ''        ! net or gross assimilation modes
   character(len=256), public :: fates_cstarvation_model = ''            ! linear or exponential function
   character(len=256), public :: fates_regeneration_model = ''           ! default, TRS, or TRS without seed dynamics
+  character(len=256), public :: fates_radiation_model = ''              ! Norman or two-stream radiation model
   character(len=256), public :: fates_hydro_solver = ''                 ! 1D Taylor, 2D Picard, 2D Newton
   logical, public            :: use_fates_planthydro = .false.          ! true => turn on fates hydro
   logical, public            :: use_fates_cohort_age_tracking = .false. ! true => turn on cohort age tracking
diff --git a/src/main/controlMod.F90 b/src/main/controlMod.F90
index 6cc34d632b..2f7580f2b6 100644
--- a/src/main/controlMod.F90
+++ b/src/main/controlMod.F90
@@ -245,6 +245,7 @@ subroutine control_init(dtime)
           fates_stomatal_assimilation,                  &
           fates_cstarvation_model,                      &
           fates_regeneration_model,                     &
+          fates_radiation_model,                        &
           fates_hydro_solver,                           &
           fates_parteh_mode,                            &
           fates_seeddisp_cadence,                       &
@@ -808,6 +809,7 @@ subroutine control_spmd()
     call mpi_bcast (fates_stomatal_assimilation, len(fates_stomatal_assimilation) , MPI_CHARACTER, 0, mpicom, ier)
     call mpi_bcast (fates_cstarvation_model, len(fates_cstarvation_model) , MPI_CHARACTER, 0, mpicom, ier)
     call mpi_bcast (fates_regeneration_model, len(fates_regeneration_model) , MPI_CHARACTER, 0, mpicom, ier)
+    call mpi_bcast (fates_radiation_model, len(fates_radiation_model) , MPI_CHARACTER, 0, mpicom, ier)
     call mpi_bcast (fates_hydro_solver, len(fates_hydro_solver) , MPI_CHARACTER, 0, mpicom, ier)
     call mpi_bcast (use_fates_planthydro, 1, MPI_LOGICAL, 0, mpicom, ier)
     call mpi_bcast (use_fates_tree_damage, 1, MPI_LOGICAL, 0, mpicom, ier)
@@ -1215,6 +1217,7 @@ subroutine control_print ()
        write(iulog, *) '    fates_stomatal_assimilation = ', fates_stomatal_assimilation
        write(iulog, *) '    fates_cstarvation_model = ', fates_cstarvation_model
        write(iulog, *) '    fates_regeneration_model = ', fates_regeneration_model
+       write(iulog, *) '    fates_radiation_model = ', fates_radiation_model
        write(iulog, *) '    fates_hydro_solver = ', fates_hydro_solver
        write(iulog, *) '    fates_paramfile = ', fates_paramfile
        write(iulog, *) '    fates_parteh_mode = ', fates_parteh_mode
diff --git a/src/utils/clmfates_interfaceMod.F90 b/src/utils/clmfates_interfaceMod.F90
index 03b9a6732d..f3805f796f 100644
--- a/src/utils/clmfates_interfaceMod.F90
+++ b/src/utils/clmfates_interfaceMod.F90
@@ -580,6 +580,13 @@ subroutine CLMFatesGlobals2()
         end if
         call set_fates_ctrlparms('hydr_solver',ival=pass_hydro_solver)
 
+        if (trim(fates_radiation_model) == 'norman') then
+           pass_radiation_model = 1
+        else if (trim(fates_hydro_solver) == 'twostream') then
+           pass_radiation_model = 2
+        end if
+        call set_fates_ctrlparms('radiation_model',ival=pass_radiation_model)
+
         ! FATES logging and harvest modes
         pass_logging = 0
         pass_lu_harvest = 0