diff --git a/bld/namelist_files/namelist_defaults_ctsm.xml b/bld/namelist_files/namelist_defaults_ctsm.xml
index 34910ec900..d7dc104183 100644
--- a/bld/namelist_files/namelist_defaults_ctsm.xml
+++ b/bld/namelist_files/namelist_defaults_ctsm.xml
@@ -756,18 +756,11 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 <!--
      clm5_1 physics with CAM7.0 grids...
 -->
-<!-- These first five are for SP mode and CLM5.1 only -->
-<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm5_1_cam7.0"
-                  maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="0.9x1.25"            >.true.</use_init_interp>
-<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm5_1_cam7.0"
-                  maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="1.9x2.5"             >.true.</use_init_interp>
+<!-- These next two are for SP mode and CLM5.1 only -->
 <use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm5_1_cam7.0"
                   maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="ne0np4.ARCTIC.ne30x4"    >.true.</use_init_interp>
 <use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm5_1_cam7.0"
                   maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="ne0np4.ARCTICGRIS.ne30x8">.true.</use_init_interp>
-<!-- 2003 -->
-<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="2003" lnd_tuning_mode="clm5_1_cam7.0"
-                  maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="1.9x2.5"                 >.true.</use_init_interp>
 
 <!-- 2013 -->
 <use_init_interp  use_cndv=".false." use_fates=".false." sim_year="2013" lnd_tuning_mode="clm5_1_cam7.0"
@@ -776,18 +769,16 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 <!--
      clm6_0 physics with CAM7.0 grids...
 -->
-<!-- These first five are for SP mode and CLM6.0 only -->
-<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm6_0_cam7.0"
-                  maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="0.9x1.25"            >.true.</use_init_interp>
-<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm6_0_cam7.0"
-                  maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="1.9x2.5"             >.true.</use_init_interp>
+<!-- These are for 1979 for f09 and f19 for any atmospheric forcing -->
+<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" phys="clm6_0"
+                  hgrid="0.9x1.25"            >.true.</use_init_interp>
+<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" phys="clm6_0"
+                  hgrid="1.9x2.5"            >.true.</use_init_interp>
+<!-- These next two are for SP mode and CLM6.0 with CAM7.0 only -->
 <use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm6_0_cam7.0"
                   maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="ne0np4.ARCTIC.ne30x4"    >.true.</use_init_interp>
 <use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm6_0_cam7.0"
                   maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="ne0np4.ARCTICGRIS.ne30x8">.true.</use_init_interp>
-<!-- 2003 -->
-<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="2003" lnd_tuning_mode="clm6_0_cam7.0"
-                  maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="1.9x2.5"                 >.true.</use_init_interp>
 
 <!-- 2013 -->
 <use_init_interp  use_cndv=".false." use_fates=".false." sim_year="2013" lnd_tuning_mode="clm6_0_cam7.0"
@@ -815,18 +806,11 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 <!--
      clm5_1 physics with CAM6.0 grids (duplicates above)
 -->
-<!-- These first five are for SP mode and CLM5.1 only -->
-<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm5_1_cam6.0"
-                  maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="0.9x1.25"            >.true.</use_init_interp>
-<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm5_1_cam6.0"
-                  maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="1.9x2.5"             >.true.</use_init_interp>
+<!-- These next two are for SP mode and CLM5.1 only -->
 <use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm5_1_cam6.0"
                   maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="ne0np4.ARCTIC.ne30x4"    >.true.</use_init_interp>
 <use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm5_1_cam6.0"
                   maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="ne0np4.ARCTICGRIS.ne30x8">.true.</use_init_interp>
-<!-- 2003 -->
-<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="2003" lnd_tuning_mode="clm5_1_cam6.0"
-                  maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="1.9x2.5"                 >.true.</use_init_interp>
 
 <!-- 2013 -->
 <use_init_interp  use_cndv=".false." use_fates=".false." sim_year="2013" lnd_tuning_mode="clm5_1_cam6.0"
@@ -835,18 +819,11 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 <!--
      clm6_0 physics with CAM6.0 grids...
 -->
-<!-- These first five are for SP mode and CLM6.0 only -->
-<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm6_0_cam6.0"
-                  maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="0.9x1.25"            >.true.</use_init_interp>
-<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm6_0_cam6.0"
-                  maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="1.9x2.5"             >.true.</use_init_interp>
+<!-- These first two are for SP mode and CLM6.0 only -->
 <use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm6_0_cam6.0"
                   maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="ne0np4.ARCTIC.ne30x4"    >.true.</use_init_interp>
 <use_init_interp  use_cndv=".false." use_fates=".false." sim_year="1979" lnd_tuning_mode="clm6_0_cam6.0"
                   maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="ne0np4.ARCTICGRIS.ne30x8">.true.</use_init_interp>
-<!-- 2003 -->
-<use_init_interp  use_cndv=".false." use_fates=".false." sim_year="2003" lnd_tuning_mode="clm6_0_cam6.0"
-                  maxpft="17"        use_cn=".false."    use_crop=".false." hgrid="1.9x2.5"                 >.true.</use_init_interp>
 
 <!-- 2013 -->
 <use_init_interp  use_cndv=".false." use_fates=".false." sim_year="2013" lnd_tuning_mode="clm6_0_cam6.0"
@@ -936,6 +913,14 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 >hgrid=0.9x1.25 maxpft=79 mask=gx1v7 use_cn=.true. use_crop=.true. irrigate=.false. glc_nex=10 do_transient_pfts=.false. lnd_tuning_mode=clm6_0_GSWP3v1 use_excess_ice=.true.
 </init_interp_attributes>
 
+<init_interp_attributes sim_year="1850" use_cndv=".false." use_fates=".false." phys="clm6_0"
+			hgrid="1.9x2.5"
+>mask=gx1v7 use_cn=.true. do_transient_pfts=.false. use_excess_ice=.true. use_crop=.false. irrigate=.false.
+</init_interp_attributes>
+<init_interp_attributes sim_year="1850" use_cndv=".false." use_fates=".false." phys="clm6_0"
+			hgrid="ne30np4.pg3"
+>mask=tx2_3v2 use_cn=.true. do_transient_pfts=.false. use_excess_ice=.true. use_crop=.true. irrigate=.false.
+</init_interp_attributes>
 
 <!-- present day -->
 <init_interp_attributes sim_year="2000" use_cndv=".false." use_fates=".false." lnd_tuning_mode="clm4_5_GSWP3v1"
@@ -957,11 +942,16 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 <init_interp_attributes sim_year="2000" use_cndv=".false." use_fates=".false." lnd_tuning_mode="clm5_0_GSWP3v1"
 >hgrid=1.9x2.5 maxpft=79 mask=gx1v7 use_cn=.true. use_crop=.true. irrigate=.true. glc_nec=10 do_transient_pfts=.false. use_excess_ice=.false.
 </init_interp_attributes>
+
 <init_interp_attributes sim_year="2000" use_cndv=".false." use_fates=".false." phys="clm5_1"
->hgrid=0.9x1.25 maxpft=79 mask=gx1v7 use_cn=.true. use_crop=.true. irrigate=.true. glc_nex=10 do_transient_pfts=.false. lnd_tuning_mode=clm5_1_GSWP3v1 use_excess_ice=.true.
+>hgrid=0.9x1.25 maxpft=79 mask=gx1v7 use_cn=.true. use_crop=.true. irrigate=.true. glc_nex=10 do_transient_pfts=.false. use_excess_ice=.true.
+</init_interp_attributes>
+<init_interp_attributes sim_year="2000" use_cndv=".false." use_fates=".false." phys="clm6_0"
+>hgrid=0.9x1.25 maxpft=79 mask=gx1v7 use_cn=.true. use_crop=.true. irrigate=.true. glc_nex=10 do_transient_pfts=.false. use_excess_ice=.true.
 </init_interp_attributes>
 <init_interp_attributes sim_year="2000" use_cndv=".false." use_fates=".false." phys="clm6_0"
->hgrid=0.9x1.25 maxpft=79 mask=gx1v7 use_cn=.true. use_crop=.true. irrigate=.true. glc_nex=10 do_transient_pfts=.false. lnd_tuning_mode=clm6_0_GSWP3v1 use_excess_ice=.true.
+			hgrid="ne30np4.pg3"
+>hgrid=ne30np4.pg3 maxpft=79 mask=tx2_3v2 use_cn=.true. use_crop=.true. irrigate=.true. glc_nec=10 do_transient_pfts=.false. use_excess_ice=.true.
 </init_interp_attributes>
 
 <init_interp_attributes sim_year="2000" use_cndv=".false." use_fates=".false." lnd_tuning_mode="clm5_0_CRUv7"
@@ -1223,14 +1213,14 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 
 
 <!-- If an exact match for these grids and start years -->
-<init_interp_attributes sim_year="1979" use_cndv=".false." use_fates=".false." lnd_tuning_mode="clm6_0_cam6.0"
-                        hgrid="0.9x1.25" use_cn=".false." maxpft="17"
->hgrid=0.9x1.25 maxpft=17 mask=gx1v7 use_cn=.false. use_crop=.false. irrigate=.true. glc_nec=10 do_transient_pfts=.false. use_excess_ice=.false.
+<init_interp_attributes sim_year="1979" use_cndv=".false." use_fates=".false." phys="clm6_0"
+                        hgrid="0.9x1.25"
+>maxpft=79 mask=gx1v7 use_cn=.true. use_crop=.true. irrigate=.true. glc_nec=10 use_excess_ice=.true.
 </init_interp_attributes>
 
-<init_interp_attributes sim_year="1979" use_cndv=".false." use_fates=".false." lnd_tuning_mode="clm6_0_cam6.0"
-                        hgrid="1.9x2.5" use_cn=".false." maxpft="17"
->hgrid=1.9x2.5 maxpft=17 mask=gx1v7 use_cn=.false. use_crop=.false. irrigate=.true. glc_nec=10 do_transient_pfts=.false. use_excess_ice=.false.
+<init_interp_attributes sim_year="1979" use_cndv=".false." use_fates=".false." phys="clm6_0"
+                        hgrid="1.9x2.5"
+>hgrid=0.9x1.25 maxpft=79 mask=gx1v7 use_cn=.true. use_crop=.true. irrigate=.true. glc_nec=10 use_excess_ice=.true.
 </init_interp_attributes>
 
 <init_interp_attributes sim_year="1979" use_cndv=".false." use_fates=".false." lnd_tuning_mode="clm6_0_cam6.0"
@@ -1243,14 +1233,9 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 >hgrid=ne0np4.ARCTICGRIS.ne30x8 maxpft=17 mask=tx0.1v2 use_cn=.false. use_crop=.false. irrigate=.true. glc_nec=10 do_transient_pfts=.false. use_excess_ice=.false.
 </init_interp_attributes>
 
-<init_interp_attributes sim_year="1979" use_cndv=".false." use_fates=".false." lnd_tuning_mode="clm6_0_cam7.0"
-                        hgrid="0.9x1.25" use_cn=".false." maxpft="17"
->hgrid=0.9x1.25 maxpft=17 mask=gx1v7 use_cn=.false. use_crop=.false. irrigate=.true. glc_nec=10 do_transient_pfts=.false. use_excess_ice=.false.
-</init_interp_attributes>
-
-<init_interp_attributes sim_year="1979" use_cndv=".false." use_fates=".false." lnd_tuning_mode="clm6_0_cam7.0"
-                        hgrid="1.9x2.5" use_cn=".false." maxpft="17"
->hgrid=1.9x2.5 maxpft=17 mask=gx1v7 use_cn=.false. use_crop=.false. irrigate=.true. glc_nec=10 do_transient_pfts=.false. use_excess_ice=.false.
+<init_interp_attributes sim_year="1979" use_cndv=".false." use_fates=".false." phys="clm6_0"
+			hgrid="ne30np4.pg3"
+>maxpft=79 mask=tx2_3v2 use_cn=.true. use_crop=.true. irrigate=.true. glc_nec=10 use_excess_ice=.true.
 </init_interp_attributes>
 
 <init_interp_attributes sim_year="1979" use_cndv=".false." use_fates=".false." lnd_tuning_mode="clm6_0_cam7.0"
@@ -1263,12 +1248,6 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 >hgrid=ne0np4.ARCTICGRIS.ne30x8 maxpft=17 mask=tx0.1v2 use_cn=.false. use_crop=.false. irrigate=.true. glc_nec=10 do_transient_pfts=.false. use_excess_ice=.false.
 </init_interp_attributes>
 
-<!-- 2003 -->
-<init_interp_attributes sim_year="2003" use_cndv=".false." use_fates=".false." lnd_tuning_mode="clm6_0_cam7.0"
-                        hgrid="1.9x2.5" use_cn=".false." maxpft="17"
->hgrid=1.9x2.5 maxpft=17 mask=gx1v7 use_cn=.false. use_crop=.false. irrigate=.true. glc_nec=10 do_transient_pfts=.false. use_excess_ice=.false.
-</init_interp_attributes>
-
 <!-- 2013 IC's - exact match for CONUS grid ... -->
 <init_interp_attributes sim_year="2013" use_cndv=".false." use_fates=".false." lnd_tuning_mode="clm6_0_cam7.0"
 			hgrid="ne0np4CONUS.ne30x8" use_cn=".false." maxpft="17"
@@ -1354,18 +1333,31 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 </finidat>
 
 <!-- CTSM6_0 - use clm6_0_GSWP3v1 BgcCrop at f09 for all clm5_1/clm6_0 options -->
-<!-- use_init_interp true because the file was created with ctsm5.3 datasets -->
 <finidat hgrid="0.9x1.25" mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
          ic_ymd="18500101" sim_year="1850" do_transient_pfts=".false." use_excess_ice=".true."
          ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".false."
-         phys="clm5_1" use_init_interp=".true."
->lnd/clm2/initdata_esmf/ctsm5.3/ctsm52026_f09_pSASU.clm2.r.0421-01-01-00000.nc
+         phys="clm5_1"
+>lnd/clm2/initdata_esmf/ctsm5.3/ctsm53n04ctsm52028_f09_g17_BgcCrop_exice_pSASU.clm60.r.0161-01-01.nc
 </finidat>
 <finidat hgrid="0.9x1.25" mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
          ic_ymd="18500101" sim_year="1850" do_transient_pfts=".false." use_excess_ice=".true."
          ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".false."
-         phys="clm6_0" use_init_interp=".true."
->lnd/clm2/initdata_esmf/ctsm5.3/ctsm52026_f09_pSASU.clm2.r.0421-01-01-00000.nc
+         phys="clm6_0"
+>lnd/clm2/initdata_esmf/ctsm5.3/ctsm53n04ctsm52028_f09_g17_BgcCrop_exice_pSASU.clm60.r.0161-01-01.nc
+</finidat>
+<!-- Corresponding ne30 -->
+<finidat hgrid="ne30np4.pg3" mask="tx2_3v2" use_cn=".true." use_cndv=".false." use_fates=".false."
+         sim_year="1850" do_transient_pfts=".false." use_excess_ice=".true."
+         use_crop=".true." irrigate=".false."
+         phys="clm6_0"
+>lnd/clm2/initdata_esmf/ctsm5.3/ctsm53n04ctsm52028_ne30pg3t232_BgcCrop_exice_pSASU.clm60.r.0121-01-01.nc
+</finidat>
+<!-- Corresponding f19 -->
+<finidat hgrid="1.9x2.5" mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
+         sim_year="1850" do_transient_pfts=".false." use_excess_ice=".true."
+         use_crop=".false." irrigate=".false."
+         phys="clm6_0"
+>lnd/clm2/initdata_esmf/ctsm5.3/ctsm530_f19_g17_Bgc_exice_pSASU.clm60.r.0161-01-01.nc
 </finidat>
 
 <!--
@@ -1408,13 +1400,6 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
          lnd_tuning_mode="clm5_1_GSWP3v1" use_init_interp=".true."
 >lnd/clm2/initdata_esmf/ctsm5.2/clmi.I2000Clm50BgcCrop.2011-01-01.1.9x2.5_gx1v7_gl4_simyr2000_c240223.nc
 </finidat>
-<!-- NB: This pSASU finidat is from an f09 1850 (rather than f19 2000) spin-up -->
-<finidat hgrid="1.9x2.5"    maxpft="79"  mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
-         ic_ymd="20110101" sim_year="2000" do_transient_pfts=".false." use_excess_ice=".true."
-         ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
-         phys="clm6_0" use_init_interp=".true."
->lnd/clm2/initdata_esmf/ctsm5.3/ctsm52026_f09_pSASU.clm2.r.0421-01-01-00000.nc
-</finidat>
 
 
 <!-- This is the same file as above but, for a different tuning mode -->
@@ -1493,21 +1478,27 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 
 
 <!-- clm5_1 and cam7.0 -->
-<!-- NB: This pSASU finidat is from an 1850 spin-up -->
 <finidat hgrid="0.9x1.25"    maxpft="79"  mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
-         ic_ymd="20000101" sim_year="2000" do_transient_pfts=".false." use_excess_ice=".true."
+         ic_ymd="20000101" sim_year="2000" use_excess_ice=".true."
          ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
          phys="clm5_1" use_init_interp=".true."
->lnd/clm2/initdata_esmf/ctsm5.3/ctsm52026_f09_pSASU.clm2.r.0421-01-01-00000.nc
+>lnd/clm2/initdata_esmf/ctsm5.3/ctsm53n04ctsm52028_f09_g17_BgcCrop_exice_hist.clm60.r.2000-01-01.nc
 </finidat>
 
 <!-- clm6_0 and cam7.0 -->
-<!-- NB: This pSASU finidat is from an 1850 spin-up -->
+<!-- slevis-lmwg, ekluzek 2024/10/11: do_transient_pfts was removed here to bypass a bug that doesn't allow
+           do_transient_pfts=.true. when use_init_interp=.false. -->
 <finidat hgrid="0.9x1.25"    maxpft="79"  mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
-         ic_ymd="20000101" sim_year="2000" do_transient_pfts=".false." use_excess_ice=".true."
+         ic_ymd="20000101" sim_year="2000" use_excess_ice=".true."
+         ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
+         phys="clm6_0" use_init_interp=".true."
+>lnd/clm2/initdata_esmf/ctsm5.3/ctsm53n04ctsm52028_f09_g17_BgcCrop_exice_hist.clm60.r.2000-01-01.nc
+</finidat>
+<finidat hgrid="ne30np4.pg3"    maxpft="79"  mask="tx2_3v2" use_cn=".true." use_cndv=".false." use_fates=".false."
+         ic_ymd="20000101" sim_year="2000" use_excess_ice=".true."
          ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
          phys="clm6_0" use_init_interp=".true."
->lnd/clm2/initdata_esmf/ctsm5.3/ctsm52026_f09_pSASU.clm2.r.0421-01-01-00000.nc
+>lnd/clm2/initdata_esmf/ctsm5.3/ctsm53n04ctsm52028_ne30pg3t232_BgcCrop_exice_hist.clm60.r.2000-01-01.nc
 </finidat>
 
 <!-- clm5_0 and cam7.0 -->
@@ -1527,19 +1518,12 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
          lnd_tuning_mode="clm5_0_cam7.0" use_init_interp=".true."
 >lnd/clm2/initdata_map/clmi.FHISTSp.2013-01-01.ne0CONUSne30x8_mt12_simyr2013_c200806.nc
 </finidat>
-<!-- Repeat above for clm5_1 -->
-<finidat hgrid="0.9x1.25"  maxpft="17"  mask="gx1v7" use_cn=".false." use_cndv=".false." use_fates=".false."
-         ic_ymd="19790101"  sim_year="1979" do_transient_pfts=".false." use_excess_ice=".false."
-         ic_tod="0" glc_nec="10" use_crop=".false." irrigate=".true."
-         lnd_tuning_mode="clm5_1_cam7.0" use_init_interp=".true."
->lnd/clm2/initdata_map/clmi.BHIST.2000-01-01.0.9x1.25_gx1v7_simyr1979_c200806.nc
-</finidat>
-
-<finidat hgrid="1.9x2.5"   maxpft="17"  mask="gx1v7" use_cn=".false." use_cndv=".false." use_fates=".false."
-         ic_ymd="19790101"  sim_year="1979" do_transient_pfts=".false." use_excess_ice=".false."
-         ic_tod="0" glc_nec="10" use_crop=".false." irrigate=".true."
-         lnd_tuning_mode="clm5_1_cam7.0" use_init_interp=".true."
->lnd/clm2/initdata_map/clmi.BHIST.2000-01-01.1.9x2.5_gx1v7_simyr1979_c200806.nc
+<!-- Repeat for clm5_1 -->
+<finidat hgrid="0.9x1.25" maxpft="79"  mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
+         ic_ymd="19790101"  sim_year="1979" use_excess_ice=".true."
+         ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
+         phys="clm5_1" use_init_interp=".true."
+>lnd/clm2/initdata_esmf/ctsm5.3/ctsm53n04ctsm52028_f09_g17_BgcCrop_exice_hist.clm60.r.1979-01-01.nc
 </finidat>
 
 <!-- Present day no crop spinup ARCTIC grid with irrigation on -->
@@ -1567,22 +1551,6 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 </finidat>
 
 <!-- Present day for coupled cases at 1-degree or lower resolutions  -->
-<!-- NB: This pSASU finidat is from an 1850 spin-up -->
-<finidat hgrid="0.9x1.25"    maxpft="79"  mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
-         ic_ymd="20000101" sim_year="2000" do_transient_pfts=".false." use_excess_ice=".true."
-         ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
-         phys="clm5_1" use_init_interp=".true."
->lnd/clm2/initdata_esmf/ctsm5.3/ctsm52026_f09_pSASU.clm2.r.0421-01-01-00000.nc
-</finidat>
-
-<!-- 2003 -->
-<finidat hgrid="1.9x2.5"   maxpft="17"  mask="gx1v7" use_cn=".false." use_cndv=".false." use_fates=".false."
-         ic_ymd="20030101"  sim_year="2003" do_transient_pfts=".false." use_excess_ice=".false."
-         ic_tod="0" glc_nec="10" use_crop=".false." irrigate=".true."
-         lnd_tuning_mode="clm5_1_cam7.0" use_init_interp=".true."
->lnd/clm2/initdata_map/clmi.BHISTSp.2000-01-01.1.9x2.5_gx1v7_simyr2003_c200807.nc
-</finidat>
-
 
 <!-- 2013 -->
 <finidat hgrid="ne0np4CONUS.ne30x8"    maxpft="17"  mask="tx0.1v2" use_cn=".false." use_cndv=".false." use_fates=".false."
@@ -1592,18 +1560,19 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 >lnd/clm2/initdata_map/clmi.FHISTSp.2013-01-01.ne0CONUSne30x8_mt12_simyr2013_c200806.nc
 </finidat>
 <!-- Repeat above for clm6_0 -->
-<finidat hgrid="0.9x1.25"  maxpft="17"  mask="gx1v7" use_cn=".false." use_cndv=".false." use_fates=".false."
-         ic_ymd="19790101"  sim_year="1979" do_transient_pfts=".false." use_excess_ice=".false."
-         ic_tod="0" glc_nec="10" use_crop=".false." irrigate=".true."
-         lnd_tuning_mode="clm6_0_cam7.0" use_init_interp=".true."
->lnd/clm2/initdata_map/clmi.BHIST.2000-01-01.0.9x1.25_gx1v7_simyr1979_c200806.nc
+<!-- slevis-lmwg, ekluzek 2024/10/11: do_transient_pfts was removed here to bypass a bug that doesn't allow
+           do_transient_pfts=.true. when use_init_interp=.false. -->
+<finidat hgrid="0.9x1.25" maxpft="79"  mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
+         ic_ymd="19790101"  sim_year="1979" use_excess_ice=".true."
+         ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
+         phys="clm6_0" use_init_interp=".true."
+>lnd/clm2/initdata_esmf/ctsm5.3/ctsm53n04ctsm52028_f09_g17_BgcCrop_exice_hist.clm60.r.1979-01-01.nc
 </finidat>
-
-<finidat hgrid="1.9x2.5"   maxpft="17"  mask="gx1v7" use_cn=".false." use_cndv=".false." use_fates=".false."
-         ic_ymd="19790101"  sim_year="1979" do_transient_pfts=".false." use_excess_ice=".false."
-         ic_tod="0" glc_nec="10" use_crop=".false." irrigate=".true."
-         lnd_tuning_mode="clm6_0_cam7.0" use_init_interp=".true."
->lnd/clm2/initdata_map/clmi.BHIST.2000-01-01.1.9x2.5_gx1v7_simyr1979_c200806.nc
+<finidat hgrid="ne30np4.pg3" maxpft="79"  mask="tx2_3v2" use_cn=".true." use_cndv=".false." use_fates=".false."
+         ic_ymd="19790101"  sim_year="1979" use_excess_ice=".true."
+         ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
+         phys="clm6_0" use_init_interp=".true."
+>lnd/clm2/initdata_esmf/ctsm5.3/ctsm53n04ctsm52028_ne30pg3t232_BgcCrop_exice_hist.clm60.r.1979-01-01.nc
 </finidat>
 
 <!-- Present day no crop spinup ARCTIC grid with irrigation on -->
@@ -1631,22 +1600,6 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 </finidat>
 
 <!-- Present day for coupled cases at 1-degree or lower resolutions  -->
-<!-- NB: This pSASU finidat is from an 1850 spin-up -->
-<finidat hgrid="0.9x1.25"    maxpft="79"  mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
-         ic_ymd="20000101" sim_year="2000" do_transient_pfts=".false." use_excess_ice=".true."
-         ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
-         phys="clm6_0" use_init_interp=".true."
->lnd/clm2/initdata_esmf/ctsm5.3/ctsm52026_f09_pSASU.clm2.r.0421-01-01-00000.nc
-</finidat>
-
-<!-- 2003 -->
-<finidat hgrid="1.9x2.5"   maxpft="17"  mask="gx1v7" use_cn=".false." use_cndv=".false." use_fates=".false."
-         ic_ymd="20030101"  sim_year="2003" do_transient_pfts=".false." use_excess_ice=".false."
-         ic_tod="0" glc_nec="10" use_crop=".false." irrigate=".true."
-         lnd_tuning_mode="clm6_0_cam7.0" use_init_interp=".true."
->lnd/clm2/initdata_map/clmi.BHISTSp.2000-01-01.1.9x2.5_gx1v7_simyr2003_c200807.nc
-</finidat>
-
 
 <!-- 2013 -->
 <finidat hgrid="ne0np4CONUS.ne30x8"    maxpft="17"  mask="tx0.1v2" use_cn=".false." use_cndv=".false." use_fates=".false."
@@ -1706,22 +1659,6 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 >lnd/clm2/initdata_map/clmi.BHIST.2000-01-01.0.9x1.25_gx1v7_simyr2000_c200728.nc
 </finidat>
 
-<!-- NB: This pSASU finidat is from an 1850 spin-up -->
-<finidat hgrid="0.9x1.25"    maxpft="79"  mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
-         ic_ymd="20000101" sim_year="2000" do_transient_pfts=".false." use_excess_ice=".true."
-         ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
-         phys="clm5_1" use_init_interp=".true."
->lnd/clm2/initdata_esmf/ctsm5.3/ctsm52026_f09_pSASU.clm2.r.0421-01-01-00000.nc
-</finidat>
-
-<!-- NB: This pSASU finidat is from an 1850 spin-up -->
-<finidat hgrid="0.9x1.25"    maxpft="79"  mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
-         ic_ymd="20000101" sim_year="2000" do_transient_pfts=".false." use_excess_ice=".true."
-         ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
-         phys="clm6_0" use_init_interp=".true."
->lnd/clm2/initdata_esmf/ctsm5.3/ctsm52026_f09_pSASU.clm2.r.0421-01-01-00000.nc
-</finidat>
-
 <!-- 2003 -->
 <finidat hgrid="1.9x2.5"   maxpft="17"  mask="gx1v7" use_cn=".false." use_cndv=".false." use_fates=".false."
          ic_ymd="20030101"  sim_year="2003" do_transient_pfts=".false." use_excess_ice=".false."
@@ -1739,21 +1676,6 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 >lnd/clm2/initdata_map/clmi.FHISTSp.2013-01-01.ne0CONUSne30x8_mt12_simyr2013_c200806.nc
 </finidat>
 <!-- Repeat above for clm5_1 -->
-<!-- clm5_1 and cam6.0-->
-<finidat hgrid="0.9x1.25"  maxpft="17"  mask="gx1v7" use_cn=".false." use_cndv=".false." use_fates=".false."
-         ic_ymd="19790101"  sim_year="1979" do_transient_pfts=".false." use_excess_ice=".false."
-         ic_tod="0" glc_nec="10" use_crop=".false." irrigate=".true."
-         lnd_tuning_mode="clm5_1_cam6.0" use_init_interp=".true."
->lnd/clm2/initdata_map/clmi.BHIST.2000-01-01.0.9x1.25_gx1v7_simyr1979_c200806.nc
-</finidat>
-
-<finidat hgrid="1.9x2.5"   maxpft="17"  mask="gx1v7" use_cn=".false." use_cndv=".false." use_fates=".false."
-         ic_ymd="19790101"  sim_year="1979" do_transient_pfts=".false." use_excess_ice=".false."
-         ic_tod="0" glc_nec="10" use_crop=".false." irrigate=".true."
-         lnd_tuning_mode="clm5_1_cam6.0" use_init_interp=".true."
->lnd/clm2/initdata_map/clmi.BHIST.2000-01-01.1.9x2.5_gx1v7_simyr1979_c200806.nc
-</finidat>
-
 <!-- Present day no crop spinup ARCTIC grid with irrigation on -->
 <finidat hgrid="ne0np4.ARCTIC.ne30x4"    maxpft="17"  mask="tx0.1v2" use_cn=".false." use_cndv=".false." use_fates=".false."
          ic_ymd="19790101"  sim_year="1979" do_transient_pfts=".false." use_excess_ice=".false."
@@ -1779,22 +1701,6 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 </finidat>
 
 <!-- Present day for coupled cases at 1-degree or lower resolutions  -->
-<!-- NB: This pSASU finidat is from an 1850 spin-up -->
-<finidat hgrid="0.9x1.25"    maxpft="79"  mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
-         ic_ymd="20000101" sim_year="2000" do_transient_pfts=".false." use_excess_ice=".true."
-         ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
-         phys="clm5_1" use_init_interp=".true."
->lnd/clm2/initdata_esmf/ctsm5.3/ctsm52026_f09_pSASU.clm2.r.0421-01-01-00000.nc
-</finidat>
-
-<!-- 2003 -->
-<finidat hgrid="1.9x2.5"   maxpft="17"  mask="gx1v7" use_cn=".false." use_cndv=".false." use_fates=".false."
-         ic_ymd="20030101"  sim_year="2003" do_transient_pfts=".false." use_excess_ice=".false."
-         ic_tod="0" glc_nec="10" use_crop=".false." irrigate=".true."
-         lnd_tuning_mode="clm5_1_cam6.0" use_init_interp=".true."
->lnd/clm2/initdata_map/clmi.BHISTSp.2000-01-01.1.9x2.5_gx1v7_simyr2003_c200807.nc
-</finidat>
-
 
 <!-- 2013 -->
 <finidat hgrid="ne0np4CONUS.ne30x8"    maxpft="17"  mask="tx0.1v2" use_cn=".false." use_cndv=".false." use_fates=".false."
@@ -1805,19 +1711,6 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 </finidat>
 <!-- Repeat above for clm6_0 -->
 <!-- clm6_0 and cam6.0-->
-<finidat hgrid="0.9x1.25"  maxpft="17"  mask="gx1v7" use_cn=".false." use_cndv=".false." use_fates=".false."
-         ic_ymd="19790101"  sim_year="1979" do_transient_pfts=".false." use_excess_ice=".false."
-         ic_tod="0" glc_nec="10" use_crop=".false." irrigate=".true."
-         lnd_tuning_mode="clm6_0_cam6.0" use_init_interp=".true."
->lnd/clm2/initdata_map/clmi.BHIST.2000-01-01.0.9x1.25_gx1v7_simyr1979_c200806.nc
-</finidat>
-
-<finidat hgrid="1.9x2.5"   maxpft="17"  mask="gx1v7" use_cn=".false." use_cndv=".false." use_fates=".false."
-         ic_ymd="19790101"  sim_year="1979" do_transient_pfts=".false." use_excess_ice=".false."
-         ic_tod="0" glc_nec="10" use_crop=".false." irrigate=".true."
-         lnd_tuning_mode="clm6_0_cam6.0" use_init_interp=".true."
->lnd/clm2/initdata_map/clmi.BHIST.2000-01-01.1.9x2.5_gx1v7_simyr1979_c200806.nc
-</finidat>
 
 <!-- Present day no crop spinup ARCTIC grid with irrigation on -->
 <finidat hgrid="ne0np4.ARCTIC.ne30x4"    maxpft="17"  mask="tx0.1v2" use_cn=".false." use_cndv=".false." use_fates=".false."
@@ -1844,22 +1737,6 @@ attributes from the config_cache.xml file (with keys converted to upper-case).
 </finidat>
 
 <!-- Present day for coupled cases at 1-degree or lower resolutions  -->
-<!-- NB: This pSASU finidat is from an 1850 spin-up -->
-<finidat hgrid="0.9x1.25"    maxpft="79"  mask="gx1v7" use_cn=".true." use_cndv=".false." use_fates=".false."
-         ic_ymd="20000101" sim_year="2000" do_transient_pfts=".false." use_excess_ice=".true."
-         ic_tod="0" glc_nec="10" use_crop=".true." irrigate=".true."
-         phys="clm6_0" use_init_interp=".true."
->lnd/clm2/initdata_esmf/ctsm5.3/ctsm52026_f09_pSASU.clm2.r.0421-01-01-00000.nc
-</finidat>
-
-<!-- 2003 -->
-<finidat hgrid="1.9x2.5"   maxpft="17"  mask="gx1v7" use_cn=".false." use_cndv=".false." use_fates=".false."
-         ic_ymd="20030101"  sim_year="2003" do_transient_pfts=".false." use_excess_ice=".false."
-         ic_tod="0" glc_nec="10" use_crop=".false." irrigate=".true."
-         lnd_tuning_mode="clm6_0_cam6.0" use_init_interp=".true."
->lnd/clm2/initdata_map/clmi.BHISTSp.2000-01-01.1.9x2.5_gx1v7_simyr2003_c200807.nc
-</finidat>
-
 
 <!-- 2013 -->
 <finidat hgrid="ne0np4CONUS.ne30x8"    maxpft="17"  mask="tx0.1v2" use_cn=".false." use_cndv=".false." use_fates=".false."
diff --git a/doc/ChangeLog b/doc/ChangeLog
index 737bec2b97..e6804811d2 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,4 +1,84 @@
 ===============================================================
+Tag name: ctsm5.3.007
+Originator(s): slevis (Samuel Levis,UCAR/TSS,303-665-1310)
+Date: Mon 13 Oct 2024 11:04:18 AM MDT
+One-line Summary: Clm60 finidat updates for ne30, f09, f19 grids
+
+Purpose and description of changes
+----------------------------------
+ Updates appear in namelist_defaults_ctsm.xml.
+ For the most part I updated clm51 to match clm60, though clm51 will go away soon.
+ I had significant help from Erik Kluzek in disentangling the .xml settings
+ so that cases would pick up the correct finidat and other namelist settings.
+
+Significant changes to scientifically-supported configurations
+--------------------------------------------------------------
+
+Does this tag change answers significantly for any of the following physics configurations?
+(Details of any changes will be given in the "Answer changes" section below.)
+
+    [Put an [X] in the box for any configuration with significant answer changes.]
+
+[X] clm6_0
+
+[ ] clm5_1
+
+[ ] clm5_0
+
+[ ] ctsm5_0-nwp
+
+[ ] clm4_5
+
+
+Bugs fixed
+----------
+List of CTSM issues fixed (include CTSM Issue # and description) [one per line]:
+ Relates to #2403 but may need more work to close the issue
+
+Notes of particular relevance for users
+---------------------------------------
+Changes made to namelist defaults (e.g., changed parameter values):
+ Clm60 and clm51 finidat updates for ne30, f09, f19 grids.
+
+Changes to the datasets (e.g., parameter, surface or initial files):
+ Clm60 and clm51 finidat updates for ne30, f09, f19 grids.
+
+Testing summary:
+----------------
+
+ [PASS means all tests PASS; OK means tests PASS other than expected fails.]
+
+  build-namelist tests (if CLMBuildNamelist.pm has changed):
+
+    derecho - PASS
+
+  python testing (if python code has changed; see instructions in python/README.md; document testing done):
+
+    derecho - PASS
+
+  regular tests (aux_clm: https://github.com/ESCOMP/CTSM/wiki/System-Testing-Guide#pre-merge-system-testing):
+
+    derecho ----- OK
+    izumi ------- OK
+
+
+Answer changes
+--------------
+
+Changes answers relative to baseline: Yes.
+
+  Summarize any changes to answers, i.e.,
+    - what code configurations: clm60 and clm51; the latter goes away soon
+    - what platforms/compilers: all
+    - nature of change: larger than roundoff/same climate
+
+Other details
+-------------
+Pull Requests that document the changes (include PR ids):
+ https://github.com/ESCOMP/ctsm/pull/2821
+
+===============================================================
+===============================================================
 Tag name: ctsm5.3.006
 Originator(s): samrabin (Sam Rabin, UCAR/TSS, samrabin@ucar.edu)
 Date: Fri Oct 11 07:01:09 MDT 2024
@@ -200,7 +280,14 @@ Testing summary:
 Answer changes
 --------------
 
-Changes answers relative to baseline: Not in real runs, only our testing.
+Changes answers relative to baseline: Yes
+
+  Summarize any changes to answers, i.e.,
+    - what code configurations: Hillslope (tests only)
+    - what platforms/compilers: Tests on Izumi and Derecho
+    - nature of change: Larger than roundoff
+
+   Only our tests are affected because I had to make changes to the test setup for compatibility; this included changing mesh file and hillslope data for some tests/testmods.
 
 
 Other details
diff --git a/doc/ChangeSum b/doc/ChangeSum
index f74348094c..7d01340622 100644
--- a/doc/ChangeSum
+++ b/doc/ChangeSum
@@ -1,5 +1,6 @@
 Tag                   Who      Date  Summary
 ============================================================================================================================
+       ctsm5.3.007   slevis 10/14/2024 Clm60 finidat updates for ne30, f09, f19 grids
        ctsm5.3.006 samrabin 10/11/2024 Merge b4b-dev
        ctsm5.3.005     erik 10/10/2024 Hardcoded tuning adjustments for Leung_2024 dust emissions
        ctsm5.3.004 samrabin 10/07/2024 Move hillslope data off surface datasets