diff --git a/cime_config/config_grids.xml b/cime_config/config_grids.xml
index d246a624b2a6..abed3f93ab54 100755
--- a/cime_config/config_grids.xml
+++ b/cime_config/config_grids.xml
@@ -399,6 +399,16 @@
       <mask>ECwISC30to60E2r1</mask>
     </model_grid>
 
+    <model_grid alias="T62_ECwISC30to60E3r2" compset="(DATM|XATM|SATM)">
+      <grid name="atm">T62</grid>
+      <grid name="lnd">T62</grid>
+      <grid name="ocnice">ECwISC30to60E3r2</grid>
+      <grid name="rof">rx1</grid>
+      <grid name="glc">null</grid>
+      <grid name="wav">null</grid>
+      <mask>ECwISC30to60E3r2</mask>
+    </model_grid>
+
     <model_grid alias="TL319_oEC60to30v3" compset="(DATM|XATM|SATM)">
       <grid name="atm">TL319</grid>
       <grid name="lnd">TL319</grid>
@@ -509,6 +519,16 @@
       <mask>ECwISC30to60E2r1</mask>
     </model_grid>
 
+    <model_grid alias="TL319_ECwISC30to60E3r2" compset="(DATM|XATM|SATM)">
+      <grid name="atm">TL319</grid>
+      <grid name="lnd">TL319</grid>
+      <grid name="ocnice">ECwISC30to60E3r2</grid>
+      <grid name="rof">JRA025</grid>
+      <grid name="glc">null</grid>
+      <grid name="wav">null</grid>
+      <mask>ECwISC30to60E3r2</mask>
+    </model_grid>
+
     <model_grid alias="TL319_oRRS18to6v3" compset="(DATM|XATM|SATM)">
       <grid name="atm">TL319</grid>
       <grid name="lnd">TL319</grid>
@@ -1183,6 +1203,16 @@
       <mask>ECwISC30to60E2r1</mask>
     </model_grid>
 
+    <model_grid alias="ne30pg2_ECwISC30to60E3r2">
+      <grid name="atm">ne30np4.pg2</grid>
+      <grid name="lnd">ne30np4.pg2</grid>
+      <grid name="ocnice">ECwISC30to60E3r2</grid>
+      <grid name="rof">r05</grid>
+      <grid name="glc">null</grid>
+      <grid name="wav">null</grid>
+      <mask>ECwISC30to60E3r2</mask>
+    </model_grid>
+
     <model_grid alias="northamericax4v1_r0125_northamericax4v1" compset="(DOCN|XOCN|SOCN|AQP1)">
       <grid name="atm">ne0np4_northamericax4v1</grid>
       <grid name="lnd">r0125</grid>
@@ -1426,6 +1456,16 @@
       <mask>EC30to60E2r2</mask>
     </model_grid>
 
+    <model_grid alias="ne120pg2_r05_ECwISC30to60E3r2">
+      <grid name="atm">ne120np4.pg2</grid>
+      <grid name="lnd">r05</grid>
+      <grid name="ocnice">ECwISC30to60E3r2</grid>
+      <grid name="rof">r05</grid>
+      <grid name="glc">null</grid>
+      <grid name="wav">null</grid>
+      <mask>ECwISC30to60E3r2</mask>
+    </model_grid>
+
     <model_grid alias="ne240_ne240" compset="(DOCN|XOCN|SOCN|AQP1)">
       <grid name="atm">ne240np4</grid>
       <grid name="lnd">ne240np4</grid>
@@ -1984,6 +2024,16 @@
       <mask>EC30to60E2r2</mask>
     </model_grid>
 
+    <model_grid alias="ne30pg2_r05_ECwISC30to60E3r2">
+      <grid name="atm">ne30np4.pg2</grid>
+      <grid name="lnd">r05</grid>
+      <grid name="ocnice">ECwISC30to60E3r2</grid>
+      <grid name="rof">r05</grid>
+      <grid name="glc">null</grid>
+      <grid name="wav">null</grid>
+      <mask>ECwISC30to60E3r2</mask>
+    </model_grid>
+
     <model_grid alias="ne30pg2_r05_WC14to60E2r3">
       <grid name="atm">ne30np4.pg2</grid>
       <grid name="lnd">r05</grid>
@@ -2293,6 +2343,7 @@
       <file grid="atm|lnd" mask="WCAtl12to45E2r4">$DIN_LOC_ROOT/share/domains/domain.lnd.T62_WCAtl12to45E2r4.210318.nc</file>
       <file grid="atm|lnd" mask="SOwISC12to60E2r4">$DIN_LOC_ROOT/share/domains/domain.lnd.T62_SOwISC12to60E2r4.210119.nc</file>
       <file grid="atm|lnd" mask="ECwISC30to60E2r1">$DIN_LOC_ROOT/share/domains/domain.lnd.T62_ECwISC30to60E2r1.201007.nc</file>
+      <file grid="atm|lnd" mask="ECwISC30to60E3r2">$DIN_LOC_ROOT/share/domains/domain.lnd.T62_ECwISC30to60E3r2.231018.nc</file>
       <desc>T62 is Gaussian grid:</desc>
     </domain>
 
@@ -2335,6 +2386,8 @@
       <file grid="ice|ocn" mask="SOwISC12to60E2r4">$DIN_LOC_ROOT/share/domains/domain.ocn.TL319_SOwISC12to60E2r4.210119.nc</file>
       <file grid="atm|lnd" mask="ECwISC30to60E2r1">$DIN_LOC_ROOT/share/domains/domain.lnd.TL319_ECwISC30to60E2r1.201007.nc</file>
       <file grid="ice|ocn" mask="ECwISC30to60E2r1">$DIN_LOC_ROOT/share/domains/domain.ocn.TL319_ECwISC30to60E2r1.201007.nc</file>
+      <file grid="atm|lnd" mask="ECwISC30to60E3r2">$DIN_LOC_ROOT/share/domains/domain.lnd.TL319_ECwISC30to60E3r2.231018.nc</file>
+      <file grid="ice|ocn" mask="ECwISC30to60E3r2">$DIN_LOC_ROOT/share/domains/domain.ocn.TL319_ECwISC30to60E3r2.231018.nc</file>
       <file grid="atm|lnd" mask="oRRS18to6v3">$DIN_LOC_ROOT/share/domains/domain.lnd.TL319_oRRS18to6v3.220124.nc</file>
       <file grid="ice|ocn" mask="oRRS18to6v3">$DIN_LOC_ROOT/share/domains/domain.ocn.TL319_oRRS18to6v3.220124.nc</file>
       <desc>TL319 is JRA lat/lon grid:</desc>
@@ -2407,6 +2460,8 @@
       <file grid="atm|lnd" mask="oEC60to30v3">$DIN_LOC_ROOT/share/domains/domain.lnd.ne30np4_oEC60to30v3.161222.nc</file>
       <file grid="atm" mask="oEC60to30v3wLI">$DIN_LOC_ROOT/share/domains/domain.lnd.ne30np4_oEC60to30v3wLI_mask.170802.nc</file>
       <file grid="atm|lnd" mask="ECwISC30to60E1r2">$DIN_LOC_ROOT/share/domains/domain.lnd.ne30np4_ECwISC30to60E1r2.200410.nc</file>
+      <file grid="atm|lnd" mask="oRRS18to6v3">$DIN_LOC_ROOT/share/domains/domain.lnd.ne30pg2_oRRS18to6v3.211101.nc</file>
+      <file grid="ice|ocn" mask="oRRS18to6v3">$DIN_LOC_ROOT/share/domains/domain.ocn.ne30pg2_oRRS18to6v3.211101.nc</file>
       <file grid="atm|lnd" mask="oRRS30to10v3">$DIN_LOC_ROOT/share/domains/domain.lnd.ne30np4_oRRS30to10v3.171101.nc</file>
       <file grid="atm|lnd" mask="oRRS30to10v3wLI">$DIN_LOC_ROOT/share/domains/domain.lnd.ne30np4_oRRS30to10v3wLI_mask.171109.nc</file>
       <file grid="ice|ocn" mask="gx1v6">$DIN_LOC_ROOT/share/domains/domain.ocn.ne30np4_gx1v6_110217.nc</file>
@@ -2440,6 +2495,8 @@
       <file grid="ice|ocn" mask="ECwISC30to60E2r1">$DIN_LOC_ROOT/share/domains/domain.ocn.ne30pg2_ECwISC30to60E2r1.201007.nc</file>
       <file grid="atm|lnd" mask="oRRS18to6v3">$DIN_LOC_ROOT/share/domains/domain.lnd.ne30pg2_oRRS18to6v3.211101.nc</file>
       <file grid="ice|ocn" mask="oRRS18to6v3">$DIN_LOC_ROOT/share/domains/domain.ocn.ne30pg2_oRRS18to6v3.211101.nc</file>
+      <file grid="atm|lnd" mask="ECwISC30to60E3r2">$DIN_LOC_ROOT/share/domains/domain.lnd.ne30pg2_ECwISC30to60E3r2.231018.nc</file>
+      <file grid="ice|ocn" mask="ECwISC30to60E3r2">$DIN_LOC_ROOT/share/domains/domain.ocn.ne30pg2_ECwISC30to60E3r2.231018.nc</file>
       <file grid="atm|lnd" mask="gx1v6">$DIN_LOC_ROOT/share/domains/domain.lnd.ne30pg2_gx1v6.190806.nc</file>
       <file grid="ice|ocn" mask="gx1v6">$DIN_LOC_ROOT/share/domains/domain.ocn.ne30pg2_gx1v6.190806.nc</file>
       <desc>ne30np4.pg2 is Spectral Elem 1-deg grid w/ 2x2 FV physics grid per element:</desc>
@@ -2509,6 +2566,8 @@
       <file grid="ice|ocn" mask="EC30to60E2r2">$DIN_LOC_ROOT/share/domains/domain.ocn.ne120pg2_EC30to60E2r2.210312.nc</file>
       <file grid="atm|lnd" mask="ICOS10">$DIN_LOC_ROOT/share/domains/domain.lnd.ne120pg2_ICOS10.230120.nc</file>
       <file grid="ice|ocn" mask="ICOS10">$DIN_LOC_ROOT/share/domains/domain.ocn.ne120pg2_ICOS10.230120.nc</file>
+      <file grid="atm|lnd" mask="ECwISC30to60E3r2">$DIN_LOC_ROOT/share/domains/domain.lnd.ne120pg2_ECwISC30to60E3r2.231018.nc</file>
+      <file grid="ice|ocn" mask="ECwISC30to60E3r2">$DIN_LOC_ROOT/share/domains/domain.ocn.ne120pg2_ECwISC30to60E3r2.231018.nc</file>
       <file grid="atm|lnd" mask="gx1v6">$DIN_LOC_ROOT/share/domains/domain.lnd.ne120pg2_gx1v6.190819.nc</file>
       <file grid="ice|ocn" mask="gx1v6">$DIN_LOC_ROOT/share/domains/domain.ocn.ne120pg2_gx1v6.190819.nc</file>
       <desc>ne120np4 is Spectral Elem 1/4-deg grid w/ 2x2 FV physics grid</desc>
@@ -2579,7 +2638,7 @@
 
 
 
-    
+
 
     <!--=====================================================================-->
     <!--=====================================================================-->
@@ -2705,6 +2764,13 @@
       <desc>ECwISC30to60E2r1 is a MPAS ocean grid generated with the jigsaw/compass process using the eddy closure density function that has 30 km gridcells at the equator, 60 km at mid-latitudes, and 35 km at high latitudes. Additionally, it has ocean in ice-shelf cavities:</desc>
     </domain>
 
+    <domain name="ECwISC30to60E3r2">
+      <nx>237954</nx>
+      <ny>1</ny>
+      <file grid="ice|ocn">$DIN_LOC_ROOT/share/domains/domain.ocn.ECwISC30to60E3r2.231018.nc</file>
+      <desc>ECwISC30to60E3r2 is a MPAS ocean grid generated with the jigsaw/compass process using the eddy closure density function that has 30 km gridcells at the equator, 60 km at mid-latitudes, and 35 km at high latitudes. Additionally, it has ocean in ice-shelf cavities:</desc>
+    </domain>
+
     <!-- ROF (river) grids-->
 
     <domain name="r2">
@@ -2735,6 +2801,8 @@
       <file grid="lnd" mask="EC30to60E2r2">$DIN_LOC_ROOT/share/domains/domain.lnd.r05_EC30to60E2r2.201005.nc</file>
       <file grid="atm" mask="WC14to60E2r3">$DIN_LOC_ROOT/share/domains/domain.lnd.r05_WC14to60E2r3.200929.nc</file>
       <file grid="lnd" mask="WC14to60E2r3">$DIN_LOC_ROOT/share/domains/domain.lnd.r05_WC14to60E2r3.200929.nc</file>
+      <file grid="atm" mask="ECwISC30to60E3r2">$DIN_LOC_ROOT/share/domains/domain.lnd.r05_ECwISC30to60E3r2.231018.nc</file>
+      <file grid="lnd" mask="ECwISC30to60E3r2">$DIN_LOC_ROOT/share/domains/domain.lnd.r05_ECwISC30to60E3r2.231018.nc</file>
       <file grid="lnd" mask="gx1v6">$DIN_LOC_ROOT/share/domains/domain.lnd.r05_gx1v6.191014.nc</file>
       <desc>r05 is 1/2 degree river routing grid:</desc>
     </domain>
@@ -3189,6 +3257,14 @@
       <map name="OCN2ATM_SMAPNAME">cpl/gridmaps/ECwISC30to60E2r1/map_ECwISC30to60E2r1-nomask_to_ne30pg2_mono.201006.nc</map>
     </gridmap>
 
+    <gridmap atm_grid="ne30np4.pg2" ocn_grid="ECwISC30to60E3r2">
+      <map name="ATM2OCN_FMAPNAME">cpl/gridmaps/ne30pg2/map_ne30pg2_to_ECwISC30to60E3r2_traave.20231018.nc</map>
+      <map name="ATM2OCN_VMAPNAME">cpl/gridmaps/ne30pg2/map_ne30pg2_to_ECwISC30to60E3r2_trintbilin.20231018.nc</map>
+      <map name="ATM2OCN_SMAPNAME">cpl/gridmaps/ne30pg2/map_ne30pg2_to_ECwISC30to60E3r2-nomask_trintbilin.20231018.nc</map>
+      <map name="OCN2ATM_FMAPNAME">cpl/gridmaps/ECwISC30to60E3r2/map_ECwISC30to60E3r2_to_ne30pg2_traave.20231018.nc</map>
+      <map name="OCN2ATM_SMAPNAME">cpl/gridmaps/ECwISC30to60E3r2/map_ECwISC30to60E3r2_to_ne30pg2_traave.20231018.nc</map>
+    </gridmap>
+
     <gridmap atm_grid="ne30np4.pg3" ocn_grid="oEC60to30v3">
       <map name="ATM2OCN_FMAPNAME">cpl/gridmaps/ne30pg3/map_ne30pg3_to_oEC60to30v3_mono.200331.nc</map>
       <map name="ATM2OCN_VMAPNAME">cpl/gridmaps/ne30pg3/map_ne30pg3_to_oEC60to30v3_bilin.200331.nc</map>
@@ -3402,6 +3478,14 @@
       <map name="OCN2ATM_SMAPNAME">cpl/gridmaps/EC30to60E2r2/map_EC30to60E2r2_to_ne120pg2_mono.210311.nc</map>
     </gridmap>
 
+    <gridmap atm_grid="ne120np4.pg2" ocn_grid="ECwISC30to60E3r2">
+      <map name="ATM2OCN_FMAPNAME">cpl/gridmaps/ne120pg2/map_ne120pg2_to_ECwISC30to60E3r2_traave.20231018.nc</map>
+      <map name="ATM2OCN_VMAPNAME">cpl/gridmaps/ne120pg2/map_ne120pg2_to_ECwISC30to60E3r2_trintbilin.20231018.nc</map>
+      <map name="ATM2OCN_SMAPNAME">cpl/gridmaps/ne120pg2/map_ne120pg2_to_ECwISC30to60E3r2-nomask_trintbilin.20231018.nc</map>
+      <map name="OCN2ATM_FMAPNAME">cpl/gridmaps/ECwISC30to60E3r2/map_ECwISC30to60E3r2_to_ne120pg2_traave.20231018.nc</map>
+      <map name="OCN2ATM_SMAPNAME">cpl/gridmaps/ECwISC30to60E3r2/map_ECwISC30to60E3r2_to_ne120pg2_traave.20231018.nc</map>
+    </gridmap>
+
     <gridmap atm_grid="ne120np4.pg2" lnd_grid="r05">
       <map name="ATM2LND_FMAPNAME">cpl/gridmaps/ne120pg2/map_ne120pg2_to_r05_mono.200331.nc</map>
       <map name="ATM2LND_SMAPNAME">cpl/gridmaps/ne120pg2/map_ne120pg2_to_r05_bilin.200331.nc</map>
@@ -3483,7 +3567,7 @@
       <map name="OCN2ATM_FMAPNAME">cpl/gridmaps/ne256pg2/map_oRRS18to6v3_to_ne256pg2_nco.200212.nc</map>
       <map name="OCN2ATM_SMAPNAME">cpl/gridmaps/ne256pg2/map_oRRS18to6v3_to_ne256pg2_nco.200212.nc</map>
     </gridmap>
-    
+
     <gridmap atm_grid="ne256np4.pg2" lnd_grid="r0125">
       <!-- 13km atm /  13km land, so use bilin for state -->
       <map name="ATM2LND_FMAPNAME">cpl/gridmaps/ne256pg2/map_ne256pg2_to_r0125_mono.200212.nc</map>
@@ -3892,6 +3976,14 @@
       <map name="OCN2ATM_SMAPNAME">cpl/gridmaps/ECwISC30to60E2r1/map_ECwISC30to60E2r1_to_T62_aave.201006.nc</map>
     </gridmap>
 
+    <gridmap atm_grid="T62" ocn_grid="ECwISC30to60E3r2">
+      <map name="ATM2OCN_FMAPNAME">cpl/gridmaps/T62/map_T62_to_ECwISC30to60E3r2_traave.20231018.nc</map>
+      <map name="ATM2OCN_SMAPNAME">cpl/gridmaps/T62/map_T62_to_ECwISC30to60E3r2-nomask_trintbilin.20231018.nc</map>
+      <map name="ATM2OCN_VMAPNAME">cpl/gridmaps/T62/map_T62_to_ECwISC30to60E3r2_patch.20231018.nc</map>
+      <map name="OCN2ATM_FMAPNAME">cpl/gridmaps/ECwISC30to60E3r2/map_ECwISC30to60E3r2_to_T62_traave.20231018.nc</map>
+      <map name="OCN2ATM_SMAPNAME">cpl/gridmaps/ECwISC30to60E3r2/map_ECwISC30to60E3r2_to_T62_traave.20231018.nc</map>
+    </gridmap>
+
     <gridmap atm_grid="TL319" ocn_grid="oEC60to30v3">
       <map name="ATM2OCN_FMAPNAME">cpl/gridmaps/TL319/map_TL319_to_oEC60to30v3_aave.181203.nc</map>
       <map name="ATM2OCN_SMAPNAME">cpl/gridmaps/TL319/map_TL319_to_oEC60to30v3_bilin.181203.nc</map>
@@ -3980,6 +4072,14 @@
       <map name="OCN2ATM_SMAPNAME">cpl/gridmaps/ECwISC30to60E2r1/map_ECwISC30to60E2r1_to_TL319_aave.201006.nc</map>
     </gridmap>
 
+    <gridmap atm_grid="TL319" ocn_grid="ECwISC30to60E3r2">
+      <map name="ATM2OCN_FMAPNAME">cpl/gridmaps/TL319/map_TL319_to_ECwISC30to60E3r2_traave.20231018.nc</map>
+      <map name="ATM2OCN_SMAPNAME">cpl/gridmaps/TL319/map_TL319_to_ECwISC30to60E3r2-nomask_trintbilin.20231018.nc</map>
+      <map name="ATM2OCN_VMAPNAME">cpl/gridmaps/TL319/map_TL319_to_ECwISC30to60E3r2_patch.20231018.nc</map>
+      <map name="OCN2ATM_FMAPNAME">cpl/gridmaps/ECwISC30to60E3r2/map_ECwISC30to60E3r2_to_TL319_traave.20231018.nc</map>
+      <map name="OCN2ATM_SMAPNAME">cpl/gridmaps/ECwISC30to60E3r2/map_ECwISC30to60E3r2_to_TL319_traave.20231018.nc</map>
+    </gridmap>
+
     <gridmap atm_grid="TL319" ocn_grid="oRRS18to6v3">
       <map name="ATM2OCN_FMAPNAME">cpl/gridmaps/TL319/map_TL319_to_oRRS18to6v3_aave.220124.nc</map>
       <map name="ATM2OCN_SMAPNAME">cpl/gridmaps/TL319/map_TL319_to_oRRS18to6v3_bilin.220124.nc</map>
@@ -4435,6 +4535,11 @@
       <map name="ROF2OCN_LIQ_RMAPNAME">cpl/cpl6/map_rx1_to_ECwISC30to60E2r1_smoothed.r150e300.201006.nc</map>
     </gridmap>
 
+    <gridmap ocn_grid="ECwISC30to60E3r2" rof_grid="rx1">
+      <map name="ROF2OCN_ICE_RMAPNAME">cpl/cpl6/map_rx1_to_ECwISC30to60E3r2_smoothed.r150e300.230901.nc</map>
+      <map name="ROF2OCN_LIQ_RMAPNAME">cpl/cpl6/map_rx1_to_ECwISC30to60E3r2_smoothed.r150e300.230901.nc</map>
+    </gridmap>
+
     <gridmap ocn_grid="oEC60to30v3" rof_grid="JRA025">
       <map name="ROF2OCN_ICE_RMAPNAME">cpl/cpl6/map_JRA025_to_oEC60to30v3_smoothed.r150e300.181204.nc</map>
       <map name="ROF2OCN_LIQ_RMAPNAME">cpl/cpl6/map_JRA025_to_oEC60to30v3_smoothed.r150e300.181204.nc</map>
@@ -4490,6 +4595,11 @@
       <map name="ROF2OCN_LIQ_RMAPNAME">cpl/cpl6/map_JRA025_to_ECwISC30to60E2r1_smoothed.r150e300.201006.nc</map>
     </gridmap>
 
+    <gridmap ocn_grid="ECwISC30to60E3r2" rof_grid="JRA025">
+      <map name="ROF2OCN_ICE_RMAPNAME">cpl/cpl6/map_JRA025_to_ECwISC30to60E3r2_smoothed.r150e300.230901.nc</map>
+      <map name="ROF2OCN_LIQ_RMAPNAME">cpl/cpl6/map_JRA025_to_ECwISC30to60E3r2_smoothed.r150e300.230901.nc</map>
+    </gridmap>
+
     <gridmap ocn_grid="oRRS18to6v3" rof_grid="JRA025">
       <map name="ROF2OCN_ICE_RMAPNAME">cpl/cpl6/map_JRA025_to_oRRS18to6v3_smoothed.r50e100.220124.nc</map>
       <map name="ROF2OCN_LIQ_RMAPNAME">cpl/cpl6/map_JRA025_to_oRRS18to6v3_smoothed.r50e100.220124.nc</map>
@@ -4570,6 +4680,11 @@
       <map name="ROF2OCN_LIQ_RMAPNAME">cpl/cpl6/map_r05_to_ECwISC30to60E2r1_smoothed.r150e300.201006.nc</map>
     </gridmap>
 
+    <gridmap ocn_grid="ECwISC30to60E3r2" rof_grid="r05">
+      <map name="ROF2OCN_ICE_RMAPNAME">cpl/cpl6/map_r05_to_ECwISC30to60E3r2_smoothed.r150e300.230901.nc</map>
+      <map name="ROF2OCN_LIQ_RMAPNAME">cpl/cpl6/map_r05_to_ECwISC30to60E3r2_smoothed.r150e300.230901.nc</map>
+    </gridmap>
+
     <gridmap ocn_grid="WC14to60E2r3" rof_grid="r0125">
       <map name="ROF2OCN_ICE_RMAPNAME">cpl/cpl6/map_r0125_to_WC14to60E2r3_smoothed.r150e300.200929.nc</map>
       <map name="ROF2OCN_LIQ_RMAPNAME">cpl/cpl6/map_r0125_to_WC14to60E2r3_smoothed.r150e300.200929.nc</map>
diff --git a/components/elm/bld/namelist_files/namelist_definition.xml b/components/elm/bld/namelist_files/namelist_definition.xml
index a113076e22df..fc563e9a3dd3 100644
--- a/components/elm/bld/namelist_files/namelist_definition.xml
+++ b/components/elm/bld/namelist_files/namelist_definition.xml
@@ -298,7 +298,7 @@ Toggle to turn on the FATES
 </entry>
 
 <entry id="fates_spitfire_mode" type="integer" category="physics"
-        group="elm_inparm" valid_values="0,1,2,3,4,5", value="0" >
+        group="elm_inparm" valid_values="0,1,2,3,4,5" value="0" >
 Turn on spitfire module to simulate fire by setting fates_spitfire_mode > 0.
 Allowed values are:
  0 : Simulations of fire are off
@@ -340,7 +340,7 @@ Toggle to turn on plant hydraulics (only relevant if FATES is on).
 </entry>
 
 <entry id="use_fates_tree_damage" type="logical" category="physics"
-        group="elm_inparm" valid_values="" value=".false."> 
+        group="elm_inparm" valid_values="" value=".false.">
 Toggle to turn on the tree damage module in FATES
 (Only relevant if FATES is on)
 </entry>
@@ -1022,7 +1022,7 @@ by getco2_historical.ncl
 <!--                                                   -->
 <!-- files needed for tools/ncl_scripts                -->
 <!--                                                   -->
-<entry id="faerdep" type="char*256"  category="tools" 
+<entry id="faerdep" type="char*256"  category="tools"
        input_pathname="abs" group="elmexp" valid_values="" >
 Aerosol deposition file name (only used for aerdepregrid.ncl)
 </entry>
@@ -1309,8 +1309,8 @@ Representative concentration pathway for future scenarios [radiative forcing at
 </entry>
 
 <entry id="mask" type="char*20" category="default_settings"
-       group="default_settings"  
-       valid_values="USGS,gx3v7,gx1v6,navy,test,tx0.1v2,tx1v1,T62,TL319,cruncep,oEC60to30v3,oEC60to30v3wLI,ECwISC30to60E1r2,EC30to60E2r2,WC14to60E2r3,WCAtl12to45E2r4,SOwISC12to60E2r4,ECwISC30to60E2r1,oRRS18to6,oRRS18to6v3,oRRS15to5,oARRM60to10,oARRM60to6,ARRM10to60E2r1,oQU480,oQU240,oQU240wLI,oQU120,oRRS30to10v3,oRRS30to10v3wLI,360x720cru,NLDASww3a,NLDAS,tx0.1v2,ICOS10">
+       group="default_settings"
+       valid_values="USGS,gx3v7,gx1v6,navy,test,tx0.1v2,tx1v1,T62,TL319,cruncep,oEC60to30v3,oEC60to30v3wLI,ECwISC30to60E1r2,EC30to60E2r2,WC14to60E2r3,WCAtl12to45E2r4,SOwISC12to60E2r4,ECwISC30to60E2r1,oRRS18to6,oRRS18to6v3,oRRS15to5,oARRM60to10,oARRM60to6,ARRM10to60E2r1,oQU480,oQU240,oQU240wLI,oQU120,oRRS30to10v3,oRRS30to10v3wLI,360x720cru,NLDASww3a,NLDAS,tx0.1v2,ICOS10,ECwISC30to60E3r2">
 Land mask description
 </entry>
 
@@ -1823,6 +1823,7 @@ Type of saturation function used in VSFM.
 <entry id="vsfm_use_dynamic_linesearch"  type="logical" category="default_settings"
        group="elm_inparm" valid_values="">
 Runtime flag to dynamically modify PETSc SNES linesearch option when VSFM fails to converge before cutting the timestep.
+</entry>
 
 <entry id="vsfm_lateral_model_type" type="char*32" category="elm_physics"
        group="elm_inparm"
@@ -1854,13 +1855,13 @@ Runtime flag to turn on/off PETSc based thermal model.
 <entry id="use_var_soil_thick" type="logical" category="default_settings"
         group="elm_inparm" valid_values="">
 Runtime flag to turn on/off variable soil thickness.
-</entry
+</entry>
 
 <!-- ======================================================================================== -->
 <!-- Namelist options for lake water storage                                                  -->
 <!-- ======================================================================================== -->
 
-<entry id="use_lake_wat_storage" type="logical" category="default_settings" 
+<entry id="use_lake_wat_storage" type="logical" category="default_settings"
         group="elm_inparm" valid_values="">
 Runtime flag to turn on/off lake water storage.
 </entry>
@@ -1869,21 +1870,21 @@ Runtime flag to turn on/off lake water storage.
 <!-- Namelist options for downscaling from grid to topounit                                    -->
 <!-- ========================================================================================  -->
 
-<entry id="use_atm_downscaling_to_topunit" 
-       type="logical" 
+<entry id="use_atm_downscaling_to_topunit"
+       type="logical"
        category="physics"
        group="elm_inparm"
-       valid_values=".true.,.false." 
+       valid_values=".true.,.false."
        value=".false.">
 Runtime flag to turn on/off downscaling of atmosphric forcing from grid to topounit.
 </entry>
-<entry id="precip_downscaling_method" 
-       type="char*32" 
+<entry id="precip_downscaling_method"
+       type="char*32"
        category="physics"
-       group="elm_inparm"       
-       valid_values="ERMM,FNM" 
+       group="elm_inparm"
+       valid_values="ERMM,FNM"
        value="ERMM" >
-Flag to switch between ERMM (Elevation Range with Maximum Elevation Method) and FNM (Froude Number Method) precipitation downscaling methods. 
+Flag to switch between ERMM (Elevation Range with Maximum Elevation Method) and FNM (Froude Number Method) precipitation downscaling methods.
 </entry>
 
 <!-- ========================================================================================  -->
@@ -2010,14 +2011,14 @@ Type of snow grain shape
 
 <entry id="snicar_atm_type" type="char*256" category="elm_physics"
        group="elm_inparm" valid_values="default,mid-latitude_winter,mid-latitude_summer,sub-Arctic_winter,sub-Arctic_summer,summit_Greenland,high_mountain">
-Atmospheric types: 'default' represents the default mid-latitude winter type 
-without considering SZA dependenece of direct irradiance, and the other types 
+Atmospheric types: 'default' represents the default mid-latitude winter type
+without considering SZA dependenece of direct irradiance, and the other types
 explain the SZA dependence of direct irradiance.
 </entry>
 
 <entry id="use_dust_snow_internal_mixing" type="logical" category="elm_physics"
        group="elm_inparm" valid_values="" value=".false.">
-Toggle to turn on the internal mixing of dust-snow. 
+Toggle to turn on the internal mixing of dust-snow.
 </entry>
 
 <!-- ========================================================================================  -->
diff --git a/components/mpas-ocean/bld/namelist_files/namelist_defaults_mpaso.xml b/components/mpas-ocean/bld/namelist_files/namelist_defaults_mpaso.xml
index 08964af1cff9..f05e111ccd40 100644
--- a/components/mpas-ocean/bld/namelist_files/namelist_defaults_mpaso.xml
+++ b/components/mpas-ocean/bld/namelist_files/namelist_defaults_mpaso.xml
@@ -48,6 +48,7 @@
 <config_dt ocn_grid="WCAtl12to45E2r4">'00:10:00'</config_dt>
 <config_dt ocn_grid="SOwISC12to60E2r4">'00:10:00'</config_dt>
 <config_dt ocn_grid="ECwISC30to60E2r1">'00:30:00'</config_dt>
+<config_dt ocn_grid="ECwISC30to60E3r2">'00:30:00'</config_dt>
 <config_time_integrator>'split_explicit'</config_time_integrator>
 <config_number_of_time_levels>2</config_number_of_time_levels>
 
@@ -71,6 +72,7 @@
 <config_hmix_scaleWithMesh ocn_grid="WCAtl12to45E2r4">.true.</config_hmix_scaleWithMesh>
 <config_hmix_scaleWithMesh ocn_grid="SOwISC12to60E2r4">.true.</config_hmix_scaleWithMesh>
 <config_hmix_scaleWithMesh ocn_grid="ECwISC30to60E2r1">.true.</config_hmix_scaleWithMesh>
+<config_hmix_scaleWithMesh ocn_grid="ECwISC30to60E3r2">.true.</config_hmix_scaleWithMesh>
 <config_maxMeshDensity>-1.0</config_maxMeshDensity>
 <config_hmix_use_ref_cell_width>.false.</config_hmix_use_ref_cell_width>
 <config_hmix_ref_cell_width>30.0e3</config_hmix_ref_cell_width>
@@ -86,6 +88,7 @@
 <config_use_mom_del2 ocn_grid="WCAtl12to45E2r4">.true.</config_use_mom_del2>
 <config_use_mom_del2 ocn_grid="SOwISC12to60E2r4">.true.</config_use_mom_del2>
 <config_use_mom_del2 ocn_grid="ECwISC30to60E2r1">.true.</config_use_mom_del2>
+<config_use_mom_del2 ocn_grid="ECwISC30to60E3r2">.true.</config_use_mom_del2>
 <config_mom_del2>10.0</config_mom_del2>
 <config_mom_del2 ocn_grid="oEC60to30v3">1000.0</config_mom_del2>
 <config_mom_del2 ocn_grid="oEC60to30v3wLI">1000.0</config_mom_del2>
@@ -95,6 +98,7 @@
 <config_mom_del2 ocn_grid="WCAtl12to45E2r4">462.0</config_mom_del2>
 <config_mom_del2 ocn_grid="SOwISC12to60E2r4">462.0</config_mom_del2>
 <config_mom_del2 ocn_grid="ECwISC30to60E2r1">1000.0</config_mom_del2>
+<config_mom_del2 ocn_grid="ECwISC30to60E3r2">1000.0</config_mom_del2>
 <config_use_tracer_del2>.false.</config_use_tracer_del2>
 <config_tracer_del2>10.0</config_tracer_del2>
 
@@ -119,6 +123,7 @@
 <config_mom_del4 ocn_grid="WCAtl12to45E2r4">1.18e10</config_mom_del4>
 <config_mom_del4 ocn_grid="SOwISC12to60E2r4">1.18e10</config_mom_del4>
 <config_mom_del4 ocn_grid="ECwISC30to60E2r1">1.2e11</config_mom_del4>
+<config_mom_del4 ocn_grid="ECwISC30to60E3r2">1.2e11</config_mom_del4>
 <config_mom_del4_div_factor>1.0</config_mom_del4_div_factor>
 <config_use_tracer_del4>.false.</config_use_tracer_del4>
 <config_tracer_del4>0.0</config_tracer_del4>
@@ -149,6 +154,8 @@
 <config_Redi_horizontal_taper>'ramp'</config_Redi_horizontal_taper>
 <config_Redi_horizontal_taper ocn_grid="SOwISC12to60E2r4">'RossbyRadius'</config_Redi_horizontal_taper>
 <config_Redi_horizontal_taper ocn_grid="ECwISC30to60E2r1">'RossbyRadius'</config_Redi_horizontal_taper>
+<!-- To do: ramp for WC but RossbyRadius for Cryo -->
+<config_Redi_horizontal_taper ocn_grid="ECwISC30to60E3r2">'ramp'</config_Redi_horizontal_taper>
 <config_Redi_horizontal_ramp_min>20e3</config_Redi_horizontal_ramp_min>
 <config_Redi_horizontal_ramp_min ocn_grid="WCAtl12to45E2r4">30e3</config_Redi_horizontal_ramp_min>
 <config_Redi_horizontal_ramp_max>30e3</config_Redi_horizontal_ramp_max>
@@ -173,6 +180,8 @@
 <config_GM_closure ocn_grid="WCAtl12to45E2r4">'constant'</config_GM_closure>
 <config_GM_closure ocn_grid="SOwISC12to60E2r4">'N2_dependent'</config_GM_closure>
 <config_GM_closure ocn_grid="ECwISC30to60E2r1">'N2_dependent'</config_GM_closure>
+<!-- To do: constant for WC but N2_dependent for Cryo -->
+<config_GM_closure ocn_grid="ECwISC30to60E3r2">'constant'</config_GM_closure>
 <config_GM_constant_kappa>900.0</config_GM_constant_kappa>
 <config_GM_constant_kappa ocn_forcing="datm_forced_restoring" ocn_grid="oEC60to30v3wLI">600.0</config_GM_constant_kappa>
 <config_GM_constant_kappa ocn_forcing="datm_forced_restoring" ocn_grid="ECwISC30to60E1r2">600.0</config_GM_constant_kappa>
@@ -181,6 +190,7 @@
 <config_GM_constant_kappa ocn_forcing="datm_forced_restoring" ocn_grid="WCAtl12to45E2r4">600.0</config_GM_constant_kappa>
 <config_GM_constant_kappa ocn_forcing="datm_forced_restoring" ocn_grid="SOwISC12to60E2r4">600.0</config_GM_constant_kappa>
 <config_GM_constant_kappa ocn_forcing="datm_forced_restoring" ocn_grid="ECwISC30to60E2r1">600.0</config_GM_constant_kappa>
+<config_GM_constant_kappa ocn_forcing="datm_forced_restoring" ocn_grid="ECwISC30to60E3r2">600.0</config_GM_constant_kappa>
 <config_GM_constant_bclModeSpeed>0.3</config_GM_constant_bclModeSpeed>
 <config_GM_minBclModeSpeed_method>'constant'</config_GM_minBclModeSpeed_method>
 <config_GM_spatially_variable_min_kappa>300.0</config_GM_spatially_variable_min_kappa>
@@ -188,6 +198,8 @@
 <config_GM_spatially_variable_baroclinic_mode>3.0</config_GM_spatially_variable_baroclinic_mode>
 <config_GM_spatially_variable_baroclinic_mode ocn_grid="SOwISC12to60E2r4">1.0</config_GM_spatially_variable_baroclinic_mode>
 <config_GM_spatially_variable_baroclinic_mode ocn_grid="ECwISC30to60E2r1">1.0</config_GM_spatially_variable_baroclinic_mode>
+<!-- To do: 3.0 for WC but 1.0 for Cryo? -->
+<config_GM_spatially_variable_baroclinic_mode ocn_grid="ECwISC30to60E3r2">3.0</config_GM_spatially_variable_baroclinic_mode>
 <config_GM_Visbeck_alpha>0.13</config_GM_Visbeck_alpha>
 <config_GM_Visbeck_max_depth>1000.0</config_GM_Visbeck_max_depth>
 <config_GM_EG_riMin>200.0</config_GM_EG_riMin>
@@ -197,6 +209,8 @@
 <config_GM_horizontal_taper>'ramp'</config_GM_horizontal_taper>
 <config_GM_horizontal_taper ocn_grid="SOwISC12to60E2r4">'RossbyRadius'</config_GM_horizontal_taper>
 <config_GM_horizontal_taper ocn_grid="ECwISC30to60E2r1">'RossbyRadius'</config_GM_horizontal_taper>
+<!-- To do: ramp for WC but RossbyRadius for Cryo -->
+<config_GM_horizontal_taper ocn_grid="ECwISC30to60E3r2">'ramp'</config_GM_horizontal_taper>
 <config_GM_horizontal_ramp_min>20e3</config_GM_horizontal_ramp_min>
 <config_GM_horizontal_ramp_min ocn_grid="WCAtl12to45E2r4">30e3</config_GM_horizontal_ramp_min>
 <config_GM_horizontal_ramp_max>30e3</config_GM_horizontal_ramp_max>
@@ -333,6 +347,7 @@
 <config_land_ice_flux_mode ocn_grid="oRRS30to10v3wLI">'pressure_only'</config_land_ice_flux_mode>
 <config_land_ice_flux_mode ocn_grid="SOwISC12to60E2r4">'pressure_only'</config_land_ice_flux_mode>
 <config_land_ice_flux_mode ocn_grid="ECwISC30to60E2r1">'pressure_only'</config_land_ice_flux_mode>
+<config_land_ice_flux_mode ocn_grid="ECwISC30to60E3r2">'pressure_only'</config_land_ice_flux_mode>
 <config_land_ice_flux_formulation>'Jenkins'</config_land_ice_flux_formulation>
 <config_land_ice_flux_useHollandJenkinsAdvDiff>.false.</config_land_ice_flux_useHollandJenkinsAdvDiff>
 <config_land_ice_flux_attenuation_coefficient>10.0</config_land_ice_flux_attenuation_coefficient>
@@ -345,6 +360,7 @@
 <config_land_ice_flux_explicit_topDragCoeff ocn_grid="ECwISC30to60E1r2">4.48e-3</config_land_ice_flux_explicit_topDragCoeff>
 <config_land_ice_flux_explicit_topDragCoeff ocn_grid="SOwISC12to60E2r4">4.48e-3</config_land_ice_flux_explicit_topDragCoeff>
 <config_land_ice_flux_explicit_topDragCoeff ocn_grid="ECwISC30to60E2r1">4.48e-3</config_land_ice_flux_explicit_topDragCoeff>
+<config_land_ice_flux_explicit_topDragCoeff ocn_grid="ECwISC30to60E3r2">4.48e-3</config_land_ice_flux_explicit_topDragCoeff>
 <config_land_ice_flux_ISOMIP_gammaT>1e-4</config_land_ice_flux_ISOMIP_gammaT>
 <config_land_ice_flux_rms_tidal_velocity>5e-2</config_land_ice_flux_rms_tidal_velocity>
 <config_land_ice_flux_jenkins_heat_transfer_coefficient>0.011</config_land_ice_flux_jenkins_heat_transfer_coefficient>
@@ -352,11 +368,13 @@
 <config_land_ice_flux_jenkins_heat_transfer_coefficient ocn_grid="ECwISC30to60E1r2">0.00295</config_land_ice_flux_jenkins_heat_transfer_coefficient>
 <config_land_ice_flux_jenkins_heat_transfer_coefficient ocn_grid="SOwISC12to60E2r4">0.00295</config_land_ice_flux_jenkins_heat_transfer_coefficient>
 <config_land_ice_flux_jenkins_heat_transfer_coefficient ocn_grid="ECwISC30to60E2r1">0.00295</config_land_ice_flux_jenkins_heat_transfer_coefficient>
+<config_land_ice_flux_jenkins_heat_transfer_coefficient ocn_grid="ECwISC30to60E3r2">0.00295</config_land_ice_flux_jenkins_heat_transfer_coefficient>
 <config_land_ice_flux_jenkins_salt_transfer_coefficient>3.1e-4</config_land_ice_flux_jenkins_salt_transfer_coefficient>
 <config_land_ice_flux_jenkins_salt_transfer_coefficient ocn_grid="oEC60to30v3wLI">8.42e-5</config_land_ice_flux_jenkins_salt_transfer_coefficient>
 <config_land_ice_flux_jenkins_salt_transfer_coefficient ocn_grid="ECwISC30to60E1r2">8.42e-5</config_land_ice_flux_jenkins_salt_transfer_coefficient>
 <config_land_ice_flux_jenkins_salt_transfer_coefficient ocn_grid="SOwISC12to60E2r4">8.42e-5</config_land_ice_flux_jenkins_salt_transfer_coefficient>
 <config_land_ice_flux_jenkins_salt_transfer_coefficient ocn_grid="ECwISC30to60E2r1">8.42e-5</config_land_ice_flux_jenkins_salt_transfer_coefficient>
+<config_land_ice_flux_jenkins_salt_transfer_coefficient ocn_grid="ECwISC30to60E3r2">8.42e-5</config_land_ice_flux_jenkins_salt_transfer_coefficient>
 
 <!-- advection -->
 <config_vert_advection_method>'flux-form'</config_vert_advection_method>
@@ -379,6 +397,7 @@
 <config_implicit_top_drag_coeff ocn_grid="ECwISC30to60E1r2">4.48e-3</config_implicit_top_drag_coeff>
 <config_implicit_top_drag_coeff ocn_grid="SOwISC12to60E2r4">4.48e-3</config_implicit_top_drag_coeff>
 <config_implicit_top_drag_coeff ocn_grid="ECwISC30to60E2r1">4.48e-3</config_implicit_top_drag_coeff>
+<config_implicit_top_drag_coeff ocn_grid="ECwISC30to60E3r2">4.48e-3</config_implicit_top_drag_coeff>
 <config_loglaw_bottom_roughness>1.0e-3</config_loglaw_bottom_roughness>
 <config_loglaw_layer_depth_max>10.0</config_loglaw_layer_depth_max>
 <config_loglaw_bottom_drag_min>2.5e-3</config_loglaw_bottom_drag_min>
@@ -456,6 +475,7 @@
 <config_btr_dt ocn_grid="WCAtl12to45E2r4">'0000_00:00:15'</config_btr_dt>
 <config_btr_dt ocn_grid="SOwISC12to60E2r4">'0000_00:00:15'</config_btr_dt>
 <config_btr_dt ocn_grid="ECwISC30to60E2r1">'0000_00:01:00'</config_btr_dt>
+<config_btr_dt ocn_grid="ECwISC30to60E3r2">'0000_00:01:00'</config_btr_dt>
 <config_n_btr_cor_iter>2</config_n_btr_cor_iter>
 <config_vel_correction>.true.</config_vel_correction>
 <config_btr_subcycle_loop_factor>2</config_btr_subcycle_loop_factor>
@@ -496,6 +516,7 @@
 <config_check_ssh_consistency ocn_grid="oRRS30to10v3wLI">.false.</config_check_ssh_consistency>
 <config_check_ssh_consistency ocn_grid="SOwISC12to60E2r4">.false.</config_check_ssh_consistency>
 <config_check_ssh_consistency ocn_grid="ECwISC30to60E2r1">.false.</config_check_ssh_consistency>
+<config_check_ssh_consistency ocn_grid="ECwISC30to60E3r2">.false.</config_check_ssh_consistency>
 <config_filter_btr_mode>.false.</config_filter_btr_mode>
 <config_prescribe_velocity>.false.</config_prescribe_velocity>
 <config_prescribe_thickness>.false.</config_prescribe_thickness>
@@ -1012,6 +1033,7 @@
 <config_AM_mocStreamfunction_enable ocn_grid="WCAtl12to45E2r4">.true.</config_AM_mocStreamfunction_enable>
 <config_AM_mocStreamfunction_enable ocn_grid="SOwISC12to60E2r4">.true.</config_AM_mocStreamfunction_enable>
 <config_AM_mocStreamfunction_enable ocn_grid="ECwISC30to60E2r1">.true.</config_AM_mocStreamfunction_enable>
+<config_AM_mocStreamfunction_enable ocn_grid="ECwISC30to60E3r2">.true.</config_AM_mocStreamfunction_enable>
 <config_AM_mocStreamfunction_compute_interval>'0000-00-00_01:00:00'</config_AM_mocStreamfunction_compute_interval>
 <config_AM_mocStreamfunction_output_stream>'mocStreamfunctionOutput'</config_AM_mocStreamfunction_output_stream>
 <config_AM_mocStreamfunction_compute_on_startup>.true.</config_AM_mocStreamfunction_compute_on_startup>
@@ -1093,14 +1115,17 @@
 <config_AM_conservationCheck_enable>.false.</config_AM_conservationCheck_enable>
 <config_AM_conservationCheck_enable ocn_grid="SOwISC12to60E2r4">.true.</config_AM_conservationCheck_enable>
 <config_AM_conservationCheck_enable ocn_grid="ECwISC30to60E2r1">.true.</config_AM_conservationCheck_enable>
+<config_AM_conservationCheck_enable ocn_grid="ECwISC30to60E3r2">.true.</config_AM_conservationCheck_enable>
 <config_AM_conservationCheck_compute_interval>'dt'</config_AM_conservationCheck_compute_interval>
 <config_AM_conservationCheck_output_stream>'conservationCheckOutput'</config_AM_conservationCheck_output_stream>
 <config_AM_conservationCheck_compute_on_startup>.false.</config_AM_conservationCheck_compute_on_startup>
 <config_AM_conservationCheck_compute_on_startup ocn_grid="SOwISC12to60E2r4">.true.</config_AM_conservationCheck_compute_on_startup>
 <config_AM_conservationCheck_compute_on_startup ocn_grid="ECwISC30to60E2r1">.true.</config_AM_conservationCheck_compute_on_startup>
+<config_AM_conservationCheck_compute_on_startup ocn_grid="ECwISC30to60E3r2">.true.</config_AM_conservationCheck_compute_on_startup>
 <config_AM_conservationCheck_write_on_startup>.false.</config_AM_conservationCheck_write_on_startup>
 <config_AM_conservationCheck_write_on_startup ocn_grid="SOwISC12to60E2r4">.true.</config_AM_conservationCheck_write_on_startup>
 <config_AM_conservationCheck_write_on_startup ocn_grid="ECwISC30to60E2r1">.true.</config_AM_conservationCheck_write_on_startup>
+<config_AM_conservationCheck_write_on_startup ocn_grid="ECwISC30to60E3r2">.true.</config_AM_conservationCheck_write_on_startup>
 <config_AM_conservationCheck_write_to_logfile>.true.</config_AM_conservationCheck_write_to_logfile>
 <config_AM_conservationCheck_restart_stream>'conservationCheckRestart'</config_AM_conservationCheck_restart_stream>
 
diff --git a/components/mpas-ocean/cime_config/buildnml b/components/mpas-ocean/cime_config/buildnml
index 53b4677db640..dbb37d5ec5a8 100755
--- a/components/mpas-ocean/cime_config/buildnml
+++ b/components/mpas-ocean/cime_config/buildnml
@@ -283,6 +283,19 @@ def buildnml(case, caseroot, compname):
         if ocn_ismf == 'data':
             data_ismf_file = 'prescribed_ismf_adusumilli2020.ECwISC30to60E2r1.230429.nc'
 
+    elif ocn_grid == 'ECwISC30to60E3r2':
+        decomp_date = '20230901'
+        decomp_prefix = 'partitions/mpas-o.graph.info.'
+        restoring_file = 'sss.PHC2_monthlyClimatology.ECwISC30to60E3r2.20230901.nc'
+        analysis_mask_file = 'ECwISC30to60E3r2_mocBasinsAndTransects20210623.nc'
+        ic_date = '20230901'
+        ic_prefix = 'mpaso.ECwISC30to60E3r2'
+        if ocn_ic_mode == 'spunup':
+            ic_date = '230914'
+            ic_prefix = 'mpaso.ECwISC30to60E3r2.rstFromG-chrysalis'
+        if ocn_ismf == 'data':
+            data_ismf_file = 'prescribed_ismf_adusumilli2020.ECwISC30to60E3r2.20230901.nc'
+
     #--------------------------------------------------------------------
     # Set OCN_FORCING = datm_forced_restoring if restoring file is available
     #--------------------------------------------------------------------
diff --git a/components/mpas-ocean/cime_config/config_pes.xml b/components/mpas-ocean/cime_config/config_pes.xml
index ff676b33e9f3..eb7c48d2854a 100644
--- a/components/mpas-ocean/cime_config/config_pes.xml
+++ b/components/mpas-ocean/cime_config/config_pes.xml
@@ -401,6 +401,32 @@
       </pes>
     </mach>
   </grid>
+  <grid name="oi%ECwISC30to60E3r1">
+    <mach name="chrysalis">
+      <pes compset="DATM.+MPASO.+SWAV" pesize="any">
+        <comment>mpas-ocean+chrysalis: standard-res, compset=DATM+MPASO, 20 nodes, ~22 SYPD </comment>
+        <MAX_MPITASKS_PER_NODE>64</MAX_MPITASKS_PER_NODE>
+        <ntasks>
+          <ntasks_atm>1280</ntasks_atm>
+          <ntasks_lnd>1280</ntasks_lnd>
+          <ntasks_rof>1280</ntasks_rof>
+          <ntasks_ice>1280</ntasks_ice>
+          <ntasks_ocn>1280</ntasks_ocn>
+          <ntasks_glc>1</ntasks_glc>
+          <ntasks_cpl>1280</ntasks_cpl>
+        </ntasks>
+        <rootpe>
+          <rootpe_atm>0</rootpe_atm>
+          <rootpe_lnd>0</rootpe_lnd>
+          <rootpe_rof>0</rootpe_rof>
+          <rootpe_ice>0</rootpe_ice>
+          <rootpe_ocn>0</rootpe_ocn>
+          <rootpe_glc>0</rootpe_glc>
+          <rootpe_cpl>0</rootpe_cpl>
+        </rootpe>
+      </pes>
+    </mach>
+  </grid>
   <grid name="oi%SOwISC12to60E2r4">
     <mach name="chrysalis">
       <pes compset="DATM.+MPASO.+SWAV" pesize="any">
diff --git a/components/mpas-seaice/bld/namelist_files/namelist_defaults_mpassi.xml b/components/mpas-seaice/bld/namelist_files/namelist_defaults_mpassi.xml
index 1253fb0e1997..d4814c4e317d 100644
--- a/components/mpas-seaice/bld/namelist_files/namelist_defaults_mpassi.xml
+++ b/components/mpas-seaice/bld/namelist_files/namelist_defaults_mpassi.xml
@@ -24,6 +24,7 @@
 <config_dt ice_grid="WCAtl12to45E2r4">1800.0</config_dt>
 <config_dt ice_grid="SOwISC12to60E2r4">1800.0</config_dt>
 <config_dt ice_grid="ECwISC30to60E2r1">1800.0</config_dt>
+<config_dt ice_grid="ECwISC30to60E3r2">1800.0</config_dt>
 <config_calendar_type>'noleap'</config_calendar_type>
 <config_start_time>'2000-01-01_00:00:00'</config_start_time>
 <config_stop_time>'none'</config_stop_time>
@@ -73,6 +74,8 @@
 <config_initial_latitude_north ice_grid="ECwISC30to60E1r2">75.0</config_initial_latitude_north>
 <config_initial_latitude_north ice_grid="SOwISC12to60E2r4">85.0</config_initial_latitude_north>
 <config_initial_latitude_north ice_grid="ECwISC30to60E2r1">75.0</config_initial_latitude_north>
+<!-- To do: 70.0 for WC but 75.0 for Cryo -->
+<config_initial_latitude_north ice_grid="ECwISC30to60E3r2">70.0</config_initial_latitude_north>
 <config_initial_latitude_north ice_grid="ARRM10to60E2r1">75.0</config_initial_latitude_north>
 <config_initial_latitude_north ice_grid="oRRS30to10v3wLI">85.0</config_initial_latitude_north>
 <config_initial_latitude_north ice_grid="oRRS18to6v3">85.0</config_initial_latitude_north>
@@ -81,6 +84,8 @@
 <config_initial_latitude_south ice_grid="ECwISC30to60E1r2">-75.0</config_initial_latitude_south>
 <config_initial_latitude_south ice_grid="SOwISC12to60E2r4">-85.0</config_initial_latitude_south>
 <config_initial_latitude_south ice_grid="ECwISC30to60E2r1">-75.0</config_initial_latitude_south>
+<!-- To do: -60.0 for WC but -75.0 for Cryo -->
+<config_initial_latitude_south ice_grid="ECwISC30to60E3r2">-60.0</config_initial_latitude_south>
 <config_initial_latitude_south ice_grid="ARRM10to60E2r1">-85.0</config_initial_latitude_south>
 <config_initial_latitude_south ice_grid="oRRS30to10v3wLI">-85.0</config_initial_latitude_south>
 <config_initial_latitude_south ice_grid="oRRS18to6v3">-85.0</config_initial_latitude_south>
@@ -140,6 +145,7 @@
 <config_dynamics_subcycle_number ice_grid="WCAtl12to45E2r4">1</config_dynamics_subcycle_number>
 <config_dynamics_subcycle_number ice_grid="SOwISC12to60E2r4">1</config_dynamics_subcycle_number>
 <config_dynamics_subcycle_number ice_grid="ECwISC30to60E2r1">1</config_dynamics_subcycle_number>
+<config_dynamics_subcycle_number ice_grid="ECwISC30to60E3r2">1</config_dynamics_subcycle_number>
 <config_rotate_cartesian_grid>true</config_rotate_cartesian_grid>
 <config_include_metric_terms>true</config_include_metric_terms>
 <config_elastic_subcycle_number>120</config_elastic_subcycle_number>
diff --git a/components/mpas-seaice/cime_config/buildnml b/components/mpas-seaice/cime_config/buildnml
index 401b13b7e2bd..19e353ce065e 100755
--- a/components/mpas-seaice/cime_config/buildnml
+++ b/components/mpas-seaice/cime_config/buildnml
@@ -253,6 +253,16 @@ def buildnml(case, caseroot, compname):
             grid_date = '210414'
             grid_prefix = 'mpassi.ECwISC30to60E2r1.rstFromG-anvil'
 
+    elif ice_grid == 'ECwISC30to60E3r2':
+        grid_date = '20230901'
+        grid_prefix = 'mpassi.ECwISC30to60E3r2'
+        decomp_date = '20230901'
+        decomp_prefix = 'partitions/mpas-seaice.graph.info.'
+        data_iceberg_file = 'Iceberg_Climatology_Merino.ECwISC30to60E3r2.20230901.nc'
+        if ice_ic_mode == 'spunup':
+            grid_date = '230914'
+            grid_prefix = 'mpassi.ECwISC30to60E3r2.rstFromG-chrysalis'
+
     elif ice_grid == 'ICOS10':
         grid_date = '211015'
         grid_prefix = 'seaice.ICOS10'