diff --git a/.gitmodules b/.gitmodules
index 2a0a1f1..df2418f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -2,7 +2,7 @@
   path = MOM6
   url = https://github.com/NCAR/MOM6.git
   fxDONOTUSEurl = https://github.com/NCAR/MOM6.git
-    fxtag = dev/ncar_260624
+    fxtag = dev/ncar_260713
     fxrequired = AlwaysRequired
 
 [submodule "stochastic_physics"]
@@ -16,6 +16,6 @@
   path = externals/MARBL
   url = https://github.com/marbl-ecosys/MARBL.git
   fxDONOTUSEurl = https://github.com/marbl-ecosys/MARBL.git
-    fxtag = marbl0.49.0
+    fxtag = marbl0.50.0
     fxrequired = AlwaysRequired
 
diff --git a/MOM6 b/MOM6
index c37361e..fb10e56 160000
--- a/MOM6
+++ b/MOM6
@@ -1 +1 @@
-Subproject commit c37361ed68c2367c364db1e4d8238aca4e0c6349
+Subproject commit fb10e568e4980bc6a7e8a5c0362c7e51ee90ba27
diff --git a/cime_config/testdefs/testlist_mom.xml b/cime_config/testdefs/testlist_mom.xml
index 22a7f80..dfca75a 100644
--- a/cime_config/testdefs/testlist_mom.xml
+++ b/cime_config/testdefs/testlist_mom.xml
@@ -102,7 +102,7 @@
       <option name="wallclock">01:00:00</option>
     </options>
   </test>
-  <test name="SMS" grid="TL319_t232" compset="G1850ABIOMARBL_JRA">
+  <test name="SMS" grid="TL319_t233" compset="G1850ABIOMARBL_JRA">
     <machines>
       <machine name="derecho" compiler="intel" category="aux_mom_MARBL"/>
     </machines>
@@ -110,7 +110,7 @@
       <option name="wallclock">00:30:00</option>
     </options>
   </test>
-  <test name="SMS" grid="TL319_t232" compset="G1850MARBL_JRA">
+  <test name="SMS" grid="TL319_t233" compset="G1850MARBL_JRA">
     <machines>
       <machine name="derecho" compiler="intel" category="aux_mom"/>
       <machine name="derecho" compiler="intel" category="prealpha"/>
@@ -119,7 +119,7 @@
       <option name="wallclock">00:30:00</option>
     </options>
   </test>
-  <test name="SMS_Ld1_D" grid="TL319_t232" compset="C1850MARBL_JRA">
+  <test name="SMS_Ld1_D" grid="TL319_t233" compset="C1850MARBL_JRA">
     <machines>
       <machine name="derecho" compiler="intel" category="aux_mom"/>
       <machine name="derecho" compiler="intel" category="aux_mom_MARBL"/>
@@ -129,7 +129,7 @@
       <option name="wallclock">00:30:00</option>
     </options>
   </test>
-  <test name="ERS" grid="TL319_t232" compset="G1850MARBL_JRA">
+  <test name="ERS" grid="TL319_t233" compset="G1850MARBL_JRA">
     <machines>
       <machine name="derecho" compiler="intel" category="aux_mom_MARBL"/>
       <machine name="derecho" compiler="intel" category="prebeta"/>
@@ -138,7 +138,7 @@
       <option name="wallclock">00:30:00</option>
     </options>
   </test>
-  <test name="SMS" grid="TL319_t232" compset="C_JRA" testmods="mom/no_marbl">
+  <test name="SMS" grid="TL319_t233" compset="C_JRA" testmods="mom/no_marbl">
     <machines>
       <machine name="derecho" compiler="intel" category="aux_mom_MARBL"/>
     </machines>
diff --git a/externals/MARBL b/externals/MARBL
index b5cf6bd..403f6c5 160000
--- a/externals/MARBL
+++ b/externals/MARBL
@@ -1 +1 @@
-Subproject commit b5cf6bd48640b7d0e7e488da02b81b29e3aaaafa
+Subproject commit 403f6c50bba305d59910031dae33ff0629fb8602
diff --git a/param_templates/MOM_input.yaml b/param_templates/MOM_input.yaml
index 04b15f8..83335d6 100644
--- a/param_templates/MOM_input.yaml
+++ b/param_templates/MOM_input.yaml
@@ -355,29 +355,35 @@ Global:
             for the MARBL tracer package."
         datatype: string
         value:
-            $MARBL_CONFIG == "latest": ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc
-            $MARBL_CONFIG == "latest+4p2z": ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc
-    MARBL_FESEDFLUX_FILE:
+            $RUN_TYPE == "hybrid":
+                = f'./{$RUN_REFCASE}.mom6{$INST_SUFFIX}.r.{$RUN_REFDATE}-{$RUN_REFTOD}.nc'
+            else:
+                $MARBL_CONFIG == "latest": ${DIN_LOC_ROOT}/ocn/mom/grid_indpt/ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc
+                $MARBL_CONFIG == "latest+4p2z": ${DIN_LOC_ROOT}/ocn/mom/grid_indpt/ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc
+    MARBL_TRACERS_IC_FILE_IS_Z:
         description: |
-            "Name of file containing iron sediment flux
-             forcing field for the MARBL tracer package."
-        datatype: string
+            "[Boolean] default = True
+            If true, MARBL_TRACERS_IC_FILE is in depth space, not layer space."
+        datatype: logical
+        units: Boolean
         value:
-            '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS and $OCN_GRID == "tx2_3v2"': fesedflux_2024algo_tx2_3v2.c251229.nc
-    MARBL_FESEDFLUXRED_FILE:
+            $RUN_TYPE == "hybrid": False
+    MARBL_IC_MIN_VAL:
         description: |
-            "Name of file containing iron reducing sediment flux
-             forcing field for the MARBL tracer package."
-        datatype: string
+            "Minimum value of tracer initial conditions
+             (when initializing from Z)"
+        datatype: real
+        units: conc units
         value:
-            '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS and $OCN_GRID == "tx2_3v2"': fesedfluxRed_2024algo_tx2_3v2.c251229.nc
-    MARBL_FEVENTFLUX_FILE:
+            '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS and $TEST': 1e-50
+    MARBL_FE_INTERIOR_SOURCE_FILE:
         description: |
-            "Name of file containing iron sediment flux
-             forcing field for the MARBL tracer package."
+            "Name of file containing iron sediment fluxes and vent
+             flux forcing fields for the MARBL tracer package."
         datatype: string
         value:
-            '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS and $OCN_GRID == "tx2_3v2"': feventflux_5gmol_tx2_3v2.c231205.nc
+            '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS and $OCN_GRID == "tx2_3v2"': fe_sources_sed2024algo_tx2_3v2_20260711.nc
+            '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS and $OCN_GRID == "tx2_3v3"': fe_sources_sed2024algo_vent2026algo_tx2_3v3.c260701.nc
     READ_RIV_FLUXES:
         description: |
             "Use river fluxes provided by RIV_FLUX_FILE."
@@ -392,6 +398,8 @@ Global:
         value:
             '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS and $OCN_GRID == "tx2_3v2" and $ROF_GRID == "JRA025"': riv_nut.gnews_gnm.rJRA025_to_tx2_3v2_nnsm_e333r100_230415.20240202.nc
             '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS and $OCN_GRID == "tx2_3v2" and $ROF_GRID == "r05"': riv_nut.gnews_gnm.r05_to_tx2_3v2_nnsm_e250r250_230914.20240202.nc
+            '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS and $OCN_GRID == "tx2_3v3" and $ROF_GRID == "JRA025"': riv_nut.gnews_gnm.rJRA025_to_tx2_3v3_nnsm_e100r100_260306.20260424.nc
+            '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS and $OCN_GRID == "tx2_3v3" and $ROF_GRID == "r05"': riv_nut.gnews_gnm.r05_to_tx2_3v3_nnsm_e100r100_260306.20260424.nc
     MARBL_D14C_FILE_1:
         description: |
             "Name of file containing D14C forcing from 30 N to 90 N."
diff --git a/param_templates/input_data_list.yaml b/param_templates/input_data_list.yaml
index 2533dd1..7213e16 100644
--- a/param_templates/input_data_list.yaml
+++ b/param_templates/input_data_list.yaml
@@ -74,21 +74,18 @@ mom.input_data_list:
     DIAG_COORD_DEF_RHO2:
         $OCN_GRID in ["tx2_3v2", "tx2_3v3"]:  "${INPUTDIR}/ocean_rho2_190917.nc"
     MARBL_TRACERS_IC_FILE:
-        $MARBL_CONFIG == "latest": "${INPUTDIR}/ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc"
-        $MARBL_CONFIG == "latest+4p2z": "${INPUTDIR}/ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc"
-    MARBL_FESEDFLUX_FILE:
+        $MARBL_CONFIG == "latest": "${DIN_LOC_ROOT}/ocn/mom/grid_indpt/ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc"
+        $MARBL_CONFIG == "latest+4p2z": "${DIN_LOC_ROOT}/ocn/mom/grid_indpt/ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc"
+    MARBL_FE_INTERIOR_SOURCE_FILE:
         '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS':
-            $OCN_GRID == "tx2_3v2": "${INPUTDIR}/fesedflux_2024algo_tx2_3v2.c251229.nc"
-    MARBL_FESEDFLUXRED_FILE:
-        '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS':
-            $OCN_GRID == "tx2_3v2": "${INPUTDIR}/fesedfluxRed_2024algo_tx2_3v2.c251229.nc"
-    MARBL_FEVENTFLUX_FILE:
-        '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS':
-            $OCN_GRID == "tx2_3v2": "${INPUTDIR}/feventflux_5gmol_tx2_3v2.c231205.nc"
+            $OCN_GRID == "tx2_3v2": "${INPUTDIR}/fe_sources_sed2024algo_tx2_3v2_20260711.nc"
+            $OCN_GRID == "tx2_3v3": "${INPUTDIR}/fe_sources_sed2024algo_vent2026algo_tx2_3v3.c260701.nc"
     RIV_FLUX_FILE:
         '"BASE_BIO_ON=TRUE" in $MARBL_TRACER_OPTS':
-            '$ROF_GRID == "JRA025" and $OCN_GRID == "tx2_3v2"': "${INPUTDIR}/riv_nut.gnews_gnm.rJRA025_to_tx2_3v2_nnsm_e333r100_230415.20240202.nc"
-            '$ROF_GRID == "r05" and $OCN_GRID == "tx2_3v2"': "${INPUTDIR}/riv_nut.gnews_gnm.r05_to_tx2_3v2_nnsm_e250r250_230914.20240202.nc"
+            '$OCN_GRID == "tx2_3v2" and $ROF_GRID == "JRA025"': "${INPUTDIR}/riv_nut.gnews_gnm.rJRA025_to_tx2_3v2_nnsm_e333r100_230415.20240202.nc"
+            '$OCN_GRID == "tx2_3v2" and $ROF_GRID == "r05"': "${INPUTDIR}/riv_nut.gnews_gnm.r05_to_tx2_3v2_nnsm_e250r250_230914.20240202.nc"
+            '$OCN_GRID == "tx2_3v3" and $ROF_GRID == "JRA025"': "${INPUTDIR}/riv_nut.gnews_gnm.rJRA025_to_tx2_3v3_nnsm_e100r100_260306.20260424.nc"
+            '$OCN_GRID == "tx2_3v3" and $ROF_GRID == "r05"': "${INPUTDIR}/riv_nut.gnews_gnm.r05_to_tx2_3v3_nnsm_e100r100_260306.20260424.nc"
     MARBL_D14C_FILE_1:
         '"ABIO_DIC_ON=TRUE" in $MARBL_TRACER_OPTS': "${DIN_LOC_ROOT}/ocn/mom/grid_indpt/atm_delta_C14_CMIP6_sector1_global_1850-2015_yearly_v2.0_c240202.nc"
     MARBL_D14C_FILE_2:
diff --git a/param_templates/json/MOM_input.json b/param_templates/json/MOM_input.json
index fb2e128..dba1d1b 100644
--- a/param_templates/json/MOM_input.json
+++ b/param_templates/json/MOM_input.json
@@ -258,29 +258,35 @@
          "description": "\"Name of file containing initial conditions\nfor the MARBL tracer package.\"\n",
          "datatype": "string",
          "value": {
-            "$MARBL_CONFIG == \"latest\"": "ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc",
-            "$MARBL_CONFIG == \"latest+4p2z\"": "ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc"
+            "$RUN_TYPE == \"hybrid\"": "= f'./{$RUN_REFCASE}.mom6{$INST_SUFFIX}.r.{$RUN_REFDATE}-{$RUN_REFTOD}.nc'",
+            "else": {
+               "$MARBL_CONFIG == \"latest\"": "${DIN_LOC_ROOT}/ocn/mom/grid_indpt/ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc",
+               "$MARBL_CONFIG == \"latest+4p2z\"": "${DIN_LOC_ROOT}/ocn/mom/grid_indpt/ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc"
+            }
          }
       },
-      "MARBL_FESEDFLUX_FILE": {
-         "description": "\"Name of file containing iron sediment flux\n forcing field for the MARBL tracer package.\"\n",
-         "datatype": "string",
+      "MARBL_TRACERS_IC_FILE_IS_Z": {
+         "description": "\"[Boolean] default = True\nIf true, MARBL_TRACERS_IC_FILE is in depth space, not layer space.\"\n",
+         "datatype": "logical",
+         "units": "Boolean",
          "value": {
-            "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS and $OCN_GRID == \"tx2_3v2\"": "fesedflux_2024algo_tx2_3v2.c251229.nc"
+            "$RUN_TYPE == \"hybrid\"": false
          }
       },
-      "MARBL_FESEDFLUXRED_FILE": {
-         "description": "\"Name of file containing iron reducing sediment flux\n forcing field for the MARBL tracer package.\"\n",
-         "datatype": "string",
+      "MARBL_IC_MIN_VAL": {
+         "description": "\"Minimum value of tracer initial conditions\n (when initializing from Z)\"\n",
+         "datatype": "real",
+         "units": "conc units",
          "value": {
-            "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS and $OCN_GRID == \"tx2_3v2\"": "fesedfluxRed_2024algo_tx2_3v2.c251229.nc"
+            "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS and $TEST": "1e-50"
          }
       },
-      "MARBL_FEVENTFLUX_FILE": {
-         "description": "\"Name of file containing iron sediment flux\n forcing field for the MARBL tracer package.\"\n",
+      "MARBL_FE_INTERIOR_SOURCE_FILE": {
+         "description": "\"Name of file containing iron sediment fluxes and vent\n flux forcing fields for the MARBL tracer package.\"\n",
          "datatype": "string",
          "value": {
-            "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS and $OCN_GRID == \"tx2_3v2\"": "feventflux_5gmol_tx2_3v2.c231205.nc"
+            "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS and $OCN_GRID == \"tx2_3v2\"": "fe_sources_sed2024algo_tx2_3v2_20260711.nc",
+            "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS and $OCN_GRID == \"tx2_3v3\"": "fe_sources_sed2024algo_vent2026algo_tx2_3v3.c260701.nc"
          }
       },
       "READ_RIV_FLUXES": {
@@ -295,7 +301,9 @@
          "datatype": "string",
          "value": {
             "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS and $OCN_GRID == \"tx2_3v2\" and $ROF_GRID == \"JRA025\"": "riv_nut.gnews_gnm.rJRA025_to_tx2_3v2_nnsm_e333r100_230415.20240202.nc",
-            "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS and $OCN_GRID == \"tx2_3v2\" and $ROF_GRID == \"r05\"": "riv_nut.gnews_gnm.r05_to_tx2_3v2_nnsm_e250r250_230914.20240202.nc"
+            "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS and $OCN_GRID == \"tx2_3v2\" and $ROF_GRID == \"r05\"": "riv_nut.gnews_gnm.r05_to_tx2_3v2_nnsm_e250r250_230914.20240202.nc",
+            "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS and $OCN_GRID == \"tx2_3v3\" and $ROF_GRID == \"JRA025\"": "riv_nut.gnews_gnm.rJRA025_to_tx2_3v3_nnsm_e100r100_260306.20260424.nc",
+            "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS and $OCN_GRID == \"tx2_3v3\" and $ROF_GRID == \"r05\"": "riv_nut.gnews_gnm.r05_to_tx2_3v3_nnsm_e100r100_260306.20260424.nc"
          }
       },
       "MARBL_D14C_FILE_1": {
diff --git a/param_templates/json/input_data_list.json b/param_templates/json/input_data_list.json
index 2906bb5..c18a818 100644
--- a/param_templates/json/input_data_list.json
+++ b/param_templates/json/input_data_list.json
@@ -91,28 +91,21 @@
          "$OCN_GRID in [\"tx2_3v2\", \"tx2_3v3\"]": "${INPUTDIR}/ocean_rho2_190917.nc"
       },
       "MARBL_TRACERS_IC_FILE": {
-         "$MARBL_CONFIG == \"latest\"": "${INPUTDIR}/ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc",
-         "$MARBL_CONFIG == \"latest+4p2z\"": "${INPUTDIR}/ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc"
+         "$MARBL_CONFIG == \"latest\"": "${DIN_LOC_ROOT}/ocn/mom/grid_indpt/ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc",
+         "$MARBL_CONFIG == \"latest+4p2z\"": "${DIN_LOC_ROOT}/ocn/mom/grid_indpt/ecosys_jan_IC_omip_latlon_1x1_180W_c250613.nc"
       },
-      "MARBL_FESEDFLUX_FILE": {
+      "MARBL_FE_INTERIOR_SOURCE_FILE": {
          "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS": {
-            "$OCN_GRID == \"tx2_3v2\"": "${INPUTDIR}/fesedflux_2024algo_tx2_3v2.c251229.nc"
-         }
-      },
-      "MARBL_FESEDFLUXRED_FILE": {
-         "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS": {
-            "$OCN_GRID == \"tx2_3v2\"": "${INPUTDIR}/fesedfluxRed_2024algo_tx2_3v2.c251229.nc"
-         }
-      },
-      "MARBL_FEVENTFLUX_FILE": {
-         "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS": {
-            "$OCN_GRID == \"tx2_3v2\"": "${INPUTDIR}/feventflux_5gmol_tx2_3v2.c231205.nc"
+            "$OCN_GRID == \"tx2_3v2\"": "${INPUTDIR}/fe_sources_sed2024algo_tx2_3v2_20260711.nc",
+            "$OCN_GRID == \"tx2_3v3\"": "${INPUTDIR}/fe_sources_sed2024algo_vent2026algo_tx2_3v3.c260701.nc"
          }
       },
       "RIV_FLUX_FILE": {
          "\"BASE_BIO_ON=TRUE\" in $MARBL_TRACER_OPTS": {
-            "$ROF_GRID == \"JRA025\" and $OCN_GRID == \"tx2_3v2\"": "${INPUTDIR}/riv_nut.gnews_gnm.rJRA025_to_tx2_3v2_nnsm_e333r100_230415.20240202.nc",
-            "$ROF_GRID == \"r05\" and $OCN_GRID == \"tx2_3v2\"": "${INPUTDIR}/riv_nut.gnews_gnm.r05_to_tx2_3v2_nnsm_e250r250_230914.20240202.nc"
+            "$OCN_GRID == \"tx2_3v2\" and $ROF_GRID == \"JRA025\"": "${INPUTDIR}/riv_nut.gnews_gnm.rJRA025_to_tx2_3v2_nnsm_e333r100_230415.20240202.nc",
+            "$OCN_GRID == \"tx2_3v2\" and $ROF_GRID == \"r05\"": "${INPUTDIR}/riv_nut.gnews_gnm.r05_to_tx2_3v2_nnsm_e250r250_230914.20240202.nc",
+            "$OCN_GRID == \"tx2_3v3\" and $ROF_GRID == \"JRA025\"": "${INPUTDIR}/riv_nut.gnews_gnm.rJRA025_to_tx2_3v3_nnsm_e100r100_260306.20260424.nc",
+            "$OCN_GRID == \"tx2_3v3\" and $ROF_GRID == \"r05\"": "${INPUTDIR}/riv_nut.gnews_gnm.r05_to_tx2_3v3_nnsm_e100r100_260306.20260424.nc"
          }
       },
       "MARBL_D14C_FILE_1": {