diff --git a/README.md b/README.md
index b1eb353e..43d27849 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@
 | Repository                                                                     | Version                                                                                               |
 | ----------                                                                     | -------                                                                                               |
 | [ACHEM](https://github.com/GEOS-ESM/ACHEM)                                     | [v1.0.1](https://github.com/GEOS-ESM/ACHEM/releases/tag/v1.0.1)                                       |
+| [Aerosol_ExtData](https://github.com/GEOS-ESM/Aerosol_ExtData)                 | [v1.0.0](https://github.com/GEOS-ESM/Aerosol_ExtData/releases/tag/v1.0.0)                            |
 | [CARMA](https://github.com/GEOS-ESM/CARMA)                                     | [v1.1.0](https://github.com/GEOS-ESM/CARMA/releases/tag/v1.1.0)                                       |
 | [CICE](https://github.com/GEOS-ESM/CICE)                                       | [geos/v0.2.0](https://github.com/GEOS-ESM/CICE/releases/tag/geos%2Fv0.2.0)                            |
 | [CPLFCST_Etc](https://github.com/GEOS-ESM/CPLFCST_Etc)                         | [v1.0.1](https://github.com/GEOS-ESM/CPLFCST_Etc/releases/tag/v1.0.1)                                 |
diff --git a/components.yaml b/components.yaml
index c0bad975..3b1c27dc 100644
--- a/components.yaml
+++ b/components.yaml
@@ -87,7 +87,8 @@ fvdycore:
 GEOSchem_GridComp:
   local: ./src/Components/@GEOSgcm_GridComp/GEOSagcm_GridComp/GEOSphysics_GridComp/@GEOSchem_GridComp
   remote: ../GEOSchem_GridComp.git
-  tag: GCMv12-rc25
+  #tag: GCMv12-rc25
+  branch: feature/v12-move-extdata-yaml
   develop: feature/sdrabenh/gcm_v12
 
 HEMCO:
@@ -105,8 +106,16 @@ geos-chem:
 GOCART:
   local: ./src/Components/@GEOSgcm_GridComp/GEOSagcm_GridComp/GEOSphysics_GridComp/@GEOSchem_GridComp/@GOCART
   remote: ../GOCART.git
-  tag: GCMv12-rc25
-  develop: feature/sdrabenh/gcm_v12
+  #tag: GCMv12-rc25
+  branch: feature/v12-move-extdata-yaml
+  develop: develop
+
+Aerosol_ExtData:
+  local: ./src/Components/@GEOSgcm_GridComp/GEOSagcm_GridComp/GEOSphysics_GridComp/@GEOSchem_GridComp/@Aerosol_ExtData
+  remote: ../Aerosol_ExtData.git
+  #tag: GCMv12-rc25
+  branch: feature/v12-move-extdata-yaml
+  develop: develop
 
 QuickChem:
   local: ./src/Components/@GEOSgcm_GridComp/GEOSagcm_GridComp/GEOSphysics_GridComp/@GEOSchem_GridComp/@QuickChem
@@ -165,7 +174,8 @@ GAAS:
 ACHEM:
   local: ./src/Components/@GEOSgcm_GridComp/GEOSagcm_GridComp/GEOSphysics_GridComp/@GEOSchem_GridComp/@ACHEM
   remote: ../ACHEM.git
-  tag: v1.0.1
+  #tag: v1.0.1
+  branch: feature/v12-move-extdata-yaml
   develop: develop
 
 GEOS_OceanGridComp: