diff --git a/.gitmodules b/.gitmodules
index 2f5562a6f..7194b95d9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -58,7 +58,7 @@
         path = components/cam
         url = https://www.github.com/ESCOMP/CAM
         fxDONOTUSEurl = https://www.github.com/ESCOMP/CAM
-        fxtag = cam6_4_155
+        fxtag = cam6_4_157
         fxrequired = ToplevelRequired
 
 [submodule "clm"]
diff --git a/ChangeLog b/ChangeLog
index 5c05222b2..70635c986 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,45 @@
+==============================================================
+Tag name: cesm3_0_alpha08m
+Originator(s): CSEG
+Date: 22nd Mar 2026
+One-line Summary: CAM updates
+
+ccs_config                             https://github.com/ESMCI/ccs_config_cesm/tree/ccs_config_cesm1.0.79  --
+cime                                   https://github.com/ESMCI/cime/tree/cime6.1.169                       --
+components/fms                         https://github.com/ESCOMP/FMS_interface/tree/fi_250428               --
+share                                  https://github.com/ESCOMP/CESM_share/tree/share1.1.19                --
+components/cam                         https://github.com/ESCOMP/CAM/cam6_4_157                             **
+components/clm                         https://github.com/ESCOMP/ctsm/tree/ctsm5.4.024                      --
+components/cice                        https://github.com/ESCOMP/CESM_CICE/tree/cesm3_cice6_6_3_5           --
+components/mom                         https://github.com/ESCOMP/MOM_interface/mi_260121                    --
+components/cism                        https://github.com/ESCOMP/cism-wrapper/tree/cismwrap_2_2_013         --
+components/cdeps                       https://github.com/ESCOMP/CDEPS/tree/cdeps1.0.93                     --
+components/cmeps                       https://github.com/ESCOMP/CMEPS/tree/cmeps1.1.41                     --
+components/rtm                         https://github.com/ESCOMP/rtm/tree/rtm1_0_89                         --
+components/ww3                         https://github.com/ESCOMP/WW3-CESM/tree/main_0.0.19                  --
+components/mizuroute                   https://github.com/ESCOMP/mizuRoute/tree/cesm-coupling.v3.0.1        --
+components/mosart                      https://github.com/ESCOMP/mosart/tree/mosart1_1_13                   --
+libraries/parallelio                   https://github.com/NCAR/ParallilIO/tree/pio2_6_8                     --
+libraries/mpi-serial                   https://github.com/ESMCI/mpi-serial/tree/MPIserial_2.5.0             --
+tools/statistical_ensemble_test/pyCECT https://github.com/NCAR/PyCECT/tree/3.2.1                            --
+tools/CUPiD                            https://github.com/NCAR/CUPiD/tree/v0.5.1                            --
+
+cam
+    Cheryl Craig 2026-03-19 - cam6_4_157 - components/cam (cesm3_0_alpha08m)
+    https://github.com/ESCOMP/CAM/tags/cam6_4_157
+
+    Tuning changes for the spin-up run
+
+
+    Cheryl Craig 2026-03-06 - cam6_4_156 - components/cam (cesm3_0_alpha08m)
+    https://github.com/ESCOMP/CAM/tags/cam6_4_156
+
+    For Francis Vitt:
+    fixes to prescribed volcanic aerosols
+
+
+
+==============================================================
 Tag name: cesm3_0_alpha08l
 Originator(s): CSEG
 Date: 13th Mar 2026
diff --git a/components/cam b/components/cam
index b35f61545..b5e005060 160000
--- a/components/cam
+++ b/components/cam
@@ -1 +1 @@
-Subproject commit b35f61545141489df3f7534c1e472a7d7b332f6d
+Subproject commit b5e005060eb0d2b54e829e072681f7900c379c4a