diff --git a/bld/namelist_files/namelist_defaults_cam.xml b/bld/namelist_files/namelist_defaults_cam.xml
index 0471219ab3..f94ab64353 100644
--- a/bld/namelist_files/namelist_defaults_cam.xml
+++ b/bld/namelist_files/namelist_defaults_cam.xml
@@ -125,10 +125,10 @@
atm/cam/inic/se/f.e22.FCnudged.ne0CONUSne30x8_ne0CONUSne30x8_mt12.cam6_2_032.002.cam.i.2013-01-01-00000_c200623.nc
atm/cam/inic/se/f.e22.FCnudged.ne0CONUSne30x8_ne0CONUSne30x8_mt12.cam6_2_032.002.cam.i.2013-01-01-00000_c200623.nc
atm/cam/inic/se/f.e22.FCnudged.ne30_ne30_mg17.release-cesm2.2.0_spinup.2010_2020.001.cam.i.2011-01-01-00000_L58_c220310.nc
-atm/cam/inic/se/f.cam6_3_112.FCMTHIST_v0c.ne30.non-ogw-ubcT-effgw0.7.001.cam.i.1998-01-01-00000_c230810.nc
+atm/cam/inic/se/f.cam6_3_160.FCMT_ne30.moving_mtn.001.cam.i.1996-01-01-00000_c240618.nc
atm/cam/inic/se/FLT_L58_ne30pg3_IC_c220623.nc
-atm/cam/inic/se/cam7_FMT_ne30pg3_mg17_L93_c221118.nc
+atm/cam/inic/se/c153_ne30pg3_FMTHIST_x02.cam.i.1990-01-01-00000_c240618.nc
atm/cam/chem/trop_mozart/ic/cami_0000-09-01_4x5_L26_c060217.nc
atm/cam/chem/trop_mozart/ic/cami_0000-09-01_10x15_L26_c060216.nc
@@ -220,7 +220,7 @@
atm/cam/inic/se/cam6_QPC6_topo_ne3pg3_mg37_L32_01-01-31_c221214.nc
atm/cam/inic/se/cam6_QPC6_topo_ne3pg3_mg37_L58_01-01-31_c221214.nc
-atm/cam/inic/se/cam6_QPC6_topo_ne3pg3_mg37_L93_01-01-31_c221214.nc
+atm/cam/inic/se/cam6_FMTHIST_ne3pg3_mg37_L93_79-02-01_c240517.nc
atm/cam/inic/homme/cami-mam3_0000-01_ne5np4_L30.140707.nc
atm/cam/inic/se/F2000climo_ne5pg3_mg37_L32_01-01-31_c230520.nc
atm/cam/inic/se/F2000climo_ne5pg3_mg37_L58_01-01-31_c230520.nc
@@ -255,7 +255,7 @@
atm/cam/inic/se/cam6_QPC6_aqua_ne3pg3_mg37_L32_01-01-31_c221214.nc
atm/cam/inic/se/cam6_QPC6_aqua_ne3pg3_mg37_L58_01-01-31_c221214.nc
-atm/cam/inic/se/cam6_QPC6_aqua_ne3pg3_mg37_L93_01-01-31_c221214.nc
+atm/cam/inic/se/cam6_QPC6_aqua_ne3pg3_mg37_L93_01_02_01_c240518.nc
atm/cam/inic/se/ape_cam6_ne5np4_L32_c170517.nc
atm/cam/inic/se/ape_cam6_ne16np4_L32_c170509.nc
atm/cam/inic/se/ape_cam6_ne30np4_L32_c170509.nc
diff --git a/doc/ChangeLog b/doc/ChangeLog
index 78cd2e72fb..14b401f304 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,5 +1,83 @@
===============================================================
+Tag name: cam6_4_003
+Originator(s): adamrher, jet
+Date: Thu Jun 28, 2024
+One-line Summary: Corrected L93 default IC files
+Github PR URL: https://github.com/ESCOMP/CAM/pull/1040
+
+Purpose of changes (include the issue number and title text for each relevant GitHub issue):
+
+ The L93 hybrid coefficients had a discontinuous kink, or offset, creating an anomalously thin layer
+ in the 300 hPa - 100 hPa altitude range. This region overlaps with the L58 grid, but for some reason
+ the L58 grid didn't get contaminated like it was in L93. We aren't sure how this happened.
+ More here: https://github.com/ESCOMP/CAM/issues/1034
+
+ fixes #1034 - Problematic hybrid coefficients in L99
+
+Describe any changes made to build system: none
+
+Describe any changes made to the namelist: none
+
+List any changes to the defaults for the boundary datasets: Files with problematic hybrid coeff were
+ regenerated.
+
+Describe any substantial timing or memory changes: none
+
+Code reviewed by: cacraigucar, jet
+
+List all files eliminated:
+ Boundary data defaults eliminated from namelist_defaults_cam.xml (files still exist but will no longer be used)
+ atm/cam/inic/se/f.cam6_3_112.FCMTHIST_v0c.ne30.non-ogw-ubcT-effgw0.7.001.cam.i.1998-01-01-00000_c230810.nc
+ atm/cam/inic/se/cam7_FMT_ne30pg3_mg17_L93_c221118.nc
+ atm/cam/inic/se/cam6_QPC6_topo_ne3pg3_mg37_L93_01-01-31_c221214.nc
+ atm/cam/inic/se/cam6_QPC6_aqua_ne3pg3_mg37_L93_01-01-31_c221214.nc
+
+List all files added and what they do:
+ New files added to data repo and namelist_defaults-cam.xml:
+ atm/cam/inic/se/f.cam6_3_160.FCMT_ne30.moving_mtn.001.cam.i.1996-01-01-00000_c240618.nc
+ atm/cam/inic/se/c153_ne30pg3_FMTHIST_x02.cam.i.1990-01-01-00000_c240618.nc
+ atm/cam/inic/se/cam6_FMTHIST_ne3pg3_mg37_L93_79-02-01_c240517.nc
+ atm/cam/inic/se/cam6_QPC6_aqua_ne3pg3_mg37_L93_01_02_01_c240518.nc
+
+List all existing files that have been modified, and describe the changes:
+
+bld/namelist_files/namelist_defaults_cam.xml
+. Replaced problematic 93 level IC defaults with new files.
+
+If there were any failures reported from running test_driver.sh on any test
+platform, and checkin with these failures has been OK'd by the gatekeeper,
+then copy the lines from the td.*.status files for the failed tests to the
+appropriate machine below. All failed tests must be justified.
+
+derecho/intel/aux_cam: BFB except:
+
+ERP_Ln9.f09_f09_mg17.FCSD_HCO.derecho_intel.cam-outfrq9s (Overall: FAIL) details:
+SMS_D_Ln9_P1280x1.ne0ARCTICne30x4_ne0ARCTICne30x4_mt12.FHIST.derecho_intel.cam-outfrq9s (Overall: PEND) details:
+SMS_D_Ln9_P1280x1.ne0CONUSne30x8_ne0CONUSne30x8_mt12.FCHIST.derecho_intel.cam-outfrq9s (Overall: PEND) details:
+SMS_D_Ln9.T42_T42.FSCAM.derecho_intel.cam-outfrq9s (Overall: FAIL) details:
+- pre-existing failures
+
+SMS_D_Ln9.ne30pg3_ne30pg3_mg17.FMTHIST.derecho_intel.cam-outfrq9s (Overall: DIFF) details:
+- expected change due to new IC default
+
+izumi/nag/aux_cam: BFB except:
+
+DAE.f45_f45_mg37.FHS94.izumi_nag.cam-dae (Overall: FAIL) details:
+- pre-existing failure
+
+izumi/gnu/aux_cam: BFB
+
+CAM tag used for the baseline comparison tests if different than previous
+tag: NA
+
+Summarize any changes to answers: This changes answers for
+ configurations using new default 93L IC files.
+
+
+===============================================================
+===============================================================
+
Tag name: cam6_4_002
Originator(s): adamrher, eaton
Date: Wed Jun 26, 2024