ChangeLog update

Author: fvitt

doc/ChangeLog

@@ -1,5 +1,65 @@
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+Tag name: cam6_4_152
+Originator(s): fvitt
+Date: 13 Feb 2026
+One-line Summary: TEM diagnostics updates
+Github PR URL: https://github.com/ESCOMP/CAM/pull/1477
+
+Purpose of changes (include the issue number and title text for each relevant GitHub issue):
+
+ Issue #1475
+  - Use ESMF 1st order conservative regridding method when computing zonal mean TEM diagnostics
+  - Compute terms before regridding to avoid multiplication of errors
+
+Describe any changes made to build system: N/A
+
+Describe any changes made to the namelist: N/A
+
+List any changes to the defaults for the boundary datasets: N/A
+
+Describe any substantial timing or memory changes: N/A
+
+Code reviewed by: jimmielin
+
+List all files eliminated: N/A
+
+List all files added and what they do: N/A
+
+List all existing files that have been modified, and describe the changes:
+M       src/utils/ctem_diags_mod.F90
+ - compute terms before regridding to avoid multiplication of errors
+
+M       src/utils/esmf_lonlat_grid_mod.F90
+ - need grid cell corners for conservation regridding
+
+M       src/utils/esmf_phys2lonlat_mod.F90
+ - use ESMF conservative regridding
+
+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:
+  FAIL ERI_D_Ln18.ne16pg3_ne16pg3_mt232.FHIST_C4.derecho_intel.cam-outfrq3s_eri
+   - pre-existing failure
+     ERI bug in CICE -- See: https://github.com/ESCOMP/CESM_CICE/issues/34
+
+  DIFF ERS_Ln9.ne30pg3_ne30pg3_mg17.FHISTC_WXma.derecho_intel.cam-outfrq9s_ctem
+   - differences TEM diagnostics output, otherwise bit-for-bit
+
+derecho/nvhpc/aux_cam: All PASS
+
+izumi/nag/aux_cam: All PASS
+
+izumi/gnu/aux_cam: All PASS
+
+Summarize any changes to answers: bit-for-bit
+
+===============================================================
+===============================================================
+
 Tag name: cam6_4_151
 Originator(s): Haipeng Lin
 Date: Feb 12, 2026