Final ChangeLog for cam6_4_150

Author: cacraigucar

doc/ChangeLog

@@ -1,3 +1,82 @@
+
+===============================================================
+
+Tag name: cam6_4_150
+Originator(s): Jack Chen, Peter Lauritzen, cacraigucar
+Date: Feb 9, 2026
+One-line Summary: fix frontogenesis function bug for FV
+Github PR URL: https://github.com/ESCOMP/CAM/pull/1467
+
+Purpose of changes (include the issue number and title text for each relevant GitHub issue):
+- Gradient computations for the fronotogenesis function were originally computed over terrain-following coordinate.
+  Correction terms are added so gradients are on isobaric coordinates.
+- diagnostic PS and PSDRY computation in CAM-SE dycore written to log file is missing mass over model top.
+
+
+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: cacraigucar
+
+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/dynamics/fv/gravity_waves_sources.F90
+   M       src/dynamics/se/dycore/prim_state_mod.F90
+              - Changes as described above
+
+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 test discovered a bug in CICE:  See: https://github.com/ESCOMP/CESM_CICE/issues/34
+
+  ERP_Lh12.f19_f19_mg17.FW4madSD.derecho_intel.cam-outfrq3h (Overall: DIFF) details:
+  ERP_Ln9.f09_f09_mg17.FCSD_HCO.derecho_intel.cam-outfrq9s (Overall: DIFF) details:
+  ERP_Ln9.f19_f19_mg17.FWsc1850.derecho_intel.cam-outfrq9s (Overall: DIFF) details:
+  ERS_Ln9.f09_f09_mg17.FX2000.derecho_intel.cam-outfrq9s (Overall: DIFF) details:
+  ERS_Ln9.f19_f19_mg17.FXSD.derecho_intel.cam-outfrq9s (Overall: DIFF) details:
+  SMS_D_Ln9.f09_f09_mg17.FCts2nudged.derecho_intel.cam-outfrq9s_leapday (Overall: DIFF) details:
+  SMS_D_Ln9.f09_f09_mg17.FCvbsxHIST.derecho_intel.cam-outfrq9s (Overall: DIFF) details:
+  SMS_D_Ln9.f19_f19_mg17.FCARMA2000climo.derecho_intel.cam-outfrq9s (Overall: DIFF) details:
+  SMS_D_Ln9.f19_f19_mg17.FWma2000climo.derecho_intel.cam-outfrq9s (Overall: DIFF) details:
+  SMS_D_Ln9.f19_f19_mg17.FWma2000climo.derecho_intel.cam-outfrq9s_waccm_ma_mam4 (Overall: DIFF) details:
+  SMS_D_Ln9.f19_f19_mg17.QPC2000climo.derecho_intel.cam-outfrq3s_usecase (Overall: DIFF) details:
+  SMS_Ld1.f09_f09_mg17.FCHIST_GC.derecho_intel.cam-outfrq1d (Overall: DIFF) details:
+  SMS_Ld1.f09_f09_mg17.FW2000climo.derecho_intel.cam-outfrq1d (Overall: DIFF) details:
+  SMS_Lh12.f09_f09_mg17.FCSD_HCO.derecho_intel.cam-outfrq3h (Overall: DIFF) details:
+  SMS_Ln9.f09_f09_mg17.FW1850.derecho_intel.cam-reduced_hist3s (Overall: DIFF) details:
+      - Answer changes for FV expected
+
+derecho/nvhpc/aux_cam: all pass
+
+izumi/nag/aux_cam:
+  ERC_D_Ln9.f10_f10_mg37.QPWmaC6.izumi_nag.cam-outfrq3s (Overall: DIFF) details:
+     - Answer changes for FV expected
+
+izumi/gnu/aux_cam:
+  ERC_D_Ln9.f10_f10_mg37.QPC4.izumi_gnu.cam-outfrq3s_diags (Overall: DIFF) details:
+  SMS_D_Ln9.f10_f10_mg37.FWmaHIST.izumi_gnu.cam-outfrq9s_mee_fluxes (Overall: DIFF) details:
+  SMS_D_Ln9.f10_f10_mg37.QPWmaC4.izumi_gnu.cam-outfrq9s_apmee (Overall: DIFF) details:
+  SMS_D_Ln9.f19_f19_mt232.FW4madSD.izumi_gnu.cam-outfrq9s (Overall: DIFF) details:
+     - Answer changes for FV expected
+
+Summarize any changes to answers:
+  FV answers differences are climate changing - ACOM will need to retune at a future date
+
+===============================================================
 ===============================================================
 
 Tag name: cam6_4_149