ChangeLog update

Author: Katetc

doc/ChangeLog

@@ -1,5 +1,88 @@
 ===============================================================
 
+Tag name: cam6_4_086
+Originator(s): katetc
+Date: 18 April 2025
+One-line Summary: CCPP-ize Rayleigh Friction
+Github PR URL: https://github.com/ESCOMP/CAM/pull/1245
+
+Purpose of changes (include the issue number and title text for each relevant GitHub issue):
+- Brings in new atmospheric_physics external and changes Rayleigh Friction code to use CCPP compatible interfaces
+- Closes #1153 - Conversion of Rayleigh Friction to CCPP
+
+Describe any changes made to build system:
+	bld/configure
+	- Add src/atmos_phys/schemes/rayleigh_friction to the build tree
+
+Describe any changes made to the namelist:
+	bld/build-namelist
+	bld/namelist_files/namelist_definition.xml
+	- Changes to add rayleigh_friction_tend snapshot capability
+
+List any changes to the defaults for the boundary datasets: N/A
+
+Describe any substantial timing or memory changes: N/A
+
+Code reviewed by: nusbaume, cacraig
+
+List all files eliminated:
+D       src/physics/cam/rayleigh_friction.F90
+	- moved to atmospheric_physics: rayleigh_friction scheme
+
+List all files added and what they do:
+A	src/physics/cam/rayleigh_friction_cam.F90
+	- Contains the read_nl code and namelist parameters for ccppized Rayleigh Friction scheme
+
+List all existing files that have been modified, and describe the changes:
+M 	.gitmodules
+M	src/atmos_phys
+  - New atmospheric_physics external tag atmos_phys0_13_000 and updated submodule
+
+M	bld/build-namelist
+M	bld/namelist_files/namelist_definition.xml
+  - Add snapshot cpability for rayleigh_friction_tend
+
+M	bld/configure
+  - Add src/atmos_phys/schemes/rayleigh_friction to the build tree
+
+M	src/control/runtime_opts.F90
+  - Change module for rayleigh_friction_readnl from rayleigh_friction to rayleigh_friction_cam
+
+M	src/physics/cam/physpkg.F90
+M	src/physics/cam7/physpkg.F90
+  - Non-Answer changing modifications to use the CCPP version of Rayleigh Friction
+
+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:
+    ERP_Ln9.f09_f09_mg17.FCSD_HCO.derecho_intel.cam-outfrq9s (Overall: FAIL) details:
+    SMS_Lh12.f09_f09_mg17.FCSD_HCO.derecho_intel.cam-outfrq3h (Overall: DIFF) details:
+    - pre-existing failures due to HEMCO not having reproducible results (issues #1018 and #856)
+
+    SMS_D_Ln9_P1280x1.ne0CONUSne30x8_ne0CONUSne30x8_mt12.FCHIST.derecho_intel.cam-outfrq9s (Overall: FAIL) details:
+    - pre-existing failures due to build-namelist error requiring CLM/CTSM external update
+
+derecho/nvhpc/aux_cam:
+    ERS_Ln9.ne30pg3_ne30pg3_mg17.F2000dev.derecho_nvhpc.cam-outfrq9s_gpu_default (Overall: PASS) details:
+    - Compare against cam6_4_082_nvhpc baselines due to machine error preventing the test from running for the last few tags.
+
+izumi/nag/aux_cam:
+    - All pass
+
+izumi/gnu/aux_cam:
+    - All pass
+
+CAM tag used for the baseline comparison tests if different than previous
+tag: Nvhpc baseline comapare against cam6_4_082_nvhpc due to machine problems between tags
+
+Summarize any changes to answers:
+	No answer changes, all b4b
+
+===============================================================
+
 Tag name: cam6_4_085
 Originator(s): jimmielin
 Date: 11 April 2025