ChangeLog update

doc/ChangeLog

@@ -8,10 +8,12 @@ Github PR URL: https://github.com/ESCOMP/CAM/pull/1110
 
 Purpose of changes (include the issue number and title text for each relevant GitHub issue):
 
- #1082 Implement an age of air diagnostic tracer (AOA1MF) which has a mixing ratio lower 
-  boundary condition which increases 2% per year starting from 1.e-6. Initial mass mixing ratios.
-  Legacy tracers AOA1 and AOA2 are removed.
-
+ #1082 Implement an age of air diagnostic tracer (AOA1MF) which has a mixing ratio lower
+  boundary condition which increases 2% per year starting from 1.e-6. Initial mass mixing
+  ratios. Legacy tracers AOA1 and AOA2 are removed.
+
+  Update upper boundary file in CAM LT use case simulations that begin in 1850.
+
 Describe any changes made to build system: N/A
 
 Describe any changes made to the namelist: N/A
@@ -28,9 +30,12 @@ List all files added and what they do:
 A       cime_config/testdefs/testmods_dirs/cam/outfrq1d_aoa/shell_commands
 A       cime_config/testdefs/testmods_dirs/cam/outfrq1d_aoa/user_nl_cam
 A       cime_config/testdefs/testmods_dirs/cam/outfrq1d_aoa/user_nl_clm
+ - for testing age-of-air tracers
 
 List all existing files that have been modified, and describe the changes:
 M       bld/configure
+ - change number of advected AOA tracers to 3
+
 M       bld/namelist_files/use_cases/1950-2010_ccmi_refc1_waccmx_ma.xml
 M       bld/namelist_files/use_cases/sd_waccm_ma_cam4.xml
 M       bld/namelist_files/use_cases/sd_waccm_ma_cam6.xml
@@ -56,10 +61,21 @@ M       bld/namelist_files/use_cases/waccmx_ma_2000_cam4.xml
 M       bld/namelist_files/use_cases/waccmx_ma_2000_cam6.xml
 M       bld/namelist_files/use_cases/waccmx_ma_hist_cam6.xml
 M       bld/namelist_files/use_cases/waccmxie_ma_2000_cam4.xml
+ - remove obsolete AOA tracer fields from fincl lists
+
+M       bld/namelist_files/use_cases/hist_cam_lt.xml
+ - update UBC file for runs that start in 1850
+
 M       cime_config/testdefs/testlist_cam.xml
+ - add new TS4-cam7-MT AOA test
+
 M       src/physics/cam/aoa_tracers.F90
+ - implement new AOAMF tracer (described above)
+ - remove obsolete AOA1 and AOA2 tracers
+
 M       src/physics/cam/physpkg.F90
 M       src/physics/cam7/physpkg.F90
+ - aoa_tracers_timestep_tend interface change
 
 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,
@@ -73,6 +89,10 @@ derecho/nvhpc/aux_cam:
 izumi/nag/aux_cam:
 
 izumi/gnu/aux_cam:
+  DIFF SMS_D_Ln9.f10_f10_mg37.QPWmaC4.izumi_gnu.cam-outfrq9s_apmee
+  DIFF SMS_P48x1_D_Ln9.f19_f19_mg17.FW4madSD.izumi_gnu.cam-outfrq9s
+ - expect baseline failures -- differences in age-of-air tracers
+   otherwise bit-for-bit
 
 Summarize any changes to answers: bit-for-bit