cam6_4_189: TUVx bug fix and CLM50 in FMOZ

cime_config/config_compsets.xml

@@ -14,7 +14,7 @@
     Where for the CAM specific compsets below the following is supported
     TIME = Time period (e.g. 2000, HIST, RCP8...)
     ATM  = [CAM40, CAM50, CAM60, CAM70]
-    LND  = [CLM45, CLM50, CLM60, SLND]
+    LND  = [CLM50, CLM60, SLND]
     ICE  = [CICE, DICE, SICE]
     OCN  = [DOCN, ,AQUAP, SOCN]
     ROF  = [RTM, SROF]
@@ -525,7 +525,7 @@
 
   <compset>
     <alias>FMOZ</alias>
-    <lname>2000_CAM40%TMOZ_CLM45%SP_CICE%PRES_DOCN%DOM_RTM_SGLC_SWAV</lname>
+    <lname>2000_CAM40%TMOZ_CLM50%SP_CICE%PRES_DOCN%DOM_RTM_SGLC_SWAV</lname>
   </compset>
 
   <compset>

cime_config/testdefs/testlist_cam.xml

@@ -1062,14 +1062,13 @@
       <option name="wallclock">00:30:00</option>
     </options>
   </test>
-<!--              471                         -->
-  <test compset="QPWmaC6" grid="f10_f10_mg37" name="ERC_D_Ln9" testmods="cam/outfrq3s" supported="false">
+  <test compset="QPWmaC6" grid="f10_f10_mg37" name="ERC_D_Ln9" testmods="cam/outfrq9s_tuvx_waccm_ma_mam5" supported="false">
     <machines>
       <machine name="izumi" compiler="nag" category="aux_cam"/>
       <machine name="izumi" compiler="nag" category="waccm"/>
     </machines>
     <options>
-      <option name="comment" >471 tsm, ter</option>
+      <option name="comment" >TUVx in WACCM</option>
       <option name="wallclock">00:30:00</option>
     </options>
   </test>

doc/ChangeLog

@@ -1,5 +1,69 @@
 ===============================================================
 
+Tag name: cam6_4_189
+Originator(s): fvitt
+Date: 21 Jul 2026
+One-line Summary: Fix TUVx bug; Use CLM50 in FMOZ compset
+Github PR URL: https://github.com/ESCOMP/CAM/pull/1621
+
+Purpose of changes (include the issue number and title text for each relevant GitHub issue):
+
+ Fix TUVx cloud optical depth bug (issue #1619)
+ Update the FMOZ compset to use CLM50 rather than CLM45 (issue #1613)
+ Remove unused mo_setaer module (issue #1582)
+
+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 ekluzek
+
+List all files eliminated:
+D       src/chemistry/mozart/mo_setaer.F90
+ - remove dead code
+
+List all files added and what they do: N/A
+
+List all existing files that have been modified, and describe the changes:
+M       cime_config/config_compsets.xml
+ - use CLM50 in FMOZ compset
+
+M       cime_config/testdefs/testlist_cam.xml
+ - change QPWmaC6 NAG test to include TUVx photolysis
+
+M       doc/ChangeLog
+M       src/chemistry/mozart/mo_tuvx.F90
+ - scale cloud optical depth by cloud fraction
+
+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:
+  DIFF SMS_D_Ln9.f19_f19_mg17.FWma2000climo.derecho_intel.cam-outfrq9s_waccm_ma_mam4
+   - expected baseline failure due to TUVx bug fix
+
+derecho/nvhpc/aux_cam: All PASS
+
+izumi/nag/aux_cam:
+  DIFF ERC_D_Ln9.f10_f10_mg37.QPWmaC6.izumi_nag.cam-outfrq9s_tuvx_waccm_ma_mam5
+   - new TUVx test -- no baseline to compare against
+
+  FAIL ERC_D_Ln9.f10_f10_mt232.FHIST_C5.izumi_nag.cam-outfrq3s_subcol COMPARE_base_rest
+   - pre-existing failure -- see https://github.com/ESCOMP/CAM/issues/1514
+
+izumi/gnu/aux_cam: All PASS
+
+Summarize any changes to answers: bit-for-bit unchanged
+
+===============================================================
+===============================================================
+
 Tag name: cam6_4_188
 Originator(s): jimmielin
 Date: July 20, 2026