diff --git a/CHANGELOG.md b/CHANGELOG.md
index b7f695551..82ce69c47 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,14 @@ This file documents all notable changes to the GEOS-Chem repository starting in
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased] - TBD
+### Changed
+- Updated `run/CESM` with alphabetical sorting of species in `geoschem_config.yml`
+
+### Removed
+- Disabled `run/CESM` ParaNOx extension by default in `HEMCO_Config.rc`
+- Removed MPI broadcasts in CESM-only UCX code; MPI broadcast done at coupler level
+
 ## [14.4.0] - 2024-05-30
 ### Added
 - Added `SpcConc%Units` for species-specific unit conversion
diff --git a/GeosCore/ucx_mod.F90 b/GeosCore/ucx_mod.F90
index f72988ae7..c7e2a3122 100644
--- a/GeosCore/ucx_mod.F90
+++ b/GeosCore/ucx_mod.F90
@@ -3903,8 +3903,6 @@ SUBROUTINE NOXCOEFF_INIT( Input_Opt, State_Grid, State_Chm )
     USE State_Chm_Mod,      ONLY : ChmState
 #if defined( MODEL_CESM )
     USE UNITS,              ONLY : freeUnit
-    USE CAM_ABORTUTILS,     ONLY : endrun
-    USE SPMD_UTILS,         ONLY : mpicom, masterprocid, mpi_success, mpi_real8
 #endif
 !
 ! !INPUT PARAMETERS:
@@ -3930,10 +3928,6 @@ SUBROUTINE NOXCOEFF_INIT( Input_Opt, State_Grid, State_Chm )
     INTEGER            :: I, AS, IOS
     INTEGER            :: IMON, ITRAC, ILEV
     INTEGER            :: IU_FILE
-#if defined( MODEL_CESM )
-    INTEGER            :: nSize ! Number of elements in State_Chm%NOXCOEFF
-    INTEGER            :: ierr
-#endif
 
     ! Strings
     CHARACTER(LEN=255) :: NOX_FILE
@@ -4057,7 +4051,6 @@ SUBROUTINE NOXCOEFF_INIT( Input_Opt, State_Grid, State_Chm )
     State_Chm%NOXCOEFF = 0.0e+0_fp
 
 #if defined( MODEL_CESM )
-    nSize = State_Chm%JJNOXCOEFF * UCX_NLEVS * 6 * 12
     IF ( Input_Opt%amIRoot ) THEN
 #endif
     ! Fill array
@@ -4138,9 +4131,6 @@ SUBROUTINE NOXCOEFF_INIT( Input_Opt, State_Grid, State_Chm )
     ENDDO !IMON
 #if defined( MODEL_CESM )
     ENDIF
-
-    CALL MPI_BCAST( State_Chm%NOXCOEFF, nSize, mpi_real8, masterprocid, mpicom, ierr )
-    IF ( ierr /= mpi_success ) CALL endrun(subname//': MPI_BCAST ERROR: NOXCOEFF')
 #endif
 
   END SUBROUTINE NOXCOEFF_INIT
diff --git a/run/CESM/HEMCO_Config.rc b/run/CESM/HEMCO_Config.rc
index 2988dfe0a..f3fafd6ec 100644
--- a/run/CESM/HEMCO_Config.rc
+++ b/run/CESM/HEMCO_Config.rc
@@ -162,7 +162,7 @@ VerboseOnCores:              root       # Accepted values: root all
 # -----------------------------------------------------------------------------
 100     Custom                 : off   -
 101     SeaFlux                : on    DMS/ACET/ALD2/MENO3/ETNO3/MOH
-102     ParaNOx                : on    NO/NO2/O3/HNO3
+102     ParaNOx                : off   NO/NO2/O3/HNO3
     --> LUT data format        :       nc
     --> LUT source dir         :       $ROOT/PARANOX/v2015-02
 103     LightNOx               : off   NO
diff --git a/run/CESM/geoschem_config.yml b/run/CESM/geoschem_config.yml
index d7a8a5270..be47c127c 100644
--- a/run/CESM/geoschem_config.yml
+++ b/run/CESM/geoschem_config.yml
@@ -94,6 +94,9 @@ operations:
       - AERI
       - ALD2
       - ALK4
+      - AONITA
+      - AROMP4
+      - AROMP5
       - ASOA1
       - ASOA2
       - ASOA3
@@ -101,9 +104,6 @@ operations:
       - ASOG1
       - ASOG2
       - ASOG3
-      - AONITA
-      - AROMP4
-      - AROMP5
       - ATOOH
       - BALD
       - BCPI