cam6_4_169: CARMA with RRTMGP

bld/configure

@@ -989,13 +989,6 @@ if ($rad_pkg eq 'camrt') {
             "                 with aerosol package $chem_pkg\n";
     }
 }
-elsif ($rad_pkg =~ m/rrtmg/) {
-
-    # RRTMGP not currently working with CARMA
-    if ($rad_pkg eq 'rrtmgp' and $carma_pkg ne 'none') {
-        die "configure ERROR: The CARMA microphysics package does not currently work with RRTMGP\n";
-    }
-}
 
 $cfg_ref->set('rad', $rad_pkg);
 

cime_config/testdefs/testlist_cam.xml

@@ -324,6 +324,16 @@
     </options>
   </test>
 
+  <test compset="QPC7" grid="ne3pg3_ne3pg3_mt232" name="SMS_D_Ln9" testmods="cam/carma_test_tracers">
+    <machines>
+      <machine name="izumi" compiler="nag" category="aux_cam"/>
+    </machines>
+    <options>
+      <option name="comment" >CAM7, CARMA test tracers</option>
+      <option name="wallclock">00:30:00</option>
+    </options>
+  </test>
+
   <test compset="FCARMA2000climo" grid="f19_f19_mg17" name="SMS_D_Ln9" testmods="cam/outfrq9s" supported="false">
     <machines>
       <machine name="derecho" compiler="intel" category="aux_cam"/>
@@ -334,6 +344,15 @@
       <option name="comment">CARMA trop_strat model test</option>
     </options>
   </test>
+  <test compset="FWmaCARMAHIST" grid="f19_f19_mg17" name="SMS_D_Ln9" testmods="cam/outfrq9s" supported="false">
+    <machines>
+      <machine name="derecho" compiler="intel" category="carma"/>
+    </machines>
+    <options>
+      <option name="wallclock">00:40:00</option>
+      <option name="comment">CARMA WACCM trop_strat model test</option>
+    </options>
+  </test>
 
   <test compset="FHIST_C5" grid="f10_f10_mt232" name="TMC_D_Ln9" testmods="cam/mc_ttrac">
     <machines>

doc/ChangeLog

@@ -1,5 +1,83 @@
 ===============================================================
 
+Tag name: cam6_4_169
+Originator(s): fvitt
+Date: 28 Apr 2026
+One-line Summary: Enable CARMA with cam7 physics and RRTMGP radiation
+Github PR URL: https://github.com/ESCOMP/CAM/pull/1508
+
+Purpose of changes (include the issue number and title text for each relevant GitHub issue):
+
+ - Enables the use of CARMA with RRTMGP / cam7 physics -- issue #1430
+ - Improve performance of CARMA
+
+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: peverwhee
+
+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       bld/configure
+ - allow both carma and rrtmgp in same configuration
+
+M       cime_config/testdefs/testlist_cam.xml
+ - add QPC7 with carma_test_tracers aux_cam test
+ - add FCARMAHIST carma test
+
+M       src/chemistry/aerosol/aero_convproc.F90
+M       src/chemistry/aerosol/aerosol_properties_mod.F90
+M       src/chemistry/aerosol/aerosol_state_mod.F90
+M       src/chemistry/aerosol/bulk_aerosol_properties_mod.F90
+M       src/chemistry/aerosol/carma_aerosol_properties_mod.F90
+M       src/chemistry/aerosol/modal_aerosol_properties_mod.F90
+M       src/physics/cam/ndrop.F90
+ - improve efficiency by getting aerosol concentrations (number and volumn)
+   for all columns and levels at once
+
+M       src/physics/cam/physpkg.F90
+M       src/physics/cam7/physpkg.F90
+ - register carma after rrtmgp
+
+M       src/physics/carma/cam/carma_intr.F90
+ - allow the option to create optics files when rrtmgp is used
+
+M       src/physics/rrtmgp/radiation.F90
+ - initialize at registration time
+
+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: All PASS
+
+derecho/nvhpc/aux_cam: All PASS
+
+izumi/nag/aux_cam:
+
+  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
+
+  DIFF SMS_D_Ln9.ne3pg3_ne3pg3_mt232.QPC7.izumi_nag.cam-carma_test_tracers
+   -new test
+
+izumi/gnu/aux_cam: All PASS
+
+Summarize any changes to answers: bit-for-bit
+
+===============================================================
+===============================================================
+
 Tag name: cam6_4_168
 Originator(s): jimmielin, cacraig, sjsprecious
 Date: April 24, 2026

src/chemistry/aerosol/aero_convproc.F90

@@ -1711,8 +1711,8 @@ subroutine activate_convproc( aero_props,    &
    character(len=32) :: spec_type
 
    real(r8) :: tmpa, tmpb, tmpc ! working variable
-   real(r8) :: naerosol_a(1)    ! number conc (1/m3)
-   real(r8) :: vaerosol_a(1)    ! volume conc (m3/m3)
+   real(r8) :: naerosol_a(1,1)    ! number conc (1/m3)
+   real(r8) :: vaerosol_a(1,1)    ! volume conc (m3/m3)
 
 !-----------------------------------------------------------------------
 
@@ -1779,12 +1779,12 @@ subroutine activate_convproc( aero_props,    &
       tmpa = tmpa + max( conent(2,mm), 0.0_r8 )
       naerosol(m) = tmpa * rhoair
 
-      naerosol_a(1) = naerosol(m)
-      vaerosol_a(1) = vaerosol(m)
+      naerosol_a(1,1) = naerosol(m)
+      vaerosol_a(1,1) = vaerosol(m)
 
       call aero_props%apply_number_limits( naerosol_a, vaerosol_a, 1, 1, m )
 
-      naerosol(m) = naerosol_a(1)
+      naerosol(m) = naerosol_a(1,1)
    end do
 
 ! call Razzak-Ghan activation routine with single updraft
@@ -1918,8 +1918,8 @@ subroutine activate_convproc_method2( aero_props, &
    character(len=32) :: spec_type
 
    real(r8) :: tmpa, tmpb, tmpc ! working variable
-   real(r8) :: naerosol_a(1)    ! number conc (1/m3)
-   real(r8) :: vaerosol_a(1)    ! volume conc (m3/m3)
+   real(r8) :: naerosol_a(1,1)    ! number conc (1/m3)
+   real(r8) :: vaerosol_a(1,1)    ! volume conc (m3/m3)
 
 !-----------------------------------------------------------------------
 
@@ -1999,12 +1999,12 @@ subroutine activate_convproc_method2( aero_props, &
       tmpa = tmpa + max( conu(2,mm), 0.0_r8 )
       naerosol(m) = tmpa * rhoair
 
-      naerosol_a(1) = naerosol(m)
-      vaerosol_a(1) = vaerosol(m)
+      naerosol_a(1,1) = naerosol(m)
+      vaerosol_a(1,1) = vaerosol(m)
 
       call aero_props%apply_number_limits( naerosol_a, vaerosol_a, 1, 1, m )
 
-      naerosol(m) = naerosol_a(1)
+      naerosol(m) = naerosol_a(1,1)
 
    end do
 

src/chemistry/aerosol/aerosol_properties_mod.F90

@@ -250,13 +250,13 @@ end function aero_icenuc_updates_mmr
      !------------------------------------------------------------------------------
      ! apply max / min to number concentration
      !------------------------------------------------------------------------------
-     subroutine aero_apply_num_limits( self, naerosol, vaerosol, istart, istop, m )
+     subroutine aero_apply_num_limits( self, naerosol, vaerosol, ncol, nlev, m )
        import :: aerosol_properties, r8
        class(aerosol_properties), intent(in) :: self
-       real(r8), intent(inout) :: naerosol(:)  ! number conc (1/m3)
-       real(r8), intent(in)    :: vaerosol(:)  ! volume conc (m3/m3)
-       integer,  intent(in) :: istart          ! start column index (1 <= istart <= istop <= pcols)
-       integer,  intent(in) :: istop           ! stop column index
+       real(r8), intent(inout) :: naerosol(:,:)  ! number conc (1/m3)
+       real(r8), intent(in)    :: vaerosol(:,:)  ! volume conc (m3/m3)
+       integer,  intent(in) :: ncol            ! number of columns
+       integer,  intent(in) :: nlev            ! number of vert levels
        integer,  intent(in) :: m               ! mode or bin index
 
      end subroutine aero_apply_num_limits

src/chemistry/aerosol/aerosol_state_mod.F90

@@ -303,7 +303,7 @@ end subroutine set_list_idx
   !------------------------------------------------------------------------------
   ! returns aerosol number, volume concentrations, and bulk hygroscopicity
   !------------------------------------------------------------------------------
-  subroutine loadaer( self, aero_props, istart, istop, k,  m, cs, phase, &
+  subroutine loadaer( self, aero_props, ncol, nlev,  m, cs, phase, &
                        naerosol, vaerosol, hygro, errnum, errstr, pom_hygro)
 
     use aerosol_properties_mod, only: aerosol_properties
@@ -312,17 +312,15 @@ subroutine loadaer( self, aero_props, istart, istop, k,  m, cs, phase, &
     class(aerosol_state), intent(in) :: self
     class(aerosol_properties), intent(in) :: aero_props
 
-    integer,  intent(in) :: istart      ! start column index (1 <= istart <= istop <= pcols)
-    integer,  intent(in) :: istop       ! stop column index
-    integer,  intent(in) :: k           ! level index
+    integer,  intent(in) :: ncol, nlev
     integer,  intent(in) :: m           ! mode or bin index
     real(r8), intent(in) :: cs(:,:)     ! air density (kg/m3)
     integer,  intent(in) :: phase       ! phase of aerosol: 1 for interstitial, 2 for cloud-borne, 3 for sum
 
     ! output arguments
-    real(r8), intent(out) :: naerosol(:)  ! number conc (1/m3)
-    real(r8), intent(out) :: vaerosol(:)  ! volume conc (m3/m3)
-    real(r8), intent(out) :: hygro(:)     ! bulk hygroscopicity of mode
+    real(r8), intent(out) :: naerosol(:,:)  ! number conc (1/m3)
+    real(r8), intent(out) :: vaerosol(:,:)  ! volume conc (m3/m3)
+    real(r8), intent(out) :: hygro(:,:)     ! bulk hygroscopicity of mode
 
     integer ,         intent(out) :: errnum
     character(len=*), intent(out) :: errstr
@@ -335,15 +333,13 @@ subroutine loadaer( self, aero_props, istart, istop, k,  m, cs, phase, &
     real(r8) :: specdens, spechygro
     character(len=aero_name_len) :: spectype
 
-    real(r8) :: vol(istart:istop) ! aerosol volume mixing ratio
-    integer  :: i, l
+    real(r8) :: vol(ncol,nlev) ! aerosol volume mixing ratio
+    integer  :: l
     !-------------------------------------------------------------------------------
     errnum = 0
 
-    do i = istart, istop
-       vaerosol(i) = 0._r8
-       hygro(i)    = 0._r8
-    end do
+    vaerosol(:,:) = 0._r8
+    hygro(:,:)    = 0._r8
 
     do l = 1, aero_props%nspecies(m)
 
@@ -357,59 +353,42 @@ subroutine loadaer( self, aero_props, istart, istop, k,  m, cs, phase, &
        endif
 
        if (phase == 3) then
-          do i = istart, istop
-             vol(i) = max(raer(i,k) + qqcw(i,k), 0._r8)/specdens
-          end do
+          vol(:ncol,:) = max(raer(:ncol,:) + qqcw(:ncol,:), 0._r8)/specdens
        else if (phase == 2) then
-          do i = istart, istop
-             vol(i) = max(qqcw(i,k), 0._r8)/specdens
-          end do
+          vol(:ncol,:) = max(qqcw(:ncol,:), 0._r8)/specdens
        else if (phase == 1) then
-          do i = istart, istop
-             vol(i) = max(raer(i,k), 0._r8)/specdens
-          end do
+          vol(:ncol,:) = max(raer(:ncol,:), 0._r8)/specdens
        else
           errnum = -1
           write(errstr,*)'phase = ',phase,' in aerosol_state::loadaer not recognized'
           return
        end if
 
-       do i = istart, istop
-          vaerosol(i) = vaerosol(i) + vol(i)
-          hygro(i)    = hygro(i) + vol(i)*spechygro
-       end do
-
+       vaerosol(:ncol,:) = vaerosol(:ncol,:) + vol(:ncol,:)
+       hygro(:ncol,:)    = hygro(:ncol,:) + vol(:ncol,:)*spechygro
     end do
 
-    do i = istart, istop
-       if (vaerosol(i) > 1.0e-30_r8) then
-          hygro(i)    = hygro(i)/(vaerosol(i))
-          vaerosol(i) = vaerosol(i)*cs(i,k)
-       else
-          hygro(i)    = 0.0_r8
-          vaerosol(i) = 0.0_r8
-       end if
-    end do
+    where(vaerosol(:ncol,:) > 1.0e-30_r8)
+       hygro(:ncol,:)    = hygro(:ncol,:)/(vaerosol(:ncol,:))
+       vaerosol(:ncol,:) = vaerosol(:ncol,:)*cs(:ncol,:)
+    elsewhere
+       hygro(:ncol,:)    = 0._r8
+       vaerosol(:ncol,:) = 0._r8
+    end where
 
     ! aerosol number mixing ratios (#/kg)
     call self%get_ambient_num(m, raer)
     call self%get_cldbrne_num(m, qqcw)
     if (phase == 3) then
-       do i = istart, istop
-          naerosol(i) = (raer(i,k) + qqcw(i,k))*cs(i,k) ! #/kg -> #/m3
-       end do
+       naerosol(:ncol,:) = (raer(:ncol,:) + qqcw(:ncol,:))*cs(:ncol,:) ! #/kg -> #/m3
     else if (phase == 2) then
-       do i = istart, istop
-          naerosol(i) = qqcw(i,k)*cs(i,k)
-       end do
+       naerosol(:ncol,:) = qqcw(:ncol,:)*cs(:ncol,:)
     else
-       do i = istart, istop
-          naerosol(i) = raer(i,k)*cs(i,k)
-       end do
+       naerosol(:ncol,:) = raer(:ncol,:)*cs(:ncol,:)
     end if
 
     ! adjust number
-    call aero_props%apply_number_limits( naerosol, vaerosol, istart, istop, m )
+    call aero_props%apply_number_limits( naerosol, vaerosol, ncol, nlev, m )
 
   end subroutine loadaer
 

src/chemistry/aerosol/bulk_aerosol_properties_mod.F90

@@ -362,12 +362,12 @@ end function icenuc_updates_mmr
   !------------------------------------------------------------------------------
   ! apply max / min to number concentration
   !------------------------------------------------------------------------------
-  subroutine apply_number_limits( self, naerosol, vaerosol, istart, istop, m )
+  subroutine apply_number_limits( self, naerosol, vaerosol, ncol, nlev, m )
     class(bulk_aerosol_properties), intent(in) :: self
-    real(r8), intent(inout) :: naerosol(:)  ! number conc (1/m3)
-    real(r8), intent(in)    :: vaerosol(:)  ! volume conc (m3/m3)
-    integer,  intent(in) :: istart          ! start column index (1 <= istart <= istop <= pcols)
-    integer,  intent(in) :: istop           ! stop column index
+    real(r8), intent(inout) :: naerosol(:,:)  ! number conc (1/m3)
+    real(r8), intent(in)    :: vaerosol(:,:)  ! volume conc (m3/m3)
+    integer,  intent(in) :: ncol            ! number of columns
+    integer,  intent(in) :: nlev            ! number of vert levels
     integer,  intent(in) :: m               ! mode or bin index
 
     call endrun('ERROR: bulk_aerosol_properties_mod%apply_number_limits not yet implemented')

src/chemistry/aerosol/carma_aerosol_properties_mod.F90

@@ -488,12 +488,12 @@ end function icenuc_updates_mmr
   !------------------------------------------------------------------------------
   ! apply max / min to number concentration
   !------------------------------------------------------------------------------
-  subroutine apply_number_limits( self, naerosol, vaerosol, istart, istop, m )
+  subroutine apply_number_limits( self, naerosol, vaerosol, ncol, nlev, m )
     class(carma_aerosol_properties), intent(in) :: self
-    real(r8), intent(inout) :: naerosol(:)  ! number conc (1/m3)
-    real(r8), intent(in)    :: vaerosol(:)  ! volume conc (m3/m3)
-    integer,  intent(in) :: istart          ! start column index (1 <= istart <= istop <= pcols)
-    integer,  intent(in) :: istop           ! stop column index
+    real(r8), intent(inout) :: naerosol(:,:)  ! number conc (1/m3)
+    real(r8), intent(in)    :: vaerosol(:,:)  ! volume conc (m3/m3)
+    integer,  intent(in) :: ncol            ! number of columns
+    integer,  intent(in) :: nlev            ! number of vert levels
     integer,  intent(in) :: m               ! mode or bin index
 
   end subroutine apply_number_limits