cam6_4_188: Move microp_aero (BAM: ndrop_bam, nucleate_ice, interstitials) to atmos_phys

.gitmodules

@@ -29,7 +29,7 @@
 [submodule "atmos_phys"]
 	path = src/atmos_phys
 	url = https://github.com/ESCOMP/atmospheric_physics
-	fxtag = atmos_phys0_24_000
+	fxtag = atmos_phys0_26_000
         fxrequired = AlwaysRequired
         fxDONOTUSEurl = https://github.com/ESCOMP/atmospheric_physics
 

bld/build-namelist

@@ -3435,7 +3435,6 @@ if ($cfg->get('microphys') =~ /^mg/) {
 }
 
 # Aerosol Namelist options
-add_default($nl, 'microp_aero_bulk_scale');
 add_default($nl, 'microp_aero_npccn_scale');
 add_default($nl, 'microp_aero_wsub_scale');
 add_default($nl, 'microp_aero_wsubi_scale');

bld/configure

@@ -2198,6 +2198,7 @@ sub write_filepath
     print $fh "$camsrcdir/src/atmos_phys/schemes/holtslag_boville\n";
     print $fh "$camsrcdir/src/atmos_phys/schemes/bretherton_park\n";
     print $fh "$camsrcdir/src/atmos_phys/schemes/beljaars_drag\n";
+    print $fh "$camsrcdir/src/atmos_phys/schemes/microp_aero\n";
 
     # Dynamics package and test utilities
     print $fh "$camsrcdir/src/dynamics/$dyn\n";

bld/namelist_files/namelist_defaults_cam.xml

@@ -2421,8 +2421,6 @@
 <micro_mg_autocon_lwp_exp microphys="mg2" >  2.47D0    </micro_mg_autocon_lwp_exp>
 <micro_mg_autocon_lwp_exp phys="cam7"     >  2.37D0    </micro_mg_autocon_lwp_exp>
 
-<microp_aero_bulk_scale                  >  2.D0    </microp_aero_bulk_scale>
-
 <microp_aero_npccn_scale                  >  1.D0    </microp_aero_npccn_scale>
 <microp_aero_npccn_scale microphys="mg2"  >  1.D0    </microp_aero_npccn_scale>
 

bld/namelist_files/namelist_definition.xml

@@ -3051,12 +3051,6 @@ Default: .true.
 
 
 <!-- Aerosol microphysics -->
-<entry id="microp_aero_bulk_scale" type="real" category="microphys"
-       group="microp_aero_nl" valid_values="" >
-prescribed aerosol bulk sulfur scale factor
-Default: 2
-</entry>
-
 <entry id="microp_aero_npccn_scale" type="real" category="microphys"
        group="microp_aero_nl" valid_values="" >
 Unitless scaling factor for the activated number concentration of cloud condensation nuclei.

doc/ChangeLog

@@ -1,3 +1,216 @@
+===============================================================
+
+Tag name: cam6_4_188
+Originator(s): jimmielin
+Date: July 20, 2026
+One-line Summary: Move microp_aero (BAM: ndrop_bam, nucleate_ice, interstitials) to atmos_phys
+Github PR URL: https://github.com/ESCOMP/CAM/pull/1579
+
+Purpose of changes (include the issue number and title text for each relevant GitHub issue):
+- Closes #1526
+- Moves parts of `microp_aero` (nucleate_ice, ndrop_bam, interstitials) to atmospheric_physics
+- Unify the BAM and MAM/CARMA paths for `nucleate_ice_cam`.
+- Adds a new `aero_host_binding_t` type to remove `state` and `pbuf` from being directly contained within the abstract aerosol interface (`*_aerosol_state`), so CAM and CAM-SIMA code are less divergent with each other.
+
+Describe any changes made to build system: add microp_aero build path from atmos_phys.
+
+Describe any changes made to the namelist: remove microp_aero_bulk_scale which was fixed to 2.
+
+List any changes to the defaults for the boundary datasets: N/A
+
+Describe any substantial timing or memory changes: N/A
+
+Code reviewed by: fvitt, nusbaume (atmos_phys), cacraig (CAM)
+
+List all files eliminated:
+D       src/physics/cam/ndrop_bam.F90
+D       src/physics/cam/nucleate_ice.F90
+  - moved to atmospheric_physics.
+
+List all files added and what they do:
+
+List all existing files that have been modified, and describe the changes:
+M       src/physics/cam/microp_aero.F90
+  - refactor to use CCPPized interstitial schemes.
+  - move ndrop_bam to atmos_phys.
+
+M       src/physics/cam/nucleate_ice_cam.F90
+  - unify BAM path with MAM/CARMA via the abstract interface.
+
+R079    src/physics/cam/aerosol_mmr_cam.F90     src/physics/cam/aerosol_mmr_host.F90
+  - rename so CAM-SIMA can have the same name
+  - add aero_host_binding_t to contain host data structures and further unify code.
+
+M       bld/build-namelist
+M       bld/namelist_files/namelist_defaults_cam.xml
+M       bld/namelist_files/namelist_definition.xml
+  - remove microp_aero_bulk_scale which was always set to 2.
+
+M       bld/configure
+  - add atmos_phys microp_aero subdirectory.
+
+M       .gitmodules
+M       src/atmos_phys
+  - update to atmos_phys0_26_000 (microp_aero: ndrop_bam, nucleate_ice, interstitials).
+
+M       src/chemistry/aerosol/aerosol_instances_mod.F90
+  - now use aero_host_binding_t to store state, pbuf in aerosol state.
+
+M       src/chemistry/aerosol/aerosol_state_mod.F90
+  - add ncol to aerosol_state.
+
+M       src/chemistry/aerosol/bulk_aerosol_properties_mod.F90
+  - implement apply_number_limits (does nothing by definition)
+
+M       src/chemistry/aerosol/bulk_aerosol_state_mod.F90
+  - use aero_host_binding_t
+  - implements number concentrations derived from mass by assumption built in
+    microp_aero (for ice nucleation)
+
+M       src/chemistry/aerosol/carma_aerosol_state_mod.F90
+M       src/chemistry/aerosol/modal_aerosol_state_mod.F90
+  - use aero_host_binding_t
+  - not fully portable yet because accesses pbuf for DGNUM, etc.
+
+M       src/chemistry/aerosol/radiative_aerosol.F90
+  - comment updates to sync up with CAM-SIMA
+  - remove REMOVECAM guards now that the host module is generic
+
+M       src/chemistry/aerosol/radiative_aerosol_definitions.F90
+  - use 256 instead of shr_kind_cl=256 for CAM-SIMA / CCPP compatibility
+  - add type initializations for safety
+
+M       src/chemistry/carma_aero/aero_model.F90
+M       src/physics/cam/phys_debug.F90
+M       src/physics/cam/rad_constituents.F90
+M       src/physics/cam/radiation_data.F90
+M       src/physics/camrt/radiation.F90
+M       src/physics/rrtmg/radiation.F90
+M       src/physics/rrtmgp/radiation.F90
+  - rename aerosol_mmr_cam -> aerosol_mmr_host
+
+M       src/chemistry/aerosol/aero_wetdep_cam.F90
+  - get persistent aerosol properties from the instances module, skipping BAM
+    (wetdep does not support BAM).
+
+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:
+  ERC_D_Ln9.f09_f09_mt232.FHIST_BDRD.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  ERC_D_Ln9.f19_f19_mg17.QPMOZ.derecho_intel.cam-outfrq3s (Overall: NLFAIL) details:
+  ERC_D_Ln9.f19_f19_mt232.QPC6.derecho_intel.cam-outfrq3s_cosp (Overall: NLFAIL) details:
+  ERC_D_Ln9.mpasa120_mpasa120.F2000climo.derecho_intel.cam-outfrq9s_mpasa120 (Overall: NLFAIL) details:
+  ERC_D_Ln9.mpasa120_mpasa120.FHISTC_LTso.derecho_intel.cam-outfrq9s_mpasa120 (Overall: NLFAIL) details:
+  ERC_D_Ln9.mpasa120_mpasa120.QPC7.derecho_intel.cam-outfrq9s_mpasa120 (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne30pg2_ne30pg2_mt232.QPC7.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne30pg3_ne30pg3_mt232.F1850C_LTso.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne3_ne3_mg37.QPC7.derecho_intel.cam-outfrq9s_rttov (Overall: NLFAIL) details:
+  ERC_Ln9.C96_C96_mt232.F2000climo.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  ERI_D_Ln18.f09_f09_mt232.FHIST.derecho_intel.cam-outfrq3s_eri (Overall: NLFAIL) details:
+  ERI_D_Ln18.f19_f19_mt232.FHIST_C5.derecho_intel.cam-outfrq3s_eri (Overall: NLFAIL) details:
+  ERI_D_Ln18.ne16pg3_ne16pg3_mt232.FHIST_C4.derecho_intel.cam-outfrq3s_eri (Overall: NLFAIL) details:
+  ERI_D_Ln18.ne30pg3_ne30pg3_mt232.FHISTC_LTso.derecho_intel.cam-outfrq3s_eri (Overall: NLFAIL) details:
+  ERP_D_Ln9.ne30pg3_ne30pg3_mt232.F1850C_MTso.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  ERP_D_Ln9_P64x2.f09_f09_mg17.QSC6.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  ERP_Ld3.ne16pg3_ne16pg3_mg17.FHISTC_WAt1ma.derecho_intel.cam-reduced_hist1d (Overall: NLFAIL) details:
+  ERP_Ld3.ne30pg3_ne30pg3_mt232.FHISTC_MTt4s.derecho_intel.cam-outfrq1d_aoa (Overall: NLFAIL) details:
+  ERP_Lh12.f19_f19_mg17.FW4madSD.derecho_intel.cam-outfrq3h (Overall: NLFAIL) details:
+  ERP_Ln9.f09_f09_mg17.FCSD_HCO.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  ERP_Ln9.f19_f19_mg17.FWsc1850.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  ERP_Ln9.ne30pg3_ne30pg3_mg17.FCnudged.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  ERP_Ln9.ne30pg3_ne30pg3_mg17.FHISTC_WAma.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  ERR_Ln9.ne16pg3_ne16pg3_mt232.FHISTC_LTso.derecho_intel.cam-outfrq9s_bwic (Overall: NLFAIL) details:
+  ERS_Ln9.f09_f09_mg17.FX2000.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  ERS_Ln9.f19_f19_mg17.FXSD.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  ERS_Ln9.ne30pg3_ne30pg3_mg17.FHISTC_WXma.derecho_intel.cam-outfrq9s_ctem (Overall: NLFAIL) details:
+  SCT_D_Ln7.ne3_ne3_mg37.QPC5.derecho_intel.cam-scm_prep (Overall: NLFAIL) details:
+  SMS_C2_D_Ln9.ne16pg3_ne16pg3_mg17.FHISTC_WXma.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  SMS_D_Ld5.f09_f09_mt232.PC6.derecho_intel.cam-cam6_port_f09 (Overall: NLFAIL) details:
+  SMS_D_Ld5.f19_f19_mt232.PC4.derecho_intel.cam-cam4_port5d (Overall: NLFAIL) details:
+  SMS_D_Ln9.f09_f09_mg17.FCts2nudged.derecho_intel.cam-outfrq9s_leapday (Overall: NLFAIL) details:
+  SMS_D_Ln9.f09_f09_mg17.FCvbsxHIST.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  SMS_D_Ln9.f09_f09_mg17.FSD.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  SMS_D_Ln9.f19_f19_mg17.FCARMA2000climo.derecho_intel.cam-outfrq9s_carma_rad_diag (Overall: NLFAIL) details:
+  SMS_D_Ln9.f19_f19_mg17.FCHIST_SLH.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  SMS_D_Ln9.f19_f19_mg17.FWma2000climo.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  SMS_D_Ln9.f19_f19_mg17.FWma2000climo.derecho_intel.cam-outfrq9s_waccm_ma_mam4 (Overall: NLFAIL) details:
+  SMS_D_Ln9.f19_f19_mg17.QPC2000climo.derecho_intel.cam-outfrq3s_usecase (Overall: NLFAIL) details:
+  SMS_D_Ln9.f19_f19_mt232.FHIST_C5.derecho_intel.cam-mam7 (Overall: NLFAIL) details:
+  SMS_D_Ln9.ne0ARCTICne30x4_ne0ARCTICne30x4_mt12.FHIST.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  SMS_D_Ln9.ne16_ne16_mg17.QPX2000.derecho_intel.cam-outfrq9s_amie (Overall: NLFAIL) details:
+  SMS_D_Ln9.ne30pg3_ne30pg3_mt232.1850_CAM70%MT%CT4S2_CLM60%SP_CICE%PRES_DOCN%DOM_MOSART_SGLC_SWAV_SESP.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  SMS_D_Ln9.ne30pg3_ne30pg3_mt232.FHISTC_MTso.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  SMS_D_Ln9_P1280x1.ne30pg3_ne30pg3_mt232.FHISTC_MTt1s.derecho_intel.cam-outfrq9s_Leung_dust (Overall: NLFAIL) details:
+  SMS_D_Ln9_P1536x1.ne0CONUSne30x8_ne0CONUSne30x8_mt12.FCHIST.derecho_intel.cam-outfrq9s (Overall: NLFAIL) details:
+  SMS_Ld1.f09_f09_mg17.FCHIST_GC.derecho_intel.cam-outfrq1d (Overall: NLFAIL) details:
+  SMS_Ld1.f09_f09_mg17.FW2000climo.derecho_intel.cam-outfrq1d (Overall: NLFAIL) details:
+  SMS_Ld1.ne30pg3_ne30pg3_mg17.FC2010climo.derecho_intel.cam-outfrq1d (Overall: NLFAIL) details:
+  SMS_Lh12.f09_f09_mg17.FCSD_HCO.derecho_intel.cam-outfrq3h (Overall: NLFAIL) details:
+  SMS_Ln9.f09_f09_mg17.F2010climo.derecho_intel.cam-nudging (Overall: NLFAIL) details:
+  SMS_Ln9.f09_f09_mg17.FW1850.derecho_intel.cam-reduced_hist3s (Overall: NLFAIL) details:
+  SMS_Ln9.f19_f19_mt232.F2000climo.derecho_intel.cam-silhs (Overall: NLFAIL) details:
+  SMS_Ln9.ne30pg3_ne30pg3_mg17.FW2000climo.derecho_intel.cam-outfrq9s_rrtmgp (Overall: NLFAIL) details:
+  - NLFAIL due to removed variable: 'microp_aero_bulk_scale'
+
+derecho/nvhpc/aux_cam:
+  ERS_Ln9.ne30pg3_ne30pg3_mt232.FHISTC_LTso.derecho_nvhpc.cam-outfrq9s_gpu_default (Overall: NLFAIL) details:
+  - NLFAIL due to removed variable: 'microp_aero_bulk_scale'
+
+izumi/nag/aux_cam:
+  ERC_D_Ln9.f10_f10_mt232.FHIST_C5.izumi_nag.cam-outfrq3s_subcol (Overall: FAIL) details:
+    FAIL ERC_D_Ln9.f10_f10_mt232.FHIST_C5.izumi_nag.cam-outfrq3s_subcol NLCOMP
+    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
+
+  ERC_D_Ln27.ne3pg3_ne3pg3_mt232.FKESSLER.izumi_nag.cam-outfrq9s (Overall: NLFAIL) details:
+  ERC_D_Ln9.f10_f10_mg37.QPWmaC6.izumi_nag.cam-outfrq3s (Overall: NLFAIL) details:
+  ERC_D_Ln9.f10_f10_mt232.FHIST.izumi_nag.cam-outfrq3s_cospsathist (Overall: NLFAIL) details:
+  ERC_D_Ln9.mpasa480_mpasa480_mt232.FHS94.izumi_nag.cam-outfrq9s (Overall: NLFAIL) details:
+  ERC_D_Ln9.mpasa480_mpasa480_mt232.QPC7.izumi_nag.cam-outfrq9s_mpasa480 (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne3pg3_ne3pg3_mt232.FHISTC_LTso.izumi_nag.cam-cosp_rad_diags (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne3pg3_ne3pg3_mt232.FHISTC_LTso.izumi_nag.cam-outfrq9s_nochem (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne3pg3_ne3pg3_mt232.QPC4.izumi_nag.cam-outfrq9s (Overall: NLFAIL) details:
+  ERC_D_Ln9_P1x1.ne3pg3_ne3pg3_mt232.FADIAB.izumi_nag.cam-outfrq9s (Overall: NLFAIL) details:
+  SMS_D_Ld2.f45_f45_mg37.PC5.izumi_nag.cam-outfrq24h_port (Overall: NLFAIL) details:
+  SMS_D_Ln3.ne5pg3_ne5pg3_mg37.QPX2000.izumi_nag.cam-outfrq3s (Overall: NLFAIL) details:
+  SMS_D_Ln6.ne5_ne5_mg37.QPWmaC4.izumi_nag.cam-outfrq3s_physgrid_tem (Overall: NLFAIL) details:
+  SMS_D_Ln9.f10_f10_mt232.F1850.izumi_nag.cam-outfrq9s (Overall: NLFAIL) details:
+  SMS_D_Ln9.ne3pg3_ne3pg3_mt232.QPC7.izumi_nag.cam-carma_test_tracers (Overall: NLFAIL) details:
+  TMC_D_Ln9.f10_f10_mt232.FHIST_C5.izumi_nag.cam-mc_ttrac (Overall: NLFAIL) details:
+  - NLFAIL due to removed variable: 'microp_aero_bulk_scale'
+
+izumi/gnu/aux_cam:
+  ERC_D_Ln9.C48_C48_mg17.QPC6.izumi_gnu.cam-outfrq9s (Overall: NLFAIL) details:
+  ERC_D_Ln9.f10_f10_mg37.QPC4.izumi_gnu.cam-outfrq3s_diags (Overall: NLFAIL) details:
+  ERC_D_Ln9.f10_f10_mt232.FHIST_C5.izumi_gnu.cam-rad_diag (Overall: NLFAIL) details:
+  ERC_D_Ln9.f19_f19_mt232.FHIST.izumi_gnu.cam-lonlat_fv_diags (Overall: NLFAIL) details:
+  ERC_D_Ln9.mpasa480_mpasa480_mt232.FHISTC_LTso.izumi_gnu.cam-outfrq9s_mpasa480 (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne3pg3_ne3pg3_mt232.F1850_C4.izumi_gnu.cam-co2rmp (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne3pg3_ne3pg3_mt232.FGRAYRAD.izumi_gnu.cam-outfrq9s (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne3pg3_ne3pg3_mt232.FHIST_C5.izumi_gnu.cam-carma_cosp_rad_diag_mam (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne3pg3_ne3pg3_mt232.FHISTC_LTso.izumi_gnu.cam-sat_lcltod (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne3pg3_ne3pg3_mt232.FHIST.izumi_gnu.cam-nochem_clubbmf (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne3pg3_ne3pg3_mt232.FTJ16.izumi_gnu.cam-outfrq9s (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne3pg3_ne3pg3_mt232.QPC5.izumi_gnu.cam-outfrq9s (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne3pg3_ne3pg3_mt232.QPC7.izumi_gnu.cam-outfrq9s (Overall: NLFAIL) details:
+  ERC_D_Ln9.ne5_ne5_mg37.QPC4.izumi_gnu.cam-outfrq3s_nudging_ne5_L26 (Overall: NLFAIL) details:
+  ERS_Ln9_P24x1.mpasa480_mpasa480.F2000climo.izumi_gnu.cam-outfrq9s_mpasa480 (Overall: NLFAIL) details:
+  PLB_D_Ln9.f10_f10_mt232.FHIST_C5.izumi_gnu.cam-ttrac_loadbal0 (Overall: NLFAIL) details:
+  PLB_D_Ln9.f10_f10_mt232.FHIST_C5.izumi_gnu.cam-ttrac_loadbal1 (Overall: NLFAIL) details:
+  PLB_D_Ln9.f10_f10_mt232.FHIST_C5.izumi_gnu.cam-ttrac_loadbal3 (Overall: NLFAIL) details:
+  SCT_D_Ln7.ne3_ne3_mg37.QPC6.izumi_gnu.cam-scm_prep_c6 (Overall: NLFAIL) details:
+  SMS_D_Ln3.f10_f10_mg37.QPMOZ.izumi_gnu.cam-outfrq3s_chemproc (Overall: NLFAIL) details:
+  SMS_D_Ln3.ne3pg3_ne3pg3_mt232.PC7.izumi_gnu.cam-pc7_ne3pg3 (Overall: NLFAIL) details:
+  SMS_D_Ln9.f10_f10_mg37.FWmaHIST.izumi_gnu.cam-outfrq9s_mee_fluxes (Overall: NLFAIL) details:
+  SMS_D_Ln9.f10_f10_mg37.QPWmaC4.izumi_gnu.cam-outfrq9s_apmee (Overall: NLFAIL) details:
+  SMS_D_Ln9.f19_f19_mt232.FW4madSD.izumi_gnu.cam-outfrq9s (Overall: NLFAIL) details:
+  SUB_D_Ln9.ne3pg3_ne3pg3_mt232.FHIST.izumi_gnu.cam-outfrq9s (Overall: NLFAIL) details:
+  - NLFAIL due to removed variable: 'microp_aero_bulk_scale'
+
+Summarize any changes to answers: B4B
 
 ===============================================================
 

src/chemistry/aerosol/aero_wetdep_cam.F90

@@ -16,12 +16,8 @@ module aero_wetdep_cam
   use cam_history,   only: addfld, add_default, horiz_only, outfld
   use wetdep,        only: wetdep_init
 
-  use radiative_aerosol, only: rad_aer_get_info
-
   use aerosol_properties_mod, only: aero_name_len
   use aerosol_properties_mod, only: aerosol_properties
-  use modal_aerosol_properties_mod, only: modal_aerosol_properties
-  use carma_aerosol_properties_mod, only: carma_aerosol_properties
 
   use aerosol_state_mod, only: aerosol_state, ptr2d_t
   use aerosol_instances_mod, only: aerosol_instances_get_state, &
@@ -66,8 +62,6 @@ module aero_wetdep_cam
   real(r8),allocatable :: scavimptblnum(:,:)
   real(r8),allocatable :: scavimptblvol(:,:)
 
-  integer :: nmodes=0
-  integer :: nbins=0
   integer :: nspec_max=0
   integer :: nele_tot            ! total number of aerosol elements
   class(aerosol_properties), pointer :: aero_props=>null()
@@ -158,8 +152,9 @@ subroutine aero_wetdep_init( )
     logical  :: history_aerosol ! Output MAM or SECT aerosol tendencies
     logical  :: history_chemistry
 
-    integer :: l,m, id, astat
+    integer :: l, m, id, astat, iaermod
     character(len=2) :: binstr
+    class(aerosol_properties), pointer :: props_tmp
 
     fracis_idx = pbuf_get_index('FRACIS')
     rprddp_idx      = pbuf_get_index('RPRDDP')
@@ -173,21 +168,21 @@ subroutine aero_wetdep_init( )
                       history_chemistry_out=history_chemistry, &
                       convproc_do_aer_out = convproc_do_aer)
 
-    call rad_aer_get_info(0, nmodes=nmodes, nbins=nbins)
-
-    if (nmodes>0) then
-       aero_props => modal_aerosol_properties()
-       if (.not.associated(aero_props)) then
-          call endrun(subrname//' : construction of aero_props modal_aerosol_properties object failed')
-       end if
-    else if (nbins>0) then
-       aero_props => carma_aerosol_properties()
-       if (.not.associated(aero_props)) then
-          call endrun(subrname//' : construction of aero_props carma_aerosol_properties object failed')
+    ! get the persistent properties for the aerosol model wetdep is working on
+    ! (wetdep does not work with BAM)
+    nullify(aero_props)
+    do iaermod = 1, aerosol_instances_get_num_models()
+       props_tmp => aerosol_instances_get_props(iaermod, 0)
+       if (associated(props_tmp)) then
+          if (.not. props_tmp%model_is('BAM')) then
+             aero_props => props_tmp
+             exit
+          end if
        end if
-    else
-       call endrun(subrname//' : cannot determine aerosol model')
-    endif
+    end do
+    if (.not.associated(aero_props)) then
+       call endrun(subrname//' : no non-BAM aerosol properties instance available')
+    end if
 
     nele_tot = aero_props%ncnst_tot()