diff --git a/components/eamxx/src/physics/mam/CMakeLists.txt b/components/eamxx/src/physics/mam/CMakeLists.txt
index 6339c85aef0..e4151707753 100644
--- a/components/eamxx/src/physics/mam/CMakeLists.txt
+++ b/components/eamxx/src/physics/mam/CMakeLists.txt
@@ -45,7 +45,6 @@ add_library(mam
   eamxx_mam_optics_process_interface.cpp
   eamxx_mam_dry_deposition_process_interface.cpp
   eamxx_mam_aci_process_interface.cpp)
-
 target_compile_definitions(mam PUBLIC EAMXX_HAS_MAM)
 add_dependencies(mam mam4xx)
 target_include_directories(mam PUBLIC
diff --git a/components/eamxx/src/physics/mam/eamxx_mam_dry_deposition_process_interface.cpp b/components/eamxx/src/physics/mam/eamxx_mam_dry_deposition_process_interface.cpp
index c7f2471c447..ebbab7ab757 100644
--- a/components/eamxx/src/physics/mam/eamxx_mam_dry_deposition_process_interface.cpp
+++ b/components/eamxx/src/physics/mam/eamxx_mam_dry_deposition_process_interface.cpp
@@ -145,7 +145,7 @@ void MAMDryDep::set_grids(
 
   //----------- Variables from other mam4xx processes ------------
   // Geometric mean wet diameter for number distribution [m]
-  add_field<Required>("dgncur_awet", scalar4d_mid, m, grid_name);
+  add_field<Required>("dgnumwet", scalar4d_mid, m, grid_name);
 
   // Wet density of interstitial aerosol [kg/m3]
   add_field<Required>("wetdens", scalar4d_mid, kg / m3, grid_name);
@@ -355,7 +355,6 @@ void MAMDryDep::initialize_impl(const RunType run_type) {
 
 // =========================================================================================
 void MAMDryDep::run_impl(const double dt) {
-
   const auto scan_policy = ekat::ExeSpaceUtils<
       KT::ExeSpace>::get_thread_range_parallel_scan_team_policy(ncol_, nlev_);
 
@@ -368,7 +367,7 @@ void MAMDryDep::run_impl(const double dt) {
   // -------------------------------------------------------------
 
   // Geometric mean wet diameter for number distribution [m]
-  auto dgncur_awet_ = get_field_in("dgncur_awet").get_view<const Real ***>();
+  auto dgncur_awet_ = get_field_in("dgnumwet").get_view<const Real ***>();
   // Wet density of interstitial aerosol [kg/m3]
   auto wet_dens_ = get_field_in("wetdens").get_view<const Real ***>();
   // Obukhov length [m]
@@ -401,10 +400,10 @@ void MAMDryDep::run_impl(const double dt) {
   auto aerdepdryis_ = get_field_out("deposition_flux_of_interstitial_aerosols")
                           .get_view<Real **>();
 
-  //FIXME: remove it if it read from a file
+  // FIXME: remove it if it read from a file
   populated_fraction_landuse(fraction_landuse_, ncol_);
 
-  //Call drydeposition and get tendencies
+  // Call drydeposition and get tendencies
   compute_tendencies(ncol_, nlev_, dt, obukhov_length_,
                      surface_friction_velocty_, land_fraction_, ice_fraction_,
                      ocean_fraction_, friction_velocity_,
diff --git a/components/eamxx/src/physics/mam/impl/compute_water_content.cpp b/components/eamxx/src/physics/mam/impl/compute_water_content.cpp
index 673fe06292e..ea7190afff9 100644
--- a/components/eamxx/src/physics/mam/impl/compute_water_content.cpp
+++ b/components/eamxx/src/physics/mam/impl/compute_water_content.cpp
@@ -23,7 +23,7 @@ void compute_water_content(const mam4::Prognostics &progs, int k,
   // extract aerosol tracers for this level into state_q, which is needed
   // for computing dry aerosol properties below
   // FIXME: we should eliminate this index translation stuff
-  constexpr int nvars = mam4::aero_model::pcnst;
+  constexpr int nvars = aero_model::pcnst;
   Real state_q[nvars]; // aerosol tracers for level k
   for (int imode = 0; imode < num_modes; ++imode) {
     int la, lc; // interstitial and cloudborne indices within state_q
diff --git a/components/eamxx/src/physics/mam/mam_coupling.hpp b/components/eamxx/src/physics/mam/mam_coupling.hpp
index 8e77ae2484b..1e13cece98d 100644
--- a/components/eamxx/src/physics/mam/mam_coupling.hpp
+++ b/components/eamxx/src/physics/mam/mam_coupling.hpp
@@ -251,10 +251,7 @@ const char* cld_aero_mmr_field_name(const int mode, const int species) {
 // mixing ratio field in EAMxx
 KOKKOS_INLINE_FUNCTION
 const char* gas_mmr_field_name(const int gas) {
-  if (!gas_mmr_names(gas)[0]) {
-    concat_2_strings("", gas_species_name(gas), gas_mmr_names(gas));
-  }
-  return gas_mmr_names(gas);
+  return const_cast<const char*>(gas_species_name(gas));
 }
 
 // This type stores multi-column views related specifically to the wet
@@ -351,9 +348,8 @@ struct Buffer {
   // =======================
 
   // number of local fields stored at column interfaces
-  static constexpr int num_2d_iface = 2;
+  static constexpr int num_2d_iface = 1;
 
-  uview_2d p_int; // pressure at interfaces
   uview_2d z_iface; // height at interfaces
 
   // storage
@@ -469,7 +465,6 @@ inline size_t init_buffer(const ATMBufferManager &buffer_manager,
 
   // set view pointers for interface fields
   uview_2d* view_2d_iface_ptrs[Buffer::num_2d_iface] = {
-    &buffer.p_int,
     &buffer.z_iface
   };
   for (int i = 0; i < Buffer::num_2d_iface; ++i) {
@@ -524,8 +519,6 @@ haero::Atmosphere atmosphere_for_column(const DryAtmosphere& dry_atm,
     "cldfrac not defined for dry atmosphere state!");
   EKAT_KERNEL_ASSERT_MSG(dry_atm.w_updraft.data() != nullptr,
     "w_updraft not defined for dry atmosphere state!");
-  EKAT_KERNEL_ASSERT_MSG(dry_atm.p_int.data() != nullptr,
-    "p_int not defined for dry atmosphere state!");
   return haero::Atmosphere(mam4::nlev,
                            ekat::subview(dry_atm.T_mid, column_index),
                            ekat::subview(dry_atm.p_mid, column_index),
@@ -656,11 +649,11 @@ void compute_dry_mixing_ratios(const Team& team,
   int i = column_index;
   Kokkos::parallel_for(Kokkos::TeamVectorRange(team, nlev), [&] (const int k) {
     const auto qv_ik = wet_atm.qv(i,k);
-    dry_atm.qv(i,k) = wet_atm.qv(i,k);//PF::calculate_drymmr_from_wetmmr(wet_atm.qv(i,k), qv_ik);
-    dry_atm.qc(i,k) = wet_atm.qc(i,k);//PF::calculate_drymmr_from_wetmmr(wet_atm.qc(i,k), qv_ik);
-    dry_atm.nc(i,k) = wet_atm.nc(i,k);//PF::calculate_drymmr_from_wetmmr(wet_atm.nc(i,k), qv_ik);
-    dry_atm.qi(i,k) = wet_atm.qi(i,k);//PF::calculate_drymmr_from_wetmmr(wet_atm.qi(i,k), qv_ik);
-    dry_atm.ni(i,k) = wet_atm.ni(i,k);//PF::calculate_drymmr_from_wetmmr(wet_atm.ni(i,k), qv_ik);
+    dry_atm.qv(i,k) = PF::calculate_drymmr_from_wetmmr(wet_atm.qv(i,k), qv_ik);
+    dry_atm.qc(i,k) = PF::calculate_drymmr_from_wetmmr(wet_atm.qc(i,k), qv_ik);
+    dry_atm.nc(i,k) = PF::calculate_drymmr_from_wetmmr(wet_atm.nc(i,k), qv_ik);
+    dry_atm.qi(i,k) = PF::calculate_drymmr_from_wetmmr(wet_atm.qi(i,k), qv_ik);
+    dry_atm.ni(i,k) = PF::calculate_drymmr_from_wetmmr(wet_atm.ni(i,k), qv_ik);
   });
 }
 
@@ -681,21 +674,21 @@ void compute_dry_mixing_ratios(const Team& team,
   Kokkos::parallel_for(Kokkos::TeamVectorRange(team, nlev), [&] (const int k) {
     const auto qv_ik = wet_atm.qv(i,k);
     for (int m = 0; m < num_aero_modes(); ++m) {
-      dry_aero.int_aero_nmr[m](i,k) = wet_aero.int_aero_nmr[m](i,k);//PF::calculate_drymmr_from_wetmmr(wet_aero.int_aero_nmr[m](i,k), qv_ik);
+      dry_aero.int_aero_nmr[m](i,k) = PF::calculate_drymmr_from_wetmmr(wet_aero.int_aero_nmr[m](i,k), qv_ik);
       if (dry_aero.cld_aero_nmr[m].data()) {
-        dry_aero.cld_aero_nmr[m](i,k) = wet_aero.cld_aero_nmr[m](i,k);// PF::calculate_drymmr_from_wetmmr(wet_aero.cld_aero_nmr[m](i,k), qv_ik);
+        dry_aero.cld_aero_nmr[m](i,k) = PF::calculate_drymmr_from_wetmmr(wet_aero.cld_aero_nmr[m](i,k), qv_ik);
       }
       for (int a = 0; a < num_aero_species(); ++a) {
         if (dry_aero.int_aero_mmr[m][a].data()) {
-          dry_aero.int_aero_mmr[m][a](i,k) = wet_aero.int_aero_mmr[m][a](i,k);//PF::calculate_drymmr_from_wetmmr(wet_aero.int_aero_mmr[m][a](i,k), qv_ik);
+          dry_aero.int_aero_mmr[m][a](i,k) = PF::calculate_drymmr_from_wetmmr(wet_aero.int_aero_mmr[m][a](i,k), qv_ik);
         }
         if (dry_aero.cld_aero_mmr[m][a].data()) {
-          dry_aero.cld_aero_mmr[m][a](i,k) = wet_aero.cld_aero_mmr[m][a](i,k);//PF::calculate_drymmr_from_wetmmr(wet_aero.cld_aero_mmr[m][a](i,k), qv_ik);
+          dry_aero.cld_aero_mmr[m][a](i,k) = PF::calculate_drymmr_from_wetmmr(wet_aero.cld_aero_mmr[m][a](i,k), qv_ik);
         }
       }
     }
     for (int g = 0; g < num_aero_gases(); ++g) {
-      dry_aero.gas_mmr[g](i,k) = wet_aero.gas_mmr[g](i,k);//PF::calculate_drymmr_from_wetmmr(wet_aero.gas_mmr[g](i,k), qv_ik);
+      dry_aero.gas_mmr[g](i,k) = PF::calculate_drymmr_from_wetmmr(wet_aero.gas_mmr[g](i,k), qv_ik);
     }
   });
 }
@@ -766,7 +759,7 @@ void copy_view_lev_slice(haero::ThreadTeamPolicy team_policy, //inputs
   const auto PC = mam4::ModeIndex::PrimaryCarbon; \
   const auto NoMode = mam4::ModeIndex::None; \
   static const mam4::ModeIndex mode_for_cnst[gas_pcnst()] = { \
-    NoMode, NoMode, NoMode, NoMode, NoMode, NoMode,                 /* gases (not aerosols) */ \
+    NoMode, NoMode, NoMode, NoMode, NoMode, NoMode, /* gases (not aerosols) */ \
     Accum, Accum, Accum, Accum, Accum, Accum, Accum, Accum,         /* 7 aero species + NMR */ \
     Aitken, Aitken, Aitken, Aitken, Aitken,                         /* 4 aero species + NMR */ \
     Coarse, Coarse, Coarse, Coarse, Coarse, Coarse, Coarse, Coarse, /* 7 aero species + NMR */ \
diff --git a/components/eamxx/src/share/field/field_tag.hpp b/components/eamxx/src/share/field/field_tag.hpp
index e500250b80f..673208d6ae8 100644
--- a/components/eamxx/src/share/field/field_tag.hpp
+++ b/components/eamxx/src/share/field/field_tag.hpp
@@ -34,15 +34,6 @@ enum class FieldTag {
   GaussPoint,
   Component,
   TimeLevel,
-  // Added for RRTMGP, TODO: Revisit this approach, is there a better way than adding more field tags?
-  Gases,
-  ShortWaveBand,
-  ShortWaveGpoint,
-  LongWaveBand,
-  LongWaveGpoint,
-  IsccpTau,
-  IsccpPrs,
-  num_modes
 };
 
 // If using tags a lot, consider adding 'using namespace ShortFieldTagsNames'
@@ -59,15 +50,6 @@ namespace ShortFieldTagsNames {
   constexpr auto LEV  = FieldTag::LevelMidPoint;
   constexpr auto ILEV = FieldTag::LevelInterface;
   constexpr auto CMP  = FieldTag::Component;
-  // Added for rrtmgp - see TODO item above
-  constexpr auto NGAS = FieldTag::Gases;
-  constexpr auto SWBND = FieldTag::ShortWaveBand;
-  constexpr auto LWBND = FieldTag::LongWaveBand;
-  constexpr auto SWGPT = FieldTag::ShortWaveGpoint;
-  constexpr auto LWGPT = FieldTag::LongWaveGpoint;
-  constexpr auto ISCCPTAU = FieldTag::IsccpTau;
-  constexpr auto ISCCPPRS = FieldTag::IsccpPrs;
-  constexpr auto NMODES = FieldTag::num_modes;
 }
 
 inline std::string e2str (const FieldTag ft) {
@@ -98,31 +80,6 @@ inline std::string e2str (const FieldTag ft) {
     case FieldTag::Component:
       name = "dim";
       break;
-    // Added for rrtmgp - see TODO item above
-    case FieldTag::Gases:
-      name = "ngas";
-      break;
-    case FieldTag::ShortWaveBand:
-      name = "swband";
-      break;
-    case FieldTag::ShortWaveGpoint:
-      name = "swgpt";
-      break;
-    case FieldTag::LongWaveBand:
-      name = "lwband";
-      break;
-    case FieldTag::LongWaveGpoint:
-      name = "lwgpt";
-      break;
-    case FieldTag::IsccpTau:
-      name = "ISCCPTAU";
-      break;
-    case FieldTag::IsccpPrs:
-      name = "ISCCPPRS";
-      break;
-    case FieldTag::num_modes:
-      name = "num_modes";
-      break;
     default:
       EKAT_ERROR_MSG("Error! Unrecognized field tag.");
   }
diff --git a/components/eamxx/tests/CMakeLists.txt b/components/eamxx/tests/CMakeLists.txt
index 635f5de80a8..5fd23a41d9d 100644
--- a/components/eamxx/tests/CMakeLists.txt
+++ b/components/eamxx/tests/CMakeLists.txt
@@ -63,7 +63,6 @@ if (NOT DEFINED ENV{SCREAM_FAKE_ONLY})
   set(EAMxx_tests_IC_FILE_72lev         "screami_unit_tests_ne2np4L72_20220822.nc")
   set(EAMxx_tests_IC_FILE_128lev        "screami_unit_tests_ne2np4L128_20220822.nc")
   set(EAMxx_tests_TOPO_FILE             "USGS-gtopo30_ne2np4pg2_x6t_20230331.nc")
-  set(EAMxx_tests_IC_FILE_MAM           "scream_unit_tests_aerosol_optics_ne2np4L72_20220822.nc")
   set(EAMxx_tests_IC_FILE_MAM4xx_72lev  "screami_unit_tests_mam4xx_ne2np4L72_20240329.nc")
 
   # Testing individual atm processes
diff --git a/components/eamxx/tests/single-process/mam/drydep/CMakeLists.txt b/components/eamxx/tests/single-process/mam/drydep/CMakeLists.txt
index 698b9cb7b54..d05e6823642 100644
--- a/components/eamxx/tests/single-process/mam/drydep/CMakeLists.txt
+++ b/components/eamxx/tests/single-process/mam/drydep/CMakeLists.txt
@@ -1,18 +1,19 @@
 include (ScreamUtils)
 
 set (TEST_BASE_NAME mam4_drydep_standalone)
+set (FIXTURES_BASE_NAME ${TEST_BASE_NAME}_generate_output_nc_files)
 
 # Create the test
 CreateADUnitTest(${TEST_BASE_NAME}
   LABELS mam4_drydep physics
   LIBS mam
   MPI_RANKS ${TEST_RANK_START} ${TEST_RANK_END}
+  FIXTURES_SETUP_INDIVIDUAL ${FIXTURES_BASE_NAME}
 )
 
 # Set AD configurable options
-set (ATM_TIME_STEP 3600)
-SetVarDependingOnTestSize(NUM_STEPS 12 24 36)
-SetVarDependingOnTestSize(NUM_STEPS 1 1 1)
+set (ATM_TIME_STEP 1800)
+SetVarDependingOnTestSize(NUM_STEPS 2 5 48)  # 1h 2.5h 24h
 set (RUN_T0 2021-10-12-45000)
 
 ## Copy (and configure) yaml files needed by tests
@@ -24,3 +25,22 @@ configure_file(${CMAKE_CURRENT_SOURCE_DIR}/output.yaml
 # Ensure test input files are present in the data dir
 GetInputFile(scream/init/${EAMxx_tests_IC_FILE_MAM4xx_72lev})
 GetInputFile(cam/topo/${EAMxx_tests_TOPO_FILE})
+
+# Compare output files produced by npX tests, to ensure they are bfb
+include (CompareNCFiles)
+
+CompareNCFilesFamilyMpi (
+  TEST_BASE_NAME ${TEST_BASE_NAME}
+  FILE_META_NAME ${TEST_BASE_NAME}_output.INSTANT.nsteps_x1.npMPIRANKS.${RUN_T0}.nc
+  MPI_RANKS ${TEST_RANK_START} ${TEST_RANK_END}
+  LABELS mam4_drydep physics
+  META_FIXTURES_REQUIRED ${FIXTURES_BASE_NAME}_npMPIRANKS_omp1
+)
+
+if (SCREAM_ENABLE_BASELINE_TESTS)
+  # Compare one of the output files with the baselines.
+  # Note: one is enough, since we already check that np1 is BFB with npX
+  set (OUT_FILE ${TEST_BASE_NAME}_output.INSTANT.nsteps_x1.np${TEST_RANK_END}.${RUN_T0}.nc)
+  CreateBaselineTest(${TEST_BASE_NAME} ${TEST_RANK_END} ${OUT_FILE} ${FIXTURES_BASE_NAME}) 
+endif()
+
diff --git a/components/eamxx/tests/single-process/mam/drydep/input.yaml b/components/eamxx/tests/single-process/mam/drydep/input.yaml
index a95faf9047a..1de57ad7e68 100644
--- a/components/eamxx/tests/single-process/mam/drydep/input.yaml
+++ b/components/eamxx/tests/single-process/mam/drydep/input.yaml
@@ -23,11 +23,20 @@ grids_manager:
 
 initial_conditions:
   # The name of the file containing the initial conditions for this test.
-  Filename: /qfs/people/sing201/eagles/refactor_mam/mam4xx_scream/3src/screami_unit_tests_mam4xx_ne2np4L72_LAT_m38.0068938875434_LON_16p9323465700125_DRYDEP.nc
+  Filename: ${SCREAM_DATA_DIR}/init/${EAMxx_tests_IC_FILE_MAM4xx_72lev}
   topography_filename: ${TOPO_DATA_DIR}/${EAMxx_tests_TOPO_FILE}
   fraction_landuse: 0.2
   w_updraft: 1e-5
   pbl_height: 0.0
+  Obukhov_length: -0.48167567011091336E+002
+  friction_velocity: 0.47569674433601039E+000
+  land_fraction: 0.14675684171817760E+000
+  ice_fraction: 0.00000000000000000E+000
+  ocean_fraction: 0.85324315828182240E+000
+  surface_friction_velocty: 0.27482164092221828E+000
+  aerodynamical_resistance: 0.45506166067091662E+002
+  dgnumwet: 0.41417721820867320E-007
+  wetdens: 0.15100083211582764E+004
 
 # The parameters for I/O control
 Scorpio:
diff --git a/components/eamxx/tests/single-process/mam/drydep/output.yaml b/components/eamxx/tests/single-process/mam/drydep/output.yaml
index e900bb80434..6d8a79e8fe0 100644
--- a/components/eamxx/tests/single-process/mam/drydep/output.yaml
+++ b/components/eamxx/tests/single-process/mam/drydep/output.yaml
@@ -2,10 +2,63 @@
 ---
 filename_prefix: mam4_drydep_standalone_output
 Averaging Type: Instant
-Field Names:
-  - T_mid
+Fields:
+  Physics:
+    Field Names:
+      - bc_a1
+      - bc_a3
+      - bc_a4
+      - dst_a1
+      - dst_a3
+      - so4_a1
+      - so4_a2
+      - so4_a3
+      - pom_a1
+      - pom_a3
+      - pom_a4
+      - soa_a1
+      - soa_a2
+      - soa_a3
+      - nacl_a1
+      - nacl_a2
+      - nacl_a3
+      - mom_a1
+      - mom_a2
+      - mom_a3
+      - mom_a4
+      - num_a1
+      - num_a2
+      - num_a3
+      - num_a4
+      - bc_c1
+      - bc_c3
+      - bc_c4
+      - dst_c1
+      - dst_c3
+      - so4_c1
+      - so4_c2
+      - so4_c3
+      - pom_c1
+      - pom_c3
+      - pom_c4
+      - soa_c1
+      - soa_c2
+      - soa_c3
+      - nacl_c1
+      - nacl_c2
+      - nacl_c3
+      - mom_c1
+      - mom_c2
+      - mom_c3
+      - mom_c4
+      - num_c1
+      - num_c2
+      - num_c3
+      - num_c4
+      - deposition_flux_of_cloud_borne_aerosols
+      - deposition_flux_of_interstitial_aerosols
+      
 output_control:
   Frequency: 1
   frequency_units: nsteps
-  MPI Ranks in Filename: true
 ...