add metadata strings to diag fields and units

Author: mjschmidt271

components/eamxx/src/physics/mam/eamxx_mam_microphysics_process_interface.cpp

@@ -219,11 +219,17 @@ void MAMMicrophysics::set_grids(
     // Diagnostics: H2SO4 in-cloud tendencies[kg/kg/s]
     add_field<Computed>("mam4_microphysics_tendency_aqh2so4", vector3d_mid_nmodes, kg / kg / s, grid_name);
 
-    add_field<Computed>("mam4_microphys_tendency_condensation", vector3d_num_gas_aerosol_constituents,  pow(mol, -1), grid_name);
-    add_field<Computed>("mam4_microphys_tendency_renaming", vector3d_num_gas_aerosol_constituents,  pow(mol, -1), grid_name);
-    add_field<Computed>("mam4_microphys_tendency_nucleation", vector3d_num_gas_aerosol_constituents,  pow(mol, -1), grid_name);
-    add_field<Computed>("mam4_microphys_tendency_coagulation", vector3d_num_gas_aerosol_constituents,  pow(mol, -1), grid_name);
-    add_field<Computed>("mam4_microphys_tendency_renaming_cloud_borne", vector3d_num_gas_aerosol_constituents,  pow(mol, -1), grid_name);
+    // constexpr ekat::units::Units u_heterogeneous = ekat::units::Units(ekat::units::Units::nondimensional(), "Warning: This array carries quantities with heterogeneous units");
+    add_field<Computed>("mam4_microphys_tendency_condensation", vector3d_num_gas_aerosol_constituents, pow(mol, -1), grid_name);
+    add_field<Computed>("mam4_microphys_tendency_renaming", vector3d_num_gas_aerosol_constituents, pow(mol, -1), grid_name);
+    add_field<Computed>("mam4_microphys_tendency_nucleation", vector3d_num_gas_aerosol_constituents, pow(mol, -1), grid_name);
+    add_field<Computed>("mam4_microphys_tendency_coagulation", vector3d_num_gas_aerosol_constituents, pow(mol, -1), grid_name);
+    add_field<Computed>("mam4_microphys_tendency_renaming_cloud_borne", vector3d_num_gas_aerosol_constituents, pow(mol, -1), grid_name);
+    // get_field_set_io_docstring("mam4_microphys_tendency_condensation");
+    // get_field_set_io_docstring("mam4_microphys_tendency_renaming");
+    // get_field_set_io_docstring("mam4_microphys_tendency_nucleation");
+    // get_field_set_io_docstring("mam4_microphys_tendency_coagulation");
+    // get_field_set_io_docstring("mam4_microphys_tendency_renaming_cloud_borne");
   }
 
   // Creating a Linoz reader and setting Linoz parameters involves reading data

components/eamxx/src/physics/mam/eamxx_mam_microphysics_process_interface.hpp

@@ -163,6 +163,13 @@ class MAMMicrophysics final : public MAMGenericInterface {
   void init_temporary_views();
   int len_temporary_views_{0};
 
+  void get_field_set_io_docstring(const std::string &fname) {
+    using str_atts_t = std::map<std::string,std::string>;
+    auto &f = get_field_out(fname);
+    auto &io_str_atts = f.get_header().get_extra_data<str_atts_t>("io: string attributes");
+    io_str_atts["doc"] = "Collection of heterogeneous quantities--species have different units";
+  }
+
 };  // MAMMicrophysics
 
 }  // namespace scream