CMIP6 Global Attributes
- variant_label
- activity_id
- branch_method
- Conventions
- creation_date
- mip_era
- data_specs_version
- experiment_id
- experiment
- forcing_index
- further_info_url
- frequency
- grid
- grid_label
- nominal_resolution
- initialization_index
- institution
- institution_id
- license
- physics_index
- product
- realization_index
- realm
- variant_label
- source
- source_id
- source_type
- sub_experiment
- sub_experiment_id
- table_id
- tracking_id
- variable_id