Answers:

1. variant_id
   key-path: model:variant_id
   value: i1p1f1
   purpose: Defines the Variant ID of the model (in CMIP parlance, the
     code to indicate the realisation, initialisation method,
     physics, and forcing).

2. albedo_table
   key-path: components:CanAM:input_files:albedo_table
   value: ${CANAMG_FORCINGS_DIR}/v6_a3/albtable_snow_ghg
   purpose: Defines the path to the input file for the "albedo table";
     this will be used in subsequent database commands (access/save).

3. scheduler
   key-path: machine:batch_commands:scheduler
   value: pbs
   purpose: Defines the scheduler available on the current machine platform.
