Add GCAM Hector ini & csv tables

[kdorheim]

We want to provide users with the ability to run Hector with a hector_gcam.ini file & the input csv table.

1. a script that uses the ceds by sector data & aggregates to the global total.
2. convert from CEDS units to Hector emission units
   • compare with another table of historical (cmip5 or cmip6 would expect small differences)
3. Format as a Hector csv table csv file
   • may need to add code to pull missing emissions, concentrations, rf etc.
4. Add ini file

Outstanding Questions/Problems

• What do we do have the historical period ends? End the run early? use constant inputs for the remainder of the run?
• For the HFCs & other GHGs/aerosols excluded from the CEDS dataset what should be used?
• What additional radiative forces do we want to include? (land albedo? solar? BC on snow? contrails?)
• how are ffi and luc emissions split up for ceds? It is compatible with Hector?

[kdorheim]

Step 1

• Write a script that reads the global sector data from CEDS, appropriately aggregates it to total global emissions.
• Make a table that converts from CEDS units & variable names to Hector units & variables, it will look something like RCMIP conversion table
• Compare the Hector CEDS emissions to the historical emissions reported in ssp245.csv for the values we do they shouldn't really be large changes. Use the historical ssp45 emissions to check that the units are correct & identity which elements of a Hector csv input table we are missing.