Add CFC to emissions reporting

[jayfuhrman]

Add reporting category for CFC emissions

[danielhuppmann]

Thank you, that looks quite straightforward - will merge once approved by another person from the emissions-team

[gidden]

Thanks @jayfuhrman - just curious, how did you decide on CFC-12 as the common equivalent?

[jayfuhrman]

@gidden my understanding is that and CFC-11 are the most common CFCs

[gidden]

@ssmithClimate do you have a common CFC equivalent in CEDS, or any recommendations for such? thanks!

[ssmithClimate]

No, since CEDS doesn't include CFCs. Hector incorporates CFCs explicitly by gas so we don't have anything like this there either.

[ssmithClimate]

But I suspect Kalyn can point you to those details in Hector, including for future forcing, and you can calculate the CO2eq using whatever GWP basis you want.

[gidden]

for lack of a better approach, I approve!