In mid 2015, we decided to standardize on the global mitigation pathways provided by the Climate Action Tracker (CAT 2.0°C pathway and CAT 1.5°C pathway). As a result, this paper, which describes and analyzes the global emissions pathways that we had previously assembled for the use with the Climate Equity Reference Framework is out-of-date and is currently being reworked.
In the meanwhile, you might want to check out the Climate Action Tracker’s own description of their methodology and of their pathways that we use here.
The original “Three salient global mitigation pathways” paper is still available, and remains a useful reference to our third, least ambitions pathway, the “G8 Pathway”.