Over the last twenty years GCI has made an effort - arguably unequalled by any agency in the entire UNFCCC-process - to elucidate, answer and communicate answers to this point: - what rates of C&C are required for UNFCCC-compliance?
ALL THE C&C REFERENCES FROM GCI [BELOW] STRESS ACCELERATED CONVERGENCE RATES
This is probably one of the most highly cited and referenced sources in the climate debate.
The effort has been made to help [and not prescribe to] negotiators at the UNFCCC on how they might yet come to an effective global agreement. Below are a few examples of GCI's effort to this ranging over the last fifteen years.
Here is a recent example from COP-15 Copenhagen December 2009: -
Current Proposal to UNFCCC on negotiating Convergence Rate here
While some Government and Non-Government actors have over the years, made an insufficient effort to really engage with this, others have chosen to avoid it altogether. However, an increasing number have and are engaging with it now: -