The Royal Society is to hold a meeting on climate feedbacks at the start of December:
The response of Earth’s climate system to a perturbation depends on the sign and strength of several feedback processes. This meeting will present critical assessments of major feedbacks, including those (such as ice sheets and the carbon cycle) operating over long timescales. For each, their role in past and present climate change, and their expected future effects will be discussed.
Details here, including a detailed programme.