Two examples I recall are the albedo changes from melting of on-land glaciers and ice-sheets, the IPCC thinks think will take hundreds of years. And then the Me

Two examples I recall are the albedo changes from melting of on-land glaciers and ice-sheets, the IPCC thinks think will take hundreds of years. And then the Methane Clathrate idea, which is very controversial but could contribute to some degree. I don’t think anyone in the world can answer the question about how likely these feedback effects are, unfortunately!