Co2 sinks include: 1.- equilibriation with oceans (10 year timescale increases system capacity by order of magnitude - but harmful to marine life) 2. - hydroc

Co2 sinks include: 1.- equilibriation with oceans (10 year timescale increases system capacity by order of magnitude - but harmful to marine life) 2. - hydrocarbon/peat formation (not really a major process in an icehouse climate and quite slow anyway) 3. - marine carbonate formation (100 year timescale, potentially very large sink, can be negatively affected by process 1) 4.- silicate weathering (1000 year timescale infinite capacity). So rate of release is very important. If CO2 release too fast ocean acidification from 1 prevents 3 and 3 and 4 don't have time to act.