| > we could definitely halt warming in a very short time The limit estimated (from models) here [0] is a decrease of -2 W/m^2 at most. The IPCC scenarios are equivalent with a number of plausible energy imbalances by the end of the century, ranging for 2.6 W/m^2 (RCP 2.6) in the best and 8.5 W/m^2 (RCP 8.5) in the worst case. [1] So even in the best case it might very possibly not be enough to halt everything. Maybe it can buy us some time, but I think the only viable path forward is to stop as soon as possible and then carbon-capture it back. (See also this graphic [2] for possible pathways to stay below 1.5°C warming, all of which include carbon capture, up to half of current emissions starting in 10 years (in the best case by land-use changes, in all others by actively removing the carbon).) [0] https://d-nb.info/1160958696/34 [1] https://www.ipcc.ch/sr15/chapter/chapter-1/ [2] https://www.ipcc.ch/site/assets/uploads/sites/2/2019/02/SPM3... |
