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Geoengineering schemes are entirely novel new forcings, while the impact of atmospheric CO2 can be studied historically. This weakens your contention, but I st
by leot 16y ago
Geoengineering schemes are entirely novel new forcings, while the impact of atmospheric CO2 can be studied historically.
This weakens your contention, but I still think you're pointing out an interesting bit of hypocrisy in the public debate (often these hypocrisies cease to exist in debates among experts).
- yummyfajitas 16y agoWe have historical data on SO2 - basically every volcanic eruption ever. That's actually not a lot of data, but it's considerably more than we know about exogenous inputs of CO2 - we have only one data point on CO2, but a handful on SO2 (Pinatubo, Krakatoa, a few more).