A Risk-Based Framework for Assessing the Effectiveness of Stratospheric Aerosol Geoengineering
Figure 3
Fraction of global area, population and GDP affected by different outcomes of geoengineering.
Each climate model simulation has a pair of bars. The left-hand bar shows the ‘benign’ and ‘effective’ outcomes, i.e. where geoengineering reduces risk. The right-hand bar shows the ‘damaging’ and ‘ineffective’ outcomes, i.e. where geoengineering increases risk. Regions where neither the response to 4CO2 or geoengineering are statistically significant at the 95% level are neglected, so the bars do not sum to 1.0.