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Different Tools, Different Properties
- Solar geoengineering (stratospheric aerosols) and carbon removal are distinct with opposite properties and roles.
- Solar geoengineering is cheap and risks being deployed too quickly or excessively if not governed carefully.
Mount Pinatubo As A Natural Experiment
- The 1991 Mount Pinatubo eruption cooled global average temperatures by about 0.5°C and offered real-world data on aerosol cooling.
- Researchers learned effects on temperatures, crops and other systems, showing volcanic eruptions inform geoengineering study.
Study Practical Delivery And Costs
- If researchers consider stratospheric aerosols, they should study delivery via high-altitude aircraft and realistic costs.
- Prepare engineering studies for specially designed high-wing, large-fuselage planes and budget in the low single-digit billions annually for deployment scenarios.