Stratospheric Aerosol Geoengineering

The right dose of geoengineering could reduce climate change risks, study says
Mar 2020, phys.org

Don't act like you didn't know.

Stratospheric aerosol geoengineering is the idea that adding a layer of aerosol particles to the upper atmosphere can reduce climate changes caused by greenhouse gases such as carbon dioxide. 

Previous research shows that solar geoengineering could be achieved using commercially available aircraft technologies to deliver the particles at a cost of a few billion dollars per year and would reduce global average temperatures. However, the question remains whether this approach could reduce important climate hazards at a regional level. 

Results from a new study by UCL and Harvard researchers suggest that even a crude method like injecting sulphur dioxide in the stratosphere could reduce many important climate hazards without making any region obviously worse off. 

"However, if instead only half the warming is offset, then we find that stratospheric aerosol geoengineering could still reduce climate change overall but would only exacerbate change over 1.3% of the land area."

Notes:
'Halving warming with stratospheric aerosol geoengineering moderates policy-relevant climate hazards' , Environmental Research Letters (2020). DOI: 10.1088/1748-9326/ab76de