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Stratospheric aerosol injection (SAI) is a proposed method of solar geoengineering (or solar radiation modification) to reduce global warming. This would introduce aerosols into the stratosphere to create a cooling effect via global dimming and increased albedo , which occurs naturally from volcanic winter . [ 1 ]
Stratospheric aerosol injection (SAI) is the most studied and has the most cost estimates. UNEP reported a cost of $18 billion per degree, [7]: 32 although individual studies have estimated that SAI deployment could cost between $5 billion to $10 billion per year. [40]
Although there's a popular narrative that stratospheric aerosol injection can be carried out by individuals, small states, or other non-state rogue actors, scientific estimates suggest that cooling the atmosphere by 1 °C (1.8 °F) through stratospheric aerosol injection would cost at least $18 billion annually (at 2020 USD value), meaning that ...
In June 2023 the US government released a report that recommended conducting research on stratospheric aerosol injection and marine cloud brightening. [ 113 ] As of 2024 the Coastal Atmospheric Aerosol Research and Engagement (CAARE) project was launching sea salt into the marine sky in an effort to increase cloud "brightness" (reflective ...
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Stratospheric aerosol injection (climate engineering) ... Space sunshade; Stratospheric Particle Injection for Climate Engineering; ... Wikipedia® is a registered ...
The page Stratospheric Particle Injection for Climate Engineering is about one project started in 2011 that studied the idea of Stratospheric aerosol injection. It repeats some of all ideas here in Stratospheric aerosol injection and then includes additional metrics specific to the SPICE project. The SPICE project no longer seems active so it ...
One proposed method of increasing Earth's albedo is the injection of sulfate aerosols into the stratosphere. [11] Other proposed geoengineering methods to recover arctic ice include pumping seawater on top of existing ice, and covering existing ice with small hollow glass spheres. [11] [10]