Study Suggests 'Atmospheric Scrubbing' Could Reduce Effectiveness of Stratospheric Aerosol Injection
Researchers have identified a mechanism called 'atmospheric scrubbing' that could diminish the cooling effects of stratospheric aerosol injection, a proposed solar geoengineering technique. Stratospheric aerosol injection involves injecting particles into the upper atmosphere to reflect sunlight and reduce global warming. The finding raises important questions about the effectiveness and governance of potential future climate intervention technologies.
A new study has identified a phenomenon termed 'atmospheric scrubbing' that could reduce the cooling benefits of stratospheric aerosol injection, one of the most prominent solar geoengineering proposals under consideration. Stratospheric aerosol injection works by introducing reflective particles into the upper atmosphere to deflect incoming solar radiation and mitigate warming. The discovery of this atmospheric scrubbing mechanism suggests that the technique may be less effective than previously modeled, as natural atmospheric processes could remove or diminish the injected particles' cooling effects. This finding has broader implications for how climate intervention technologies might be regulated and governed internationally. The research highlights the complexity of large-scale geoengineering approaches and the need for careful evaluation before any deployment.
Limitations & open questions
The article does not provide specific details about the study's methodology, the magnitude of the atmospheric scrubbing effect, or which research institution conducted the work. The mechanisms by which atmospheric scrubbing occurs and the timescale over which it operates are not explained.
What different sources said
- Phys.orgCenter
'Atmospheric scrubbing' could reduce cooling effects of stratospheric aerosol injections
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