https://scitechdaily.com/why-dimming-the-sun-might-be-the-most-dangerous-climate-fix-yet/
*Why “Dimming the Sun” Might Be the Most Dangerous Climate Fix Yet* By Columbia Climate School - October 27, 2025 Le mer. 22 oct. 2025 à 13:31, Geoengineering News < [email protected]> a écrit : > https://www.nature.com/articles/s41598-025-20447-2 > > *Authors: *Miranda Hack, V. Faye McNeill, Dan Steingart & Gernot Wagner > > *21 October 2025* > > *Abstract* > The use of reflective aerosols in the upper atmosphere (stratospheric > aerosol injections, SAI) to limit incoming sunlight has been proposed as a > potential means of countering anthropogenic climate change. Such a strategy > ideates from observed cooling effects due to sulfate aerosol formation > following volcanic eruptions. Solid mineral candidates have been proposed > as a sulfate alternative, potentially lowering environmental risks like > ozone depletion and absorption of radiation. The bulk of SAI modeling > literature focuses on optimal deployment scenarios, in which practical > constraints—microphysical, geopolitical, and economic—are not considered. > Here, we explore several key micro- and macroscopic aspects of deployment > that may directly increase risk, and the degree to which technical and > governance approaches could be levied to offset it. We find that the risk > and design space for SAI may be considerably constrained by factors like > supply chains and governance. Logistical and technical considerations, most > significantly difficulties in dispersing solid aerosols at scale in the > desired size range, and the radiative properties of potentially formed > aggregates, notably introduce uncertainties in the outcomes of solid-based > SAI strategies more so than sulfate. We conclude that the design space for > a “low-risk” SAI strategy, particularly with solid aerosol, may be more > limited than current literature reflects. > > *Source: Scientific Reports* > > -- > You received this message because you are subscribed to the Google Groups > "geoengineering" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/geoengineering/CAHJsh98x8eZpcWtKc5Wi03CdaNFHF03gB0X%2B_99Kdq3-OcxG2A%40mail.gmail.com > <https://groups.google.com/d/msgid/geoengineering/CAHJsh98x8eZpcWtKc5Wi03CdaNFHF03gB0X%2B_99Kdq3-OcxG2A%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/geoengineering/CAHodn99V2CdZvhm%3D%3DQUW0Pskt%2B4iscOw6wnE3bD1Rq%3DBo3PcaQ%40mail.gmail.com.
