https://arxiv.org/html/2509.24246v1
*Authors: *Taveen Singh Kapoor, Prabhav Upadhyay, Jian Huang, Guodong Ren, John Cavin, Dhruv Mitroo, Joshin Kumar, Jordan A. Hachtel, Lu Xu, Rohan Mishra, Rajan K. Chakrabarty *Abstract* Stratospheric alumina aerosols from rocket launches and geoengineering proposals are presently understood to help counteract greenhouse gas-induced warming by reflecting sunlight and cooling the lower atmosphere. Here, from direct measurement of aerosol absorption cross-sections, we report alumina’s hitherto unknown shortwave absorption characteristics. Alumina’s shortwave absorption could offset up to 10% of its solar-reflective cooling, and if implemented for geoengineering, would warm the stratosphere more than black carbon from rocket launches. *Source: ARXIV* -- 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/CAHJsh98JPEJBrpEWbWF%2B6a6d-zZq0y225ihw2Gi_UNBPA5vbmg%40mail.gmail.com.
