"If stratospheric aerosol injection were used for climate intervention, aircraft passengers would be exposed to the resulting sulfate aerosol cloud. We show here, based on simulations from three Earth system models for a high-latitude low-altitude injection scenario, that for the scenario studied the resulting sulfuric acid concentration inside the cabin would on the average be just below air quality exposure guidelines, but more work is needed to determine how often those levels would be hazardous."

The problem might not be confined to passengers. Ages ago a firm I worked with prepositioned on the Yucatan Peninsula a bunch of vehicles equipped with instrument cabs, each containing a myriad of electronic equipment. During the weeks this equipment was waiting for assignments El Chichón volcano erupted, venting as volcanoes do a lot of sulfate aerosol. Combined with atmospheric humidity this became sulfuric acid aerosol, which infiltrated the instrument cabs and ate up thousands of electrical contacts on PCB edge connectors, cable junctions, etc. The entire fleet was disabled and had to be recalled for refit.

Humidity in aircraft cabins and in general at high altitude is typically very low, so perhaps this wouldn't be a threat? But it seems a good idea to assess that.

#sai
#StratosphericAerosolInjection
#srm

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2026GL122804?af=R