There have been volcanic eruptions in the past with a significant co-emission of halogens. See for instance this recent study https://acp.copernicus.org/articles/21/9009/2021/acp-21-9009-2021.html So in a similar case (unlikely but possible) this would matter.
> On 3 Aug 2021, at 18:19, Kevin Lister <kevin.lister2...@gmail.com> wrote: > > > I would doubt that there is enough HCl in the atmosphere to make this a > significant contributor to the overall CO2 imbalance. > >> On Tue, Aug 3, 2021 at 12:29 AM Greg Rau <gh...@sbcglobal.net> wrote: >> 2HCl + CaCO3 ---> CaCl2 + CO2 + H2O. How is this a good thing for GHGs and >> GW? >> Greg >> >> On Monday, August 2, 2021, 03:52:35 PM PDT, Geoeng Info >> <infogeo...@gmail.com> wrote: >> >> >> https://pubs.acs.org/doi/abs/10.1021/acsearthspacechem.1c00151 >> >> Heterogeneous Reactivity of HCl on CaCO3 Aerosols at Stratospheric >> Temperature >> >> Han N. Huynh and V. Faye McNeill >> >> >> Abstract >> Recently proposed as a possible alternative to sulfate particles for >> stratospheric solar radiation management (SSRM), calcite (CaCO3) aerosols >> have been modeled to have minimal negative impact on both stratospheric >> ozone level, through heterogeneous chemistry, and stratospheric temperature. >> However, the heterogeneous chemistry of CaCO3 aerosols with relevant trace >> gases, such as HCl, at stratospheric conditions is still underexamined. We >> studied the kinetics of HCl uptake on airborne CaCO3 aerosols at >> stratospheric temperature, 207 ± 3 K, by performing experiments under dry >> conditions using an aerosol flow tube coupled with a custom-built quadrupole >> chemical ionization mass spectrometer (CIMS) for HCl detection. The reactive >> uptake coefficient for HCl was measured to be 0.076 ± 0.009. This exceeds >> the reactive uptake coefficient of 0.013 ± 0.001 that we previously reported >> for this system at 296 K, consistent with the expected negative temperature >> dependence of gas uptake on solid surfaces. This finding suggests an initial >> strong reactive uptake of HCl gas on CaCO3 aerosol surfaces in the >> stratosphere >> -- >> 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 geoengineering+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/geoengineering/CAKSzgpaROQJnv3ZD0ZqfMcZzegkw492mxCUktv_nnQEN3MLRGA%40mail.gmail.com. >> -- >> 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 geoengineering+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/geoengineering/146902550.2022050.1627946808075%40mail.yahoo.com. > > -- > 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 geoengineering+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/geoengineering/CAE%3DUieymn9iSFu%2BHVS%3Dnse0WXbKnz9pC3MRf0jY0mSprqm8Rbw%40mail.gmail.com. -- 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 geoengineering+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/geoengineering/0F0CAC65-565D-4973-9C58-905FF7F40033%40gmail.com.
