I'm not an expert on atmospheric dynamics, but am aware of some relevant papers in that general direction.
Gao et al. (2021) looked at "practical" SAI using solar powered lofting from black carbon particles, partly inspired by the dynamics seen from large bushfires: https://www.science.org/doi/10.1126/sciadv.abe3416 More broadly related, Christian et al. (2019) looked at the radiative forcing and stratospheric warming impacts of pyrocumulonimbus clouds: https://doi.org/10.1029/2019GL082360 Along the same lines, Peterson et al. (2021) looked specifically at the Black Summer bushfires in Australia from 2019-20: http://www.nature.com/articles/s41612-021-00192-9 Similar methods from those studies would presumably be applicable to studying SAI injection, and/or the potential dynamics between artificially injected sulphur (or other) aerosols with stratospheric warming events, pyroCb clouds and the like. I imagine there would be quite a lot of complexity with potentially compounding effects, maybe increasing aerosol lifetime, mixing and regional hydroclimatic changes, etc. Speaking of which, Simpson et al. (2019) specifically looked at the regional hydroclimatic effects of SAI, and how stratospheric heating plays into it: 10.1029/2019JD031093 <https://doi.org/10.1029/2019JD031093>. My understanding from reading that paper and others is stratospheric heating dynamics of SAI is one of those areas where there's still quite a lot of uncertainty, and an area of active research. Maybe other folks in the group here who have more experience with ESMs and atmospheric dynamics can comment further. I know the perspective paper by Ben Kravitz and Doug MacMartin <http://dx.doi.org/10.1038/s43017-019-0004-7> on uncertainty in solar geo research picked out stratospheric heating impacts on tropospheric and surface climate as one of the key outstanding uncertainties. On Wednesday, 19 October 2022 at 6:35:43 am UTC+11 [email protected] wrote: > Hi all, > Do people know of the impact of stratospheric warming that SRM causes on > the injection of other aerosols into the stratosphere, say from wildfire > events or volcanic eruptions? Like, how does a warm stratosphere effect how > these aerosols rise into the stratosphere and the dynamics of them within > the stratosphere > Best Wishes > Gideon > -- 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 on the web visit https://groups.google.com/d/msgid/geoengineering/7c0da4f8-f39e-41bb-90ba-ad2615ea8a68n%40googlegroups.com.
