https://www.essoar.org/doi/abs/10.1002/essoar.10503509.1
Reduced poleward transport due to stratospheric heating under geoengineering Authors Daniele Visioni iD Isla Ruth Simpson iD Douglas G MacMartin iD Jadwiga H. Richter Ben Kravitz iD Walker Lee See all authors Published Online:Sun, 5 Jul 2020 DOI:https://doi.org/10.1002/essoar.10503509.1 Download PDF About Tools Abstract By injecting SO2 into the stratosphere at different latitudes, it might be possible to reduce global mean surface temperature and to minimize changes in the equator-to-pole and inter-hemispheric gradients, reducing some of the impacts arising from climate change relative to equatorial SO2 injection. This can happen only if the resulting aerosols are transported to higher latitudes by the stratospheric circulation, ensuring that a greater part of the solar radiation is reflected back to space at higher latitudes, compensating for the reduced sunlight there. However, the stratospheric heating produced by these aerosols modifies the global circulation and strengthens the stratospheric polar vortex that acts as a barrier to the transport of air towards the poles. We show how this heating results in a nonlinear feedback where increasing injection rates lead to a stronger high latitudinal transport barrier. This implies a potential limitation in the high-latitude aerosol burden and subsequent high-latitude cooling. -- 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/CAJ3C-04RuPWSxiuaU-NpoMLZJJ6ZcwpyELp5vrKHT5fMkW1f2A%40mail.gmail.com.
