https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019GL083680
Seasonal Injection Strategies for Stratospheric Aerosol Geoengineering Daniele Visioni Douglas G. MacMartin Ben Kravitz Simone Tilmes Michael J. Mills … See all authors First published: 01 July 2019 https://doi.org/10.1029/2019GL083680 Read the full text About Share on Abstract Simulations of stratospheric aerosol geoengineering have typically considered injections at a constant rate over the entire year. However, the seasonal variability of both sunlight and the stratospheric circulation suggests seasonally dependent injection strategies. We simulated single‐point injections of the same amount of SO2 in each of the four seasons and at five different latitudes (30°S, 15°S, equator, 15°N, and 30°N), 5 km above the tropopause. Our findings suggest that injecting only during one season reduces the amount of SO2 needed to achieve a certain aerosol optical depth, thus potentially reducing some of the side effects of geoengineering. We find, in particular, that injections at 15°N or 15°S in spring of the corresponding hemisphere results in the largest reductions in incoming solar radiation. Compared to annual injections, by injecting in the different seasons we identify additional distinct spatiotemporal aerosol optical depth patterns, thanks to seasonal differences in the stratospheric circulation. -- 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-07sKNA6ufK_EhoFrBwaWnSS_LD336eneE60r44K7PJ6ZQ%40mail.gmail.com.
