edu.ucar.opensky::articles:22687 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T15:29:57.941426 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7z60s1v Seasonal injection strategies for stratospheric aerosol geoengineering 2019-07-16T00:00:00Z publication https://n2t.org/ark:/85065/d7z60s1v https://doi.org/10.1029/2019GL083680 Visioni, D. author MacMartin, D. G. author Kravitz, B. author Tilmes, Simone author Mills, Michael J. author Richter, Jadwiga H. author Boudreau, M. P. author UCAR/NCAR - Library publisher Simulations of stratospheric aerosol geoengineering have typically considered injections at aconstant rate over the entire year. However, the seasonal variability of both sunlight and the stratosphericcirculation suggests seasonally dependent injection strategies. We simulated single-point injections of thesame amount of SO2in each of the four seasons and atfive different latitudes (30°S, 15°S, equator, 15°N, and30°N), 5 km above the tropopause. Ourfindings suggest that injecting only during one season reduces theamount of SO2needed to achieve a certain aerosol optical depth, thus potentially reducing some of the sideeffects of geoengineering. Wefind, in particular, that injections at 15°N or 15°S in spring of thecorresponding hemisphere results in the largest reductions in incoming solar radiation. Compared to annualinjections, by injecting in the different seasons we identify additional distinct spatiotemporal aerosol opticaldepth patterns, thanks to seasonal differences in the stratospheric circulation. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2019 American Geophysical Union. None eng geoscientificInformation