Niemeier, U.; Timmreck, C. (2015): What is the limit of climate engineering by stratospheric injection of SO2?
Niemeier, U.; Timmreck, C. (2015): What is the limit of climate engineering by stratospheric injection of SO2? In Atmos. Chem. Phys. 15 (16), pp. 9129–9141. DOI 10.5194/acp-15-9129-2015.
"We estimate the reliability of our results through consideration of various injection strategies and from comparison with results obtained from other models. Our calculations show that the efficiency of such a geoengineering method, expressed as the ratio between sulfate aerosol forcing and injection rate, decays exponentially. This result implies that the sulfate solar radiation management strategy required to keep temperatures constant at that anticipated for 2020, while maintaining business as usual conditions, would require atmospheric injections of approximately 45 Tg(S) yr−1 (±15 % or 7 Tg(S) yr−1) at a height corresponding to 60 hPa."