The author concludes in his bullet item list that solar geoengineering is less effective than assumed. Firstly, he should say "SAI" because MCB and surface reflection are in the solar geoengineering umbrella. And, the volcano was not SAI. SAI is STRATEGIC.
On Tuesday, February 20, 2024 at 7:42:32 AM UTC-5 Geoengineering News wrote: > *This item and others will be in the monthly “Solar Geoengineering Updates > Substack” newsletter:* https://solargeoengineeringupdates.substack.com/ > ----------------------------------------------------------------- > > https://www.sciencedirect.com/science/article/abs/pii/S1364682624000154 > > *Authors* > Alberto Boretti > > *15 February 2024* > > https://doi.org/10.1016/j.jastp.2024.106187 > > *Highlights* > •A novel approach is used, based on best fitting with a polynomial, > multiple sinusoids and a rectangular function of temperature time series. > > •The impact of the 1991 volcanic eruption of Mt. Pinatubo is assessed as a > departure from this trend. > > •The volcanic eruption had smaller effects than believed. > > •Global cooling was less than 0.5 °C lasting fewer than 18–36 months, > respectively 0.2 °C and 13 months. > > •Solar geoengineering is likely less effective than assumed, with more > side effects. > > *Abstract* > A cooling of up to 0.5 °C which lasted 18–36 months is attributed to the > 1991 Mt. Pinatubo eruption. A simple mathematical approach is here applied > to the 43-year-long satellite global temperature time series. This time > series is fitted with a parabolic function representing global warming, > multiple sinusoidal functions representing natural variability, and a > rectangular function representing the cooling of Mt. Pinatubo. The cooling > is estimated at up to 0.28 °C, 0.2 °C on average. Similarly shorter is the > duration of the cooling, about 13 months. *This result impacts the > risk-to-benefit ratio of SAI which may be worse than thought.* > > *Source: ScienceDirect* > -- 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/8492e51f-c1e7-47ec-bd09-1d99d82cc748n%40googlegroups.com.
