Extended Data Table 3 Effect of SSAs on atmospheric forward scattering

From: Estimating global agricultural effects of geoengineering using volcanic eruptions

  1. The dependent variable is the probability that a photon of light makes it to the surface, conditional on hitting a particle (w in equation (3) in Supplementary Information). Coefficients on SAOD represent the effect of increasing SAOD by 1 unit on w for the entire atmospheric column. Column 1 is our preferred specification (equation (5) in Supplementary Information). Column 2 drops cloud controls and includes both the Pinatubo and El Chichón eruptions. Column 3 estimates the effects for El Chichón and Pinatubo separately. All models account for station-by-day-of-year fixed effects. Standard errors of the mean, shown in parentheses, are clustered by country and by year to account for serial correlation over time within a country and for autocorrelation across space within a year. We calculate P values using a two-sided t-test. ***P < 0.01.
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