Figure 2
From: Detecting sulphate aerosol geoengineering with different methods

Distributions of the estimated time horizon over which the SAI influence would become detectable in the temporal pattern of global-mean SATs after 2020 by using the (a) TfC0, (b) TfC1, (c) BgC0 and (d) BgC1, respectively, at the 10% level.
The results are more sensitive to the choice of filter than to the detection methods alone.