Line Plot from Scientific Research

Timing of major volcanic eruptions denoted by grey arrows with negative radiative forcing (W m -2 ) (ref. 16 ). Onset of industrial warming in mid-1860s (light blue arrow) followed by emergence in early 1870 (blue arrow). Error bars are 2 s.e.m. (Supplementary Fig. 1 ) with light blue line showing 5-year moving average.

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