Extended Data Fig. 1: Failed scenario 1, a modelled increase in CO₂ directly to the atmosphere.

Panels a–g are parameter changes and panels h–p are key model results as detailed for Main Fig. 3. In all panels (apart from e, j and m) the black line is the model average and the grey band is the ±1σ. In panels m and p the blue line and band are from Main Fig. 2.