Extended Data Fig. 2: Observed and predicted aerosol index, cloud droplet number concentration and radiative forcing during 2000–2100 over North America and Europe.

a–f, Past and future mean regional changes in AI (a,d), Nd (b,e) and RFaci (c,f) over NA (top) and EU (bottom) diagnosed from past and future aerosol emissions. This figure is the same as Extended Data Fig. 1, but for NA and EU.