Extended Data Figure 2. Theoretical dependence of amine ternary nucleation rates on RH.

Modelled neutral nucleation rates as a function of RH (left-hand scale) at 2.0 × 10⁶ cm⁻³ [H₂SO₄] and 278 K, and either 0.1 p.p.t.v. DMA (purple curve) or 10 p.p.t.v. DMA (red curve). The nucleation rates relative to their value at 38% RH are shown on the right-hand scale (dashed purple and red curves).