In Figure , we have plotted the cluster formation potential of the three nucleation pathways defined in the computational details. The shaded areas in the figures corresponds to the difference between running the simulation at 34% and 73% relative humidity. It can be seen that the cluster formation potential of the pure oxyacids is low at this level of theory, starting at 10 -8 cm -3 s -1 for IA concentrations of 10 6 cm -3 , only rising above 1 cm -3 s -1 around 6 × 10 7 cm -3 . This is at the upper limit of measured IA concentrations during aerosol bursts. On the other hand, the "oxyacid + mixed acids" nucleation pathway, starts around 10 -1 cm -3 s -1 at low amine concentrations and starts closer to 10 2 cm -3 s -1 at high amine concentrations. However, it exhibits a shallower slope with higher IA concentrations, but in both cases, we see significant nucleation at more common IA concentrations for the "oxyacid + mixed acids" system compared with the "pure oxyacid" nucleation. Finally, we see that the "oxyacid-assisted oxide" nucleation starts at 10 -1 cm -3 s -1 , but rises more steeply than the "mixed acid" pathway. Even at low iodine concentrations, it is competitive against the "mixed acid" pathway at low amine concentrations, and it can compete with the "mixed acid" pathway at high amine concentrations given high enough iodine concentrations.