Fig 2.

Homogeneous surface-based freezing nucleation rates in supercooled water. Eq. 5 was used to convert the reported volume-based rates, shown in Fig. 1, into surface-based rates. Symbols and color charts are defined in Fig. 1. Note that the error bars on open circles are larger than those shown in Fig. 1 because no information is given in refs. 27 and 28 on the size of particles used for each individual experiment. Thus we have extended the length of the error bar to account for the effect of variation in the droplet size range on the rate of the surface nucleation process.