Fig. 4: Ice nucleation observed in laboratory experiments.
From: A biogenic secondary organic aerosol source of cirrus ice nucleating particles

Fractional ice nucleation of particles generated from isoprene-derived components as a function of ice supersaturation in the deposition freezing mode (−46 °C). The data represent the average of four supersaturation scans. For clarity, homogeneous freezing onset above Sice = 1.4 is omitted75. The left most black datapoint indicates the average variability of fice at −46 °C and Sice = 1.3.