Fig. 6: Predicted vs. measured CCN number concentrations (NCCN).

a–i represent different supersaturation (SS) conditions (0.07% to 0.7%). Predictions are based on the κ-Köhler model approach using two types of effective hygroscopicity parameters (κ): κ vs. particle diameter (D) relationship in Eq. 2 (blue points) and constant value of κ = 0.3 (red points).