Figure 6.

Monthly ensembles for the period 2011–2015 of the number concentration of particles with diameters larger than 50 nm (N₅₀ – in red) and 120 nm (N₁₂₀ – in green). The continuous lines correspond to the median of the models for each month; the shaded areas show the 25% and 75% quartiles and the dashed lines the minimum and maximum of all models for the N₅₀ (red area) and N₁₂₀ (green area). Observational data are available for all stations except Jungfraujoch and are shown with symbols of the corresponding color.