Figure 5

Variability of D versus Pearson correlation coefficient r² obtained from the power-law fitting of cumulative number of particles all the TGSDs considered (Eq. 5, Table 1); (a) entire distribution; (b) particles coarser than fine ash (<0.64 mm); (c) lapilli (64–2 mm) to coarse ash (2–0.063 mm) particles. Variability of median particle diameter α versus: (d) D calculated over the entire distribution. (e) D calculated only for particles coarser than fine ash; and (f) lapilli to coarse ash. Symbols as in Fig. 2. Dashed lines are best fitting lines calculated for the empirical dataset not taking into account co-PDC distributions (red dots).