Fig 2. Values of n_s in units of cm^-2 as a function of temperature, at concentrations of 0.01-0.1 wt%, for droplets of nanolitre and microlitre volume containing Soufriere Hills volcanic ash.

Parameterisations of K-feldspar taken from Atkinson et al. [31] and desert dusts taken from Niemand et al. [36] are included for comparison.