Fig. 13.

PSDs measured by ViewSizer 3000 after applying the volume correction and by the Coulter Counter during the EXPORTS‐2018 cruise (gray curves). The darker gray curves represent the PSDs measured by ViewSizer 3000 after applying both the volume correction and discarding data at sizes < 250 nm. Blue and red curves represent one example of the PSDs of the same water sample measured by the two instruments. The dotted black line represents the extrapolation of the Coulter Counter data (red curve) from 2 to 20 μm fitted to a power‐law distribution. The dotted blue curve represents the PSD corresponding to the blue curve but before applying the volume correction.