Overview of the ice crystal axial dimensions measured during the seeding missions S5-6.6 () and S5-9.3 (). a) 2D histogram of the major and minor axis length of the detected ice crystals. The number of ice crystals observed with a given major and minor axis length during S5-9.3 are shown with the green colormap, while S5-6.6 is shown by the purple contour lines. The dots represent the corresponding median axial dimensions (including all observed ice crystals) and the black lines show contour lines of aspect ratio (defined by major axis length divided by minor axis length). b, c) Normalized probability density function (PDF) of the major and minor axis length. The triangles represent the corresponding time-weighted medians, whereas the numbers indicate the mean values and standard deviations of the PDFs. In the upper-right corner, a schematic of a column’s major and minor axes is displayed, corresponding to growth along the basal and prism faces.
