Figure from Describing the composition of sea-ice cores and the development of the antarctic sea-ice cover

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Proportional representation of the amounts of snow ice, frazil ice, and congelation ice observed in four cores obtained from the same ice floe. Each column represents the total length of ice core examined normalized to 1 or 100 percent. The total amount of each ice type observed in each core is represented by the length of the space it occupies within the column. For example, a total of 0.18 m of snow ice was observed in core 247-3, representing 27.2 percent of the total core length of 0.66 m. The contribution of a particular ice type to the development of the floe is calculated by the average or absolute method, as illustrated to the right of the core diagrams.