Structure of the ice pillar in the cold room

Ice pillar, which means ice stalagmite linked to icicle in this paper, was formed in the cold room and the height of it was 185 cm. The growth processes of the ice pillar were estimated from the ice structures in the horizontal and vertical cross sections. The whole ice pillar consists of many ice crystals. Judging from the discontinuity of the ice structure, it can be presumed that the lower part of the ice pillar which had grown upward were linked to the upper part which had grown downward at around 170cm high. Either parts has different ice structure from the natural ice stalagmite or icicle, because too much water dropped intermittently and the air temperature in the cold room was too low during the ice pillar grew