Ice Column on the Frozen Surface of Water Observed at Utsunomiya

[摘要] The author succeeded to make an ice column on the frozen surface of water in the evaporimeter of 20cm, in diameter. He gave a shock to the frozen surface of water in the evaporimeter by tilting it at 10h pm. when the surface of water was covered by thin ice and found ice columns on the frozen surface at 2 o'clock on the next morning, Another ice column were found in a water reservoir of wet bulb thermometer. It was a square column. Its height was 2 bu at 2h am, and 5 bu at 6h am. It grew up 0.7 bu per hour (3.3bu=1cm)

[学科分类] 大气科学