Have you ever seen an ice spike and wondered what caused it? Now you know.
Wednesday, February 17, 2016
Last Saturday afternoon, I noticed there was an ice spike in the outdoor water dish. Ice spikes are interesting phenomena. They form when a water surface is freezing. If the surface in a dish, for example, freezes all the way to the edge except for a hole, the water underneath can expand as it freezes and be forced through the hole. As the water is forced through the hole, it freezes and forms a spike (or tower or vase shape) It is most likely to happen with pure water such as rainwater and at temperatures between 15 and 25 degrees. There was, in fact, rainwater in the water dish (although there is some debris in the bottom of the dish), and the temperature that night was in the 20's.