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Ice eggs, or ice balls, are a rare phenomenon caused by a process in which small pieces of sea ice in open water are rolled over by wind and currents in freezing conditions and grow into spheroid pieces of ice. They may collect into heaps of balls or 'eggs' on beaches where they pack together in striking patterns.[1][2][3]
The gentle churn of water, blown by a suitably stiff breeze makes concentric layers of ice form on a seed particle that then grows into the floating ball as it rolls through the freezing currents.[4]
Given enough time, the frozen balls can grow to become boulder size. In 2016, giant snowballs washed up on a beach in Siberia, some measuring a metre (about 3 feet) across.
An ice specialist from the Finnish Meteorological Institute has been quoted as saying ice balls are rare but not unprecedented, and occur about once a year on the Finnish coastline as conditions allow.[5]
They also appear on the American Great Lakes along with pancake ice, forming in the middle of the lake, where they are called Ice balls.[6]
- ^ "'Ice eggs' cover Finland beach in rare weather event". BBC News. 2019-11-07. Retrieved 2022-04-22.
- ^ McRae, Mike (14 November 2019). "Hundreds of Mysterious 'Ice Eggs' Have Washed Up on a Finland Beach". ScienceAlert. Retrieved 2022-04-23.
- ^ geographyrealm (2019-11-14). "How Ice Balls Form". Geography Realm. Retrieved 2022-04-23.
- ^ "Image of the Week – Goodness gracious, great balls of ice!". Cryospheric Sciences. Retrieved 2022-04-23.
- ^ DeGeorge, Krestia (2019-11-14). "Thousands of rare 'ice eggs' have appeared on a beach in northern Finland". ArcticToday. Retrieved 2022-04-23.
- ^ "Ice balls on Lake Michigan | Lake michigan, Michigan, Michigan beaches". Pinterest. Retrieved 2022-04-23.