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Author Topic: Arctic Image of the Day  (Read 572499 times)

uniquorn

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Re: Arctic Image of the Day
« Reply #1650 on: November 07, 2019, 11:30:29 PM »
Risto Matilla, an amateur photographer, took this picture of the eggs, the largest of which was the size of a football. Photograph: Risto Mattila
https://www.theguardian.com/world/2019/nov/07/couple-rare-ice-eggs-finnish-beach
Quote
Jouni Vainio, an ice specialist at the Finnish Meteorological Institute, said the occurrence was not common, but could happen about once a year in the right weather conditions.

“You need the right air temperature (below zero, but only a bit), the right water temperature (near freezing point), a shallow and gently sloping sandy beach and calm waves, maybe a light swell,” he said.

“You also need something that acts as the core. The core begins to collect ice around it and the swell moves it along the beach, forward and back. A small ball surface gets wet, freezes and becomes bigger and bigger.”