Sunday, January 12, 2014

Ice Balls!

Ice balls, or ice boulders, a fascinating natural phenom recorded during the US Polar Vortex last week:

The incredible basketball sized - and bigger - 'ice balls' have been captured on film at Glen Arbor Township, Michigan, were they  cover the entire shoreline.

Despite appearing as unnatural creations, the boulders are a regular feature of Lake Michigan when temperatures drop below freezing, and are formed by ice clumping together in a similar way to snowballs.

Meteorologist Joe Charlevoix explains: "[When] the water temperature on the Lake Michigan is just a little bit below freezing, so you get a small piece of ice that forms in the water and as waves move back and forth it adds additional water and freezes in layers.

"It gets bigger and bigger, and eventually you get big balls of ice, that are pushed to the shore by the wind."

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