Ice Rings on Lake Ontario

March 13, 2019

Ice rings in Lake Ontario (1)

Photographer: Peter Oldfield 
Summary Authors: Peter Oldfield; Jim Foster

This photo above showing ice rings forming on Lake Ontario was taken from Whitby Harbour on February 3, 2019. At the time the picture was snapped the air temperature was approximately 18 F (-8 C), but the previous week temperatures dropped to about -10 F (-23 C) on several consecutive mornings. Often observed near breakwater or an obstruction where ice readily piles up, these frozen ring formations are a type of ice called pancake ice. As pieces of lake ice (in this case) rub and bump against each other due to wave action the fragile ice edges are pushed upward and become rounded rather quickly. The most conspicuous ring here is perhaps 3 ft (0.9 m) in diameter. Note that the lake water in the background is largely ice-free.

Photo Details: Camera: BlackBerry BBB100-1; ISO equivalent: 100; Aperture: ƒ/2.0; Exposure Time: 0.0029s (1/340).