Ice Circles

Frideswide

Fortea Morgana :) PeteByrdie certificated Princess
Joined
Jul 14, 2014
Messages
14,419
Reaction score
17,984
Points
289
Location
An Eochair
Lovely and Impressive and CLEVER then :)
 

EnolaGaia

I knew the job was dangerous when I took it ...
Staff member
Joined
Jul 19, 2004
Messages
25,301
Reaction score
38,937
Points
314
Location
Out of Bounds
Here's a recent summary of ice circles and how they form ...
The Science Behind Snow Rollers, Ice Circles and Other Winter Phenomena ...

Ice Circles


Often spotted on lakes, ponds, rivers and other slow-moving bodies of water, ice circles look like frost-coated lily pads floating on the water’s surface. In actuality, ice circles occur when moving water forces ice to slowly rotate. “What’s happening here is shear—when on one side of the ice you have water that’s moving faster than on the other side causing the ice to rotate,” Jackson says. “The result is an eddy current, like a whirlpool.” The meteorologist explains that there are two ways for ice circles to form. The first happens when there’s ice in a stationary area but a change in water speed due to a topographic force, such as a bend in a river, causes the ice to rotate until it forms the shape of a circle. The other instance occurs when a hunk of ice breaks off of an ice sheet that’s located in a rotation zone. “The water surrounding it will cause it to rotate, naturally forming into a circle as any pointy edges start to grind down as they brush against the surrounding ice,” he says.

Where to see ice circles: While the Westbrook circle stands out for its magnificence, most ice circles are only a fraction of its size and crop up on the surface of lakes, ponds and rivers in areas known for reaching frigid temperatures in the winter, such as Canada, the northern United States and Scandinavia.
FULL STORY: https://www.smithsonianmag.com/trav...ice-circles-other-winter-phenomena-180973946/
 

EnolaGaia

I knew the job was dangerous when I took it ...
Staff member
Joined
Jul 19, 2004
Messages
25,301
Reaction score
38,937
Points
314
Location
Out of Bounds
According to this short video, it's similar to car manufacturer AION's logo & is a publicity stunt.. ...

Yep ... It's clearly artificial and not an example of the natural phenomenon.
 

EnolaGaia

I knew the job was dangerous when I took it ...
Staff member
Joined
Jul 19, 2004
Messages
25,301
Reaction score
38,937
Points
314
Location
Out of Bounds
Last year's huge ice circle on the Presumpscot River (Maine) appears to be re-emerging this winter.
Coming around again: Famous ice disk seems to be re-forming

An ice disk appears to be forming in the same Maine river where an unusually large one formed last winter and quickly gained international fame.

The City of Westbrook tweeted an aerial view of the disk in the Presumpscot River with the message: “ICE BREAKING NEWS: Ice Disk 2020 is making a run for it...It’s not a perfect circle yet, but it is rotating counter-clockwise again & the seagulls are along for the ride.” ...

The ice formation comes just about a year after a disk measuring about 100 yards (91 meters) was spotted in the Presumpscot River. It eventually had a devoted webcam; social media users compared it to an alien spacecraft and the moon; and ducks used it as a raft.

A video of the disk shows a nascent ice blob that is thinner and less circular than the famous disk of 2019. ...
FULL STORY (With Photo): https://apnews.com/ec1296f0492c0488ae8b69907735be98
 

EnolaGaia

I knew the job was dangerous when I took it ...
Staff member
Joined
Jul 19, 2004
Messages
25,301
Reaction score
38,937
Points
314
Location
Out of Bounds
'Ice pancakes' and 'ice balls' are forming in Manitoba. This news article illustrates these latest examples and provides explanations for how they form.

ice-pancakes.jpg

'Rounded pancake shapes': Another unique ice formation spotted on Manitoba waters

From ice balls to now ice pancakes, water in Manitoba is showing the unique shapes it can make.
Ice pancakes have been spotted at Winnipeg Beach and at York Landing.

Greg McCullough, a geographer at the University of Manitoba, said the formations are created when ice crystals start gatherings in little groups on the water's surface in slightly wavy conditions.
"They'll tend to grow outwards in roughly a circle, and then gradually the ice will form up and these groups will be jostling around together. So they will rock around and they will knock any rough edges off and you end up with a whole lot of fairly rounded pancake shapes," said McCullough.

Ice balls have also been found in the province on Lake Manitoba. ...

Experts says snowflakes freezing on top of the water, mixed with waves or wind can cause everything to turn and create snowball shapes. ...
FULL STORY (With Video & More Photos): https://winnipeg.ctvnews.ca/rounded...ormation-spotted-on-manitoba-waters-1.5680565
 
Top