Fortea Morgana :) PeteByrdie certificated Princess
- Jul 14, 2014
- An Eochair
Lovely and Impressive and CLEVER then
FULL STORY: https://www.smithsonianmag.com/trav...ice-circles-other-winter-phenomena-180973946/The Science Behind Snow Rollers, Ice Circles and Other Winter Phenomena ...
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 (With Photo): https://apnews.com/ec1296f0492c0488ae8b69907735be98Coming 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 Video & More Photos): https://winnipeg.ctvnews.ca/rounded...ormation-spotted-on-manitoba-waters-1.5680565'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. ...
Presumpscot River, Maine, USA. ~91m diameter. Typical Americans, have to supersize everything. ...
FULL STORY: https://apnews.com/article/oddities-environment-and-nature-maine-aa2de93b8645c7891748e64fc88957c2Back in shape: Maine’s famous spinning ice disk says hello
Maine’s famous rotating ice disk is back.
The disk has begun to form in the Presumpscot River, where it partially formed in 2020 but failed to draw a worldwide audience like in its first appearance in 2019.
Westbrook city officials shared photos of the formation Wednesday on Facebook, encouraging residents to share more images of the disk while it’s still around. ...
Three years ago, a 100-yard-wide (91 meters) ice formation appeared in the river for the first time and brought international attention to Westbrook before it dissipated with the advent of warmer weather.