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Regelation is the phenomenon of ice melting under pressure and refreezing when the pressure is reduced. This can be demonstrated by looping a fine wire around a block of ice, with a heavy weight attached to it. The pressure exerted on the ice slowly melts it locally, permitting the wire to pass through the entire block.
Black (or clear) ice is generally more solid and stable, while white ice is formed by irregular melting and refreezing and can be more precarious and unpredictable.
The cycle of ice melting and refreezing along a river's bank can create beautiful natural sculptures. Art in nature: Late-winter melting, refreezing cooks up ice pancakes, marbles and more Skip to ...
New satellite images show the extreme melting that has taken place on the critical Greenland ice sheet, according to researchers.. The sheet is a mass of glacial land ice and is an integral part ...
Ice dams on roofs form when accumulated snow on a sloping roof melts and flows down the roof, under the insulating blanket of snow, until it reaches below freezing temperature air, typically at the eaves. When the meltwater reaches the freezing air, ice accumulates, forming a dam, and snow that melts later cannot drain properly through the dam ...
As a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock. The freezing and thawing action of the ice enlarges, widens, or causes further cracks in the bedrock as it changes volume across the ice/water phase transition (a form of hydraulic wedging), gradually loosening ...
A mesmerizing video of ice shattering on frozen Lake Superior in Minnesota is making the rounds on social media -- and it isn't exactly hard to see why. According to National Geographic, this ...
Chasing Ice is a 2012 documentary film about the efforts of nature photographer James Balog and his Extreme Ice Survey (EIS) to publicize the effects of climate change. The film was directed by Jeff Orlowski. [1] It was released in the United States on November 16, 2012.