Frazil ice is a collection of loose, randomly oriented ice crystals a millimeter and sub-millimeter in size, with various shapes, e.g., elliptical disks, dendrites, needles and of an irregular nature. [1][2][3][4][5] Frazil ice forms during the winter in open-water reaches of rivers as well as in lakes and reservoirs, where and when the water ...

2023年12月23日 · Frazil ice is a cold-weather phenomenon. It takes an area of water, a clear and cold night and then some wind to create water turbulence. It can form in rivers, lakes, reservoirs and oceans.

2024年12月20日 · According to weather experts in Ontario, frazil ice is a kind of slush ice. It forms when cold air temperatures and wind chill combine to cause surface water temperature to be …

2022年3月10日 · At Yosemite National Park, located east of San Francisco, California, the unique phenomenon known as frazil ice proves itself just as perilous, though its unusual nature …

2018年1月25日 · During some mornings in Yosemite Valley, when streamflow is relatively high but temperatures are below freezing, some creeks may seem to be full of slush rather than full of water. This is frazil ice, which forms when mist (for example, from a waterfall) freezes, then floats down the creek.

2021年9月1日 · Frazil ice typically consists of individual sub-mm to mm-sized particles that may appear like a coarse slush as it is sieved out of the water (Fig. 1), or, under careful observation, most commmonly in the form of disks, but also as needles, hexagons and a …

2024年11月21日 · Frazil ice is a "slushy ice" that forms on lakes or slow-moving rivers. Many times, it looks like needles, roughly 3 millimeters in diameter floating on the surface. However last week, the...

2020年12月9日 · Discover Yosemite's Frazil Ice! Learn everything you need to know about this magical phenomenon, including where to see it and what causes it.

2014年12月15日 · First it forms. Then it multiplies. Then it attaches to underwater structures like water system intakes. It’s frazil ice, and it’s led to the frazzled nerves of managers of surface water systems, especially those along the Great Lakes. Municipalities such as Evanston, Ill.,...

Frazil is almost always the first ice formation in rivers. The particles are typically about 1 millimetre (0.04 inch) or smaller in size and usually in the shape of thin disks. Frazil appears in several types of initial ice formation: thin, sheetlike formations…