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Atmospheric ice clouds
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Scientists bear witness to birth of an ice cloud

Scientists have witnessed the birth of atmospheric ice clouds, creating ice cloud crystals in the laboratory and then taking images of the process through a microscope, essentially documenting the very first steps of cloud formation.
The team witnessed a process known as ice nucleation in unprecedented detail, taking time-lapse movies of the first few seconds when a particle attracts water vapor, forming ice crystals that become the core of icy cirrus clouds - the high, wispy clouds that act much like a blanket for our planet.

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RE: Nacreous clouds
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Cloud 11.08.14: Quick snap of an iridescent cloud

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L

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Iridescent Clouds
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Remarkable rainbow cloud towers over Mount Everest

Hovering in the sky, this rainbow cloud over Mount Everest took an astonished astronomer by surprise.
Oleg Bartunov, 51, caught the spectacle on camera during a Himalayas expedition in Nepal.

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L

Posts: 129960
Date:
Nacreous clouds
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Some of the coldest temperatures on Earth brought a rare cloud formation to the skies over Antarctica, scientists said Tuesday. The so-called nacreous clouds were situated high in the stratosphere, requiring temperatures less than minus 176 degrees Fahrenheit. A weather balloon measured temperatures at minus 189 degrees Fahrenheit on the day pictured. A rare and spectacular cloud formation has been seen at the end of the polar night at Australia's Mawson station in Antarctica.  Photographs taken by Renae Baker, a meteorological officer with the Australian Bureau of Meteorology at Mawson, on July 25 show delicate colours produced when the fading light at sunset passed through tiny water-ice crystals blown along on a strong jet of stratospheric air.
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