I don't think I'll be seeing these any time soon. They sound like an inspiration, though. Go to the link for a slideshow.
The clouds only occur at high polar latitudes in winter, requiring temperatures less than minus 176 degrees Fahrenheit. A weather balloon measured temperatures at minus 189 degrees Fahrenheit on the day the photos were taken.
Resembling airborne mother-of-pearl shells, the clouds are produced when fading light at sunset passes through water-ice crystals blown along a strong jet of stratospheric air more than six miles above the ground.
1 comment:
Cool.
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