Nacreous clouds

Clouds that have a vivid iridescent appearance. They are formed of small droplets which scatter light in such a way that creates the distinctive luminescent appearance. Nacreous clouds form below -78 °C temperatures at altitudes 68,500 - 100,000 ft above the Earth's surface (in the lower stratosphere) over polar regions.They are also known as Polar Stratospheric Clouds (PSC) or 'mother-of-pearl clouds'. 

Mother-of-Pearl clouds thought to have inspired Edvard Munch's 'The Scream'

Research published in the Royal Meteorological Society's Weather journal suggesting that mother-of-pearl clouds inspired Edvard Munch's 'The Scream' has gained lots of attention at #EGU17 conference in Vienna. It was even featured on BBC News >> 

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