The increased use of technology capable of photographing and sharing images has prompted the World Meteorological Organization to add 11 new cloud classifications to their International Cloud Atlas. “A far cry from simple white puffs, these 11 new cloud types roll, dip, and menace their way across the skies,” reports National Geographic. From the report: These 11 additions are the first updates that the atlas has received in 30 years, and much of the change can be attributed to citizen scientists who can share and discuss clouds by uploading photos to the Atlas’s site. 2017 is the first year that the renowned atlas will be published entirely online, but a hardbound version will follow later this year. Asperitas, Latin for roughness, is the cloud type that has citizen scientists most excited and has been a special victory for the UK-based Cloud Appreciation Society. This photo, first spotted in 2006, captured their attention for its inability to be described by existing cloud types. Marked by small divot-like features that create chaotic ripples across the sky, asperitas were championed by enthusiasts who noticed they did not accurately fall under existing categories. Other clouds that formerly went by more colloquial names, such as the wave-like Kelvin-Helmoltz cloud, and fallstreak holes, will now be recognized with the Latin names fluctus and cavum, respectively. You can watch a time-lapse of the newly classified asperitas here.
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