Asperitas - a newly identified cloud supplementary feature

Giles Harrison, R. ; Pretor-Pinney, Gavin ; Marlton, Graeme J. ; Anderson, Graeme D. ; Kirshbaum, Daniel J. ; Hogan, Robin J.

Année de publication
Cloud images obtained through a crowd-sourced international observing network suggest a cloud variety that has hitherto not been explicitly classified. This cloud feature shows a roughened base, which, under some solar illumination conditions, provides a particularly dramatic appearance. The growing body of photographic observations have led the World Meteorological Organisation to add asperitas to the 2017 edition of the International Cloud Atlas as a new form of supplementary cloud feature. We compare reported sightings with available meteorological data to investigate the conditions that give rise to this newly recognised cloud description.

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