Accessibility navigation

Asperitas – a newly identified cloud supplementary feature

Harrison, R. G. ORCID:, Pretor-Pinney, G., Marlton, G. J., Anderson, D. G., Kirshbaum, D. J. and Hogan, R. J. (2017) Asperitas – a newly identified cloud supplementary feature. Weather, 72 (5). pp. 132-141. ISSN 0043-1656

Text - Accepted Version
· Please see our End User Agreement before downloading.


It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

To link to this item DOI: 10.1002/wea.2996


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 consider adding ‘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.

Item Type:Article
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:69830
Publisher:Royal Meteorological Society


Downloads per month over past year

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation