Preparing for my recent lecture on clouds I came across this set of images on the BBC website [01 June 2009] along with a brief explanation of a campaign by the Cloud Appreciation Society (yes, I am a member) for a designation for a new type of cloud – “asperatus” (meaning “roughened up” or “agitated”). Click through the images in turn and read the captions to find out more (or just enjoy the REALLY awesome photos). There’s more on the campaign for asperatus clouds at the Cloud Appreciation Society website.