On 23rd March 2017 - World Meteorological Day - the World Meteorological Organization (WMO) released its new, online, digitised International Cloud Atlas, which is the global reference for observing and identifying clouds. It contains a number of new cloud classifications, including the eagerly-awaited asperitas, a dramatic undulated cloud which has captured public imagination.
WMO Secretary-General Petteri Taalas said “The International Cloud Atlas is the single most authoritative and comprehensive reference for identifying clouds. Its reputation is legendary among cloud enthusiasts and it serves as an essential training tool for professionals working in meteorological services, and in sectors such as aviation and shipping,”
The Royal Meteorological Society was involved in a numerous aspects of the new Cloud Atlas - a summary of the timeline can be found here >>
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