Cloud classification

Cloud classification is a system for naming clouds by their form, altitude, and development. The international system groups them into genera, species, and varieties.

Cloud genus: A primary cloud category defined by characteristic form and structure in the international classification. The ten genera form the system’s main categories.
Cloud formation: The process by which water vapor condenses or freezes into visible cloud particles. The processes that create clouds produce the structures the classification names.
Cirrus: A high cloud genus composed of ice crystals, typically appearing as thin filaments or wisps. Its wispy form is a defining example of a high-level genus.
Luke Howard: An English pharmacist and amateur meteorologist who proposed a systematic cloud-naming scheme in 1803. His Latin-based genera helped establish the vocabulary behind modern classification.
Cloud taxonomy: The hierarchical organization of clouds into genera and finer subdivisions such as species and varieties. Taxonomy describes the hierarchy within the naming system rather than its full observational practice.
Cloud species: A subdivision of a cloud genus describing structural details or how the cloud develops. Species refine a genus when its structure has a distinctive pattern.
Convection: The transfer of heat through the movement of fluid, including rising warm air in the atmosphere. Strong convection produces vertically developed clouds such as cumulonimbus.
Cumulus: A cloud genus with detached, usually dense clouds and distinct outlines, often showing vertical growth. Its heaps and domes exemplify the classification’s shape-based names.
Essay on the Modification of Clouds: Luke Howard’s 1803 work presenting a system for naming and describing cloud forms. This publication introduced the foundational naming scheme later expanded internationally.
Cloud climatology: The study of cloud distributions, properties, and changes across regions and time. Climatology analyzes cloud populations, while classification assigns names to individual forms.

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