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Understanding Cloud Types: Classification, Forms, and Characteristics

This lecture explores the classification and types of clouds, focusing on their forms: stratiform, cumuliform, and cirriform. It delves into the characteristics of various cloud genera, including high clouds like cirrus and cirrostratus, middle-level clouds such as altostratus and altocumulus, and low clouds including stratus and nimbostratus. Additional emphasis is placed on clouds exhibiting vertical development, like cumulus and cumulonimbus. This comprehensive overview highlights the similarities in cloud classification to biological genera and species.

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Understanding Cloud Types: Classification, Forms, and Characteristics

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Presentation Transcript

  1. Lecture 12 Cloud Types See Ahrens, Ch. 4

  2. Classification • Forms • Stratiform • Cumuliform • Cirriform • Height • Genera, species, varieties (as in biology) • (Genera also called cloud “types”)

  3. Forms • Stratiform (like stratus) • Arranged in horizontal sheets • Comes from Latin verb meaning “to spread out” • Cumuliform (like cumulus) • “Rounded masses” • Comes from Latin verb meaning “to swell” • Cirriform (like cirrus) • Fibrous; made of ice crystals • From Latin: “lock of hair”

  4. Cloud Genera (Types) • High Clouds • Cirrus (Ci), cirrostratus (Ci), cirrocumulus(Cc) • Middle-level Clouds • Altostratus (As), altocumulus (Ac) • Low Clouds • Stratus (St), nimbostratus (Ns), stratocumulus (Sc) • Clouds exhibiting extensive vertical development • Cumulus(Cu), cumulonimbus (Cb)

  5. Cirrus

  6. Cirrostratus Halo

  7. Cirrocumulus (“Mackerel Sky”)

  8. Altostratus

  9. Altocumulus

  10. Stratus

  11. Stratocumulus

  12. Nimbostratus

  13. Cumulus Humilis (“Fair-Weather Cumulus”)

  14. Cumulus Congestus (“Towering Cumulus”)

  15. Cumulonimbus (Thundercloud) Anvil

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