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Lecture 12

Lecture 12. Cloud Types See Ahrens, Ch. 4. Classification. Forms Stratiform Cumuliform Cirriform Height Genera, species, varieties (as in biology) (Genera also called cloud “types”). Forms. Stratiform (like stratus) Arranged in horizontal sheets

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Lecture 12

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  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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