Lecture Lecture 12 Cloud by ewghwehws

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									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
   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”
         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)
Cirrus
Cirrostratus

 Halo
Cirrocumulus (“Mackerel Sky”)
Altostratus
Altocumulus
Stratus
Stratocumulus
Nimbostratus
Cumulus Humilis (“Fair-Weather Cumulus”)
Cumulus Congestus (“Towering Cumulus”)
Cumulonimbus (Thundercloud)
Anvil

								
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