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Physical GeographyLecture 23
Buoyancy, Stability, Clouds and Fog
A visible collection of microscopic liquid water droplets and/or ice crystals
Clouds
Adiabatic Cooling of Rising Air Condensation and/or Deposition Need something to condense or deposit
upon: ◦ Condensation Nuclei◦ Freezing Nuclei
Formation of Clouds
Cloud Forms
◦ Stratus clouds
◦ Cumulus clouds
4
Figure 6-15b
Figure 6-15c
Cirrus
Cloud Heights
◦ High clouds (> 6 km)
◦ Middle clouds (2 - 6 km)
◦ Low clouds (<2 km)
◦ Clouds of vertical development Can grow up from low