1. Lecture 23
Buoyancy, Stability, Clouds and Fog

2.  A visible collection of microscopic liquid
water droplets and/or ice crystals

3.  Adiabatic Cooling of Rising Air
 Condensation and/or Deposition
 Need something to condense or deposit
upon:
◦ Condensation Nuclei
◦ Freezing Nuclei

4. ◦ Stratus clouds
◦ Cumulus clouds
4
Figure 6-15b
Figure 6-15c

6. ◦ High clouds (> 6 km)
◦ Middle clouds (2 - 6
km)
◦ Low clouds (<2 km)
◦ Clouds of vertical
development
 Can grow up from low
bases to>15 km
6
Figure 6-16

23. 23