Cloud Formation
Clouds may then be further classified according to species and varieties terms.
Cloud Development
Cumulonimbus
Stratiform Clouds: Flat layered appearance.
Stratus
Stratocumulus: May be caused by either thermal updrafts or turbulent eddies or both.
Processes causing saturation
2. Adding moisture: Dew Point increases to Temperature.
3. Mixing of two unsaturated parcels.
Example problem, pg. 149
Clouds and upslope fog
Other Fogs
zi = thinkness of layer
Radiation Fog: Infrared radiation at night from the ground surface lowers the temperature of the ground and results in lowering of the air in contact with the ground. If the temperature drops to, or below, the dew point temperature, fog forms.
The time the radiation fog begins to form can be approximated by the empirical formula: (7.10) where,
Residual Layer
FA: Free atmosphere layer
Within Atmospheric Boundary Layer
At night: Turbulence in the EZ ceases, leaving a non-turbulent separation layer called the capping inversion (CI), which is strongly statically stable.
The depth of the radiation fog layer can be determined by: (7.11)
Problems
Email: alcorn@ariel.met.tamu.edu
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