Chapter 7 - Precipitation

Index of Lecture Notes

• introduction to precipitation
• relative sizes of CCN, droplets, and precip particles
• cloud droplet growth in warm clouds:
  • spontaneous nucleation:
    • unsaturated air above a flat water surface
    • saturated air above a flat water surface
    • saturated air over flat versus curved water surfaces
    • the curvature effect
    • examples with the curvature effect
  • solution drops
  • collision/coalescence
  • terminal fall speed of drops
  • life cycle of a droplet
  • factors promoting collisions
  • life cycle of a droplet in a shallow cloud
• warm clouds versus cold clouds - introduction
• cold clouds defined
• growth processes in cold clouds:
  • homogeneous freezing
  • deposition
  • contact freezing
  • accretion
  • aggregation
• growth of ice versus water particles
• growth of ice versus water particles - example
• cloud seeding
• cloud seeding - adding silver iodide or dry ice
• liquid precip types
• snow
• low level temperature distribution for snow
• low level temperature distribution for rain
• low level temperature distribution for sleet
• low level temperature distribution for freezing rain
• rime
• hail
• measuring precipitation
• Review Questions
• SAMPLE TEST QUESTIONS FOR CH 7
• CH 8 HOMEWORK:  NOTES | PROBLEMS