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Gravity Air resistance
Solute Effect Pure Water: High Vapor pressure Small rain drop Salty Water: Low Vapor pressure Large rain drop
Table 7-1, p. 166
Bergeron Process (ice-crystal process) Ice grows at the expense of water drops.
Accretion (riming) Ice collecting suppercooled water drops Results in icy snow pellets called graupel
Aggregation Ice collecting small ice particles to make a snow flake
Fall Streaks -- icy crystals or snow falling
Dendrite snow crystal
Fig. 7-11, p. 172
Fig. 7-12, p. 173
Rime: super cooled drop freezing on contact
Freezing Rain: rain freezes on contact.
Fig. 7-21, p. 180
Fig. 7-23, p. 182 Days with Freezing rain
Fig. 5, p. 183
Fig. 7-18, p. 179
Precipitation Chapter 7
Chapter 7 Precipitation. An ordinary cloud droplet is extremely small (~20 micrometers) 100 times smaller than an average raindrop if in equilibrium…
Chapter 7. Global Precipitation Climatology Project (GPCP) Most rain falls near the equator. Notice how dry it is on.
Chapter 7. Precipitation Processes Precipitation is any form of water that falls from a cloud and reaches the ground. How do cloud drops grow? When.
Most collide on forward edge Some collide on backside About a million average sized droplets would be required to produce a raindrop! Terminal velocity:
1. Clouds are made up of: A.Liquid water droplets B.Ice Crystals C.Water Vapor D.A combination of liquid water, ice, and water vapor.
Cold advection Radiational cooling of clouds Solar heating of Earth’s surface Warm air advection at surface Air moving over a warm surface.
AOSC 200 Lesson 8.
Precipitation I. RECAP Moisture in the air (different types of humidity). Condensation and evaporation in the air (dew point). Stability of the atmosphere:
Class #4: Stability, cloud development, and precipitation Chapters 6 and 7 1Class #4 Monday, July 12, 2010.
Lecture 13: Precipitation W & H: Sections 6.4 and 6.5.
Types of Precipitation
GEU 0047: Meteorology Lecture 7 Precipitation
Types of Precipitation Precipitation comes in two forms Precipitation comes in two forms Liquid – rain, drizzle Liquid – rain, drizzle Solid - freezing.
Chapter 7 – Precipitation Processes
Chapter 5: Cloud Development and Precipitation Atmospheric Stability Atmospheric Stability Determining stability Determining stability Cloud development.
Part 2. Water in the Atmosphere Chapter 7 Precipitation Processes.
18.3 Cloud types and Precipitation Clouds are classified on the basis of their form and height Clouds are classified on the basis of their form and height.
Q. Why are cloud droplets larger over the ocean?
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