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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
THE WATER CYCLE The water cycle — the continuous exchange of water between Earth's surface and atmosphere — is Earth's natural mechanism for recycling.
Chapter 7. Global Precipitation Climatology Project (GPCP) Most rain falls near the equator. Notice how dry it is on.
Cloud Development and Precipitation
Chapter 7 Precipitation Processes Chapter 7 Precipitation Processes.
Precipitation Cloud particles are so small that they are easily kept afloat by even the weakest updrafts. This is why most clouds do not produce rain.
Precipitation I. RECAP Moisture in the air (different types of humidity). Condensation and evaporation in the air (dew point). Stability of the atmosphere:
Precipitation Chapter 7
AOSC 200 Lesson 8.
Precipitation Types Global and Regional Mean Precipitation 1. Types of Precipitation: 2. Measurement: FIT, Feb 15,
Precipitation Formation How can precipitation form from tiny cloud drops? 1.Warm rain process 2.The Bergeron (ice crystal) process 3.Ice multiplication.
ATS 351 Lab 7 Precipitation March 7, Droplet Growth by Collision and Coalescence Growth by condensation alone takes too long Occurs in clouds with.
Part 2. Water in the Atmosphere Chapter 7 Precipitation Processes.
Class #4: Stability, cloud development, and precipitation Chapters 6 and 7 1Class #4 Monday, July 12, 2010.
1 Lesson 01: Water and Weather P Water Cycle The movement of water from the land to the rivers and oceans, to the atmosphere, and back to.
Lecture 13: Precipitation W & H: Sections 6.4 and 6.5.
Q. Why are cloud droplets larger over the ocean?
Cold advection Radiational cooling of clouds Solar heating of Earth’s surface Warm air advection at surface Air moving over a warm surface.
Moisture in the Air.
Most collide on forward edge Some collide on backside About a million average sized droplets would be required to produce a raindrop! Terminal velocity:
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