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Clouds

Clouds. Cloud Formation. Moist air rises Convectional lifting: warm air is less dense than cold air Orographic lifting: when wind encounters a mountain, the air must go up. . Cloud Formation. Air expands and cools Cooled water vapor condenses Cloud droplets form

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Clouds

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  1. Clouds

  2. Cloud Formation • Moist air rises • Convectional lifting: warm air is less dense than cold air • Orographic lifting: when wind encounters a mountain, the air must go up.

  3. Cloud Formation • Air expands and cools • Cooled water vapor condenses • Cloud droplets form • Requires condensation nuclei - small particles around which cloud droplets form

  4. Cloud Formation • Cloud forms • Density of droplets increases until visible.

  5. Types of Clouds Altitude Shape Wispy = cirrus Puffy = cumulus Sheets = stratus Gray, rain = nimbus • Low clouds = strato • Middle clouds = alto • High clouds = cirro

  6. Types of Clouds

  7. Precipitation • Coalescence: cloud droplets collide to form a larger droplet. • When the droplet becomes too heavy, gravity takes over. • Precipitation includes all forms of water that fall from clouds. • hydrometeors

  8. Types of Precipitation

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