Class 4b: Precipitation. Clouds Collections of tiny drops or ice crystals Source of all precipitation.

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Presentation transcript:

Class 4b: Precipitation

Clouds Collections of tiny drops or ice crystals Source of all precipitation

Clouds Cirriform: thin and wispy (ice)

Clouds Stratiform: grey and low

Clouds Cumuliform: white, flat-bottomed, puffy

Fog A cloud on the ground

Fog

Precipation: rain Collision and coalescense in the tropics Ice crystals elsewhere

Precipation Rain: Snow: Sleet: Glaze or freezing rain:

Atmospheric lifting Four ways a parcel of air might rise Convective lifting

Atmospheric lifting Orographic lifting (mountains)

Atmospheric lifting Frontal lifting Convergent lifting

Global distribution of precipitation Nature of air masses How much uplifting

Global distribution of precipitation Tropics: generally very rainy

Global distribution of precipitation Subtropics: generally very dry

Global distribution of precipitation Midlatitudes: wide variation

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