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Clouds and Fog Section 24.2.

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Presentation on theme: "Clouds and Fog Section 24.2."— Presentation transcript:

1 Clouds and Fog Section 24.2

2 Cloud Formation Clouds result from the condensation of water vapor in the atmosphere Suspended particles of ice, slat, dust, etc, provide the surfaces necessary for the cloud-forming condensation. These particles are called condensation nuclei.

3 Adiabatic Temperature Changes
Are changes in temperature that result from the expansion or compression of air For dry air, temperature of dry air decreases about 1°C for every 100 m For moist air it varies from 0.5°C to 0.7°C per 100m

4 Condensation Level When the air reaches a level where its temperature is lower than its dew point, the moisture in the air condenses to form a cloud

5 Forceful Lifting Air can be forced up quickly when it encounters a mountain range During storms, warm air is pushed above denser cooler air

6 Classification of Clouds
Clouds are classified by their form and altitude Low clouds – up to 2000 m middle clouds m high clouds – above 6000 m

7 Stratus clouds Sheetlike, layered clouds. These are the most extensive clouds in the sky. Little rain usually falls from these kinds of clouds Varieties: nimbostratus, altostruatus

8 Cumulus

9 Cumulus CLouds

10 Cirrus Clouds

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