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Conditions for Cloud Formation

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Presentation on theme: "Conditions for Cloud Formation"— Presentation transcript:

1 Conditions for Cloud Formation
Clouds are made of which 2 states of Matter? Liquid Ice CONDENSATION NUCLEI: Surface for water vapor to condense on (dust, smoke, salt) -How does this help the formation of clouds?

2 Other ingredients for Cloud Formation
Air must be saturated Cooling leads to condensation 3. LOW PRESSURE Causes air to e x p a n d…cooling air to its dewpoint Cloud Video

3 Convective Cooling The lowering of the temperature of a mass of air due to its rising and expanding.

4 FORCEFUL LIFTING

5 FORCEFUL LIFTING 1. Frontal Wedging
- a moving mass of warm air encounters a mass of cold air in its path and rises up over it 2. Orographic Lifting - An air mass is force from a low elevation to a higher elevation as it moves over rising terrain.

6 Forceful Lifting: Frontal Wedging

7 Forceful Lifting: Frontal Wedging

8 Forceful Lifting: Frontal Wedging

9 Forceful Lifting: Frontal Wedging

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11 Orographic Lifting RAINSHADOW Effect

12 Forceful Lifting

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17 FOG The result of condensation of water vapor in the air. Formed near the surface of the earth. Like a cloud, only lower.

18 FOG Radiation fog At night, layer of air above ground is cooled to it’s dew point Advection fog Warm moist air moves over a cold surface (mostly coastal)

19 Precipitation Work on 5.04 table Use pg Due Monday!

20 CLOUD CLASSIFICATION

21 CLOUD TYPES There are three major cloud types:
Stratus- low layers of clouds. These clouds can bring light rain. Fog is usually a layer of stratus clouds touching the ground.

22 CLOUD TYPES Cumulus- mid-level clouds that are fluffy and have flat bases. Large cumulus clouds can produce thunderstorms. Cirrus- high-level clouds that are wispy. No precipitation is associated with these clouds.

23 CLOUD TYPES Cloud prefixes & suffixes:
Cirro- high level clouds Alto- mid-level clouds Strato- low-level clouds Nimbo/nimbus- rain clouds Cumulo- towering clouds These terms can be combined to form several cloud names.

24 CLOUD TYPES Cumulonimbus- towering cumulus cloud capable of thunderstorms. Stratocumulus- low-level, layered and puffy clouds. Nimbostratus- low layers of clouds that are capable of bringing long, steady rain.

25 CLOUD TYPES Cirrostratus- high, thin layered clouds. These can form halos around the moon or sun. Altostratus- mid-level, layered clouds. These look gray/blue. The sun is visible through them. Altocumulus- mid-level clouds that are puffy. Cirrocumulus- high-level clouds that are puffy.


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