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Clouds

Clouds. C. What are clouds made of?. - Water v apor condensed to liquid or ice. - Air that has reached dew p oint - Condensation nuclei (dust, salt, smoke, pollutants). Environmental Lapse Rate. - Temperature drops 5 C every 1000 meters due to the expansion of air.

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Clouds

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  1. Clouds C

  2. What are clouds made of? - Water vapor condensed to liquid or ice. - Air that has reached dew point - Condensation nuclei (dust, salt, smoke, pollutants)

  3. Environmental Lapse Rate - Temperature drops 5 C every 1000 meters due to the expansion of air. • McDonald Pass is 1924 meters, Helena elevation is 1324 meters. •What is the temperature difference?

  4. Expansion Compression

  5. Three ways air is lifted. • Orographic lifting – mountain lifting. 2. Frontal Wedging – when air masses meet. 3. Convective lifting– heated area’s air rises.

  6. - Orographic lifting “RainShadow Effect” Effect”

  7. Oregon Rain shadow Effect. - Mt. Hood is the snowcapped Peak.

  8. - Frontal Wedging

  9. - Convective Lifting

  10. Different types of clouds indicate different types of weather. - Cirrus: High feathery clouds—usually clear skies - Stratus: Layered clouds from wind blowing horizontally—usually associated with fronts of moisture with stable air.’ - Cumulus: Puffy clouds from convection moving clouds vertically - Cumulonimbus: Large and tall clouds which produce heavy precipitation.

  11. Cirrus

  12. Cumulus

  13. Cumulonimbus

  14. Stratus

  15. Why don’t all clouds produce precipitation? • For precipitation to occur on earth, water droplets must grow by 1,000,000 times.

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