Clouds and precipitation

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Jake Howard

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Clouds and precipitation

  1. 1. Clouds and PrecipitationJake Howard
  2. 2. Adiabatic Temperature Changes andExpansion & Cooling When air is heated, it becomes less dense and rises above the cooler air, it continues to expand because of the lesser amounts of pressure as it goes higher into the atmosphere. The molecules need energy to spread out, which makes them vibrate slower. This causes the temperature of these air molecules to drop. This is adiabatic http://www.kidsgeo. com/geography-for- cooling. kids/0070- adiabatic- temperature- changes.php
  3. 3. Orogrpahic Lifting Orographic Lifting is when an air mass is forced from a low elevation to a higher elevation. As the air mass gains altitude it cools down which will http://www.wateren increase the relative humidity cyclopedia.com/Ce- Cr/Climate- to 100% and create clouds. Moderator-Water- as-a.html
  4. 4. Frontal Wedging Frontal wedging is when warm air and cool air collide, this produces a front. The cooler air acts as a barrier and the warmer air rises. The cooler air is denser and the warmer air is less dense. This process, like orographic lifting, also lifts air and is a weather producer. http://www.geo. hunter.cuny.edu /~tbw/wc.notes/ 4.moisture.atm. stability/frontal _wedging.htm
  5. 5. Convergence When air in the lower atmosphere flows together, lifting happens. When air flows from multiple directions if must go somewhere. http://www.jamstec.go.j The uplifting of these winds p/e/about/press_release/ coming from different 20080313/ directions ends up forming a clouds.
  6. 6. Localized Convective Lifting On hot days, usually in the summer, the earth’s surface is heated unequally. This could possibly cause pockets of air to me warmer than the surrounding air. The rising parcels of warmer air are thermals. When thermals rise about the level of condensation clouds will form. http://www.richhoffm anclass.com/chapter4. html
  7. 7. Stability Air stability is measured by the temperature of the atmosphere and different heights. Stable air will not rise by itself, but some processes will force this air above the surface of the Earth, which will then form clouds. These clouds are often huge and generate thunderstorms. http://ocw.usu.edu/Fore Warmer air is less dense. And example of st__Range__and_Wildlif e_Sciences/Wildland_Fir density difference in stability is a hot air e_Management_and_Pla balloon. A hot air balloon will continue to nning/Unit_7__Atmosph rise as long as the air inside it is warmer eric_Stability_and_Insta bility_1.html than the surrounding air, therefore less dense.
  8. 8. Condensation When something changes from a gas to a liquid. The opposite of vaporization. Happens when vapor is cooled or compressed to its highest possible saturation. For example it could form on the wing of an airplane that is traveling through a low pressure area.
  9. 9. Types of clouds There are 4 types of clouds, High, Low, Middle, and Vertical. There are different clouds which fall under these types.
  10. 10. High Clouds Thin clouds that are blown long ways by the wind. They move across the sky west to east. They are usually involved with good weather. They often cover the entire sky.
  11. 11. Middle Clouds Middle clouds are altostratus clouds. They are formed by water droplets and appear gray or blue and fluffy. Sometimes parallel waves across the sky. These clouds might appear on a warm summer morning, signaling that a thunderstorm may come later in the day. Often cover the entire sky.
  12. 12. Low Clouds Low clouds are stratus clouds. They are they gray clouds that cover the entire sky. Do not usually produce precipitation. When thick fog lifts it forms these clouds.
  13. 13. Clouds of Vertical development These are called cumulus clouds. Look like pieces of floating cotton. The base of these clouds is often flat. They are the large clouds, they can sometimes turn into storm clouds.
  14. 14. Fog A collection of water droplets in the air on or near the earths surface. It is a type of stratus cloud. The amount of fog depends on the place because the moisture that forms it is created locally.
  15. 15. Cold cloud Precipitation
  16. 16. Warm Cloud precipitation
  17. 17. Rain and Snow
  18. 18. Sleet, Glaze, and Hail

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