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  1. 1. Clouds and Precipitation By: Alex Kryzan
  2. 2. Adiabatic Temperature Changes and Expansion and conceptsTemperature changes thathappen when heat isn’t addedor subtracted are calledadiabatic temperature changes.The rate of adiabatic cooling orheating in unsaturated air iscalled the dry adiabatic rate.Rate of adiabatic cooling withsaturated air is called wetadiabatic rate. http://www.kidsgeo.com/geography-for- kids/0070-adiabatic-temperature-changes.php
  3. 3. Orographic lifting The mountains or big land forms act as barriers to the air flow. Witch forces the air to ascend.http://www.sci.uidaho.edu/scripter/geog100/lect/05-atmos-water-wx/05-part-7-atmos-lifting-fronts/ch5-part-7a-atmos-liftin.htm
  4. 4. What is a front?Is the boundarybetween collidingmasses of warm andcold air.Frontal wedging is aprocess that occurs witha front.The cold air acts as abarrier for warm air. http://okfirst.mesonet.org/train/meteorology/ Fronts.html
  5. 5. Convergence• The lifting of air that results from air in the lower atmosphere flowing together. http://geology.com/nsta/convergent-plate- boundaries.shtml
  6. 6. Localized convection liftingThis occurs when earthheats a curtain spot onearth.It warms a pocket of airmore then thesurrounding air witchlowers the pocketsdensity. http://www.richhoffmanclass.com/chapter4.ht ml
  7. 7. Stability When air temperatures increase with height is called a temperature inversion.http://cliffmass.blogspot.com/2010/06/low-clouds-over-pacific.html
  8. 8. CondensationWhen condensationoccurs , tiny bits ofparticulate matter,called condensationnuclei, serve as surfacesfor water vapor. http://www.kidsgeo.com/geography-for- kids/0107-condensation.php
  9. 9. Types of cloudsCirrus – clouds are high,white, and thin. They Stratus – they look likeoccur as patches or as sheets or layers thatdelicate veil-like sheets cover most of the sky.or extended wispyfibers that often have afeathery appearance.Cumulus – cloudsconsist of roundedindividual cloud masses.They consist of a flatbase and look likedomes or towers. http://eo.ucar.edu/webweather/cloud3.html
  10. 10. High clouds• It is a group of clouds• In this group consists of cirrus, cirrostratus and cirrocumulus clouds.• High clouds are made of ice.• http://www.windows2u niverse.org/earth/Atmo sphere/clouds/high_clo ud.html
  11. 11. Middle clouds• This group consists of altostratus and altocumulus clouds.• These clouds are made of ice crystals and water droplets.• http://www.windows2u niverse.org/earth/Atmo sphere/clouds/high_clo ud.html
  12. 12. Low clouds• This group consists of stratus, stratocumulus, and nimbostratus clouds.• These clouds are made of water droplets.• http://www.windows2u niverse.org/earth/Atmo sphere/clouds/high_clo ud.html
  13. 13. Clouds of vertical development• These clouds include cumulus and cumulonimbus clouds• They do not spread across the sky• They develop by warm air rising from the surface.• http://www.windows2uni verse.org/earth/Atmosph ere/clouds/high_cloud.ht ml
  14. 14. Fog• A thick cloud of water droplets.• It is a collection of ice crystals or water droplets.• It is a type of stratus.• http://en.wikipedia.org/ wiki/Fog
  15. 15. Cold cloud precipitation• The Bergeron process is a theory that relates the formation of precipitation to super cooled clouds, freezing nuclei, and the different saturation levels of ice and liquid water.
  16. 16. Warm cloud precipitation• When the air is saturated.• When it is supersaturated with ice the collision coalescence process begins.• That is a theory of raindrop formation in warm clouds and they collide with large cloud droplets.
  17. 17. Rain and snow• Rain is water evaporation in the clouds.• Snow is when the temperatures drop and the evaporation turns to a solid.
  18. 18. Sleet, glaze, hail• Sleet is rain and snow mixed.• Glaze is a layer of ice formed by freezing rain.• Hail is frozen rain• http://en.wikipedia.org/ wiki/Hail