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Clouds and precipitation

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  • 1. Lauren Dreghorn-carver Meteorology Mrs.Joseph/mrs.Neisen
  • 2. Adiabatic temperature changes and expansion and cooling  Air expand-it cools and air compressed-it warms.  Rate of adiabatic cooling or heating in unsaturated air is the dry adiabatic rate.  When it is saturated air its called wet adiabatic rate and that dry's slower then the dry adiabatic. link: http://apollo.lsc.vsc.edu/~wintelsw/MET1010LOL/chapter 06/
  • 3. Orographic lifting facts http://www.crh.noaa.gov/unr /?n=weather  It occurs when elevated terrains  Mountains act as a barriers air flow that is forcing air to ascend
  • 4. Frontal wedging facts http://www.geo.hunter.cuny.edu/~tbw /wc.notes/4.moisture.atm.stability/fro ntal_wedging.htm  It’s a boundary between colliding masses of warm and cold air  It occurs at a front in which cold dense air acts as a barrier
  • 5. convergence facts http://ww2010.atmos.uiuc.edu/(Gh)/g uides/mtr/cld/dvlp/cnvrg.rxml  Its lifting of air  Results from air in the lower atmosphere  That makes it flow together
  • 6. Localized convection lifting •Lifting occurs when unequal heating of earths surface •It warms a pocket or air more then the surrounding air •Lowering the pocket of air density  Link http://www.richhoffmanclass.com/chapter4 .html
  • 7. Stability (density differences and stability and daily weather facts http://www.vietnamonline.com/destin ation/hanoi/weather-by- month/hanoi-weather-in-august.html  Tend to remain the original position when unstable air rises  Its most stable condition Is when air temp. increase  When that happens it is called temperature inversion
  • 8. Condensation facts http://keep3.sjfc.edu/students/kes00898/e- port/condensation%20page%20for%20unit. html  For it to form it needs to have dew,fog,or clouds and the air must be saturated  Air above ground turn into tiny particulars matter that is called condensation nuclei  It serves as a surface for a water vapor
  • 9. Types of clouds facts http://eo.ucar.edu/webweath er/cloud3.html  They are classified how they are classified is their shape and height  They are cirrus and cumulus and stratus  Cirrus –white high thin .cumulus-round individual ,stratus-sheets
  • 10. High clouds fact http://eo.ucar.edu/kids/sky/c louds3.htm  Three family clouds make up the high clouds cirrus and cirrostratus and cirrocumulus  All high clouds are thin and white and are often made up of ice crystals  They are not considered precipitation makers
  • 11. Middle clouds fact http://www.bigbranch.net/mi ddle%20clouds.htm  They are larger and denser.  They are part of the altocumulus  Light snow or drizzle will accompany them
  • 12. Low clouds facts http://eo.ucar.edu/kids/sky/c louds1.htm  3 members –stratus and stratocumulus and nimbostratus  Fog like layer of clouds  Nimbostratus are the stable conditations
  • 13. Clouds of vertical development facts http://www.free-online-private-pilot- ground-school.com/Aviation-Weather- Principles.html  Some of the clouds do not fit into the height categories  They have their bases  The clouds are related to each other
  • 14. Fog (by cooling and by evaporation) facts http://epod.usra.edu/blog/2006/03/ad vection-fog-in-new-hampshire.html  Physically there is no difference between fog and a clound  Fog can form on cool clear and calm nights  When cool air moves across warm water it may evaporate
  • 15. Cold cloud precipitation(bergeron process) facts http://nanopatentsandinnovations.bl ogspot.com/2010/06/amount-of-dust- pollen-matters-for-cloud.html  Bergeron process is a theory  It relates to precipitation  Super cooled and freezing nuclei and the different saturation levels of ice and liquid water
  • 16. Warm cloud Fact http://www.frangardino.com/clouds/index. html  Air saturated with respect to water it is super saturated with respect to ice  Collision coalescence is a theory of raindrop formation in warm clouds  Large clouds collide and join together with smalle droplets to form raindroplets
  • 17. Rain and snow Facts http://fineartamerica.com/featured/la ke-rain-and-snow-darryl-kravitz.html  Light fluffy snow makes individual 6 sided crystals  Temps warmer then -5 ice crystals go into large clumps  Snowfalls of the snowflakes are heavy ,are high moisture contents
  • 18. Sleet glaze and hail facts http://scienceray.com/earth- sciences/the-mysteries-of-earth- science-rain-snow-and-hail/  Sleet-small particles of clear to translucent  Glaze-also knew as freezing rain it happens when super cooled raindrops  Hail- produce cumulonimbus cloud hailstones are small ice pellets but they get larger s they collect super cooled water cooled
  • 19. Thanks for watching it and grading it !hope you enjoyed it