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  • 1. By: Alan Toppel html http://www.grancanaria- cloudy-weather-symbols.html
  • 2. Adiabatic Temperature Changes and Expansion and Cooling  Heat that changes if there is energy being added or subtracted  The rate of cooling an heating is unsaturated calling it dry adiabatic rate  The rate of cooling is saturated air calling it wet adiabatic rate  Wet adiabatic is always slower to convert to dry adiabatic rate
  • 3. Orographic Lifting  Orographic lifting is when air occurs elevation terrains like mountains as a barrier to let out the flow of air forcing the air to ascend out from the barrier of the mountains  ther/weathersymbol_10510.html  icons/large-weather-icons.htm
  • 4. Frontal Wedging  A front is a boundary colliding masses of warm and cool air  Frontal wedging is a process that occurs in the (a) front of which cold  Denser air acts as a barrier over warmer less dense air as it rises  l
  • 5. Convergence  Convergence lifts the air resulting from the lower air in the atmosphere flowing it together  The lower the atmosphere the more the lower air flows together with the atmosphere  Lifting air that results from air in the lower atmosphere flowing together
  • 6. Localized Convective Lifting  Localized convective lifting occurs unequally with the heating of the Earth’s surface  Earth’s surface warms a pocket of air more than the surrounded air in the surface  Lowering the air pocket’s density  weather_snow.svg
  • 7. Stability (Density Differences & Stability and Daily Weather)  The most stable conditions is when air temperature actually increases  Making it towards it’s height point calling it temperature inversion  When stable conditions make the air increase to the height it becomes temperature inversion
  • 8. Condensation  Condensation occurs from the air above the ground  Tiny bits of particulate matter calling it the condensation nuclei  Its serves as a surface(s) for water- vapor condensation
  • 9. Types of clouds  Three types of clouds make up the family of high clouds  Cirrus-clouds are high, white, and thin  Cumulus-clouds consist of rounded individual cloud masses  Stratus-clouds are best described as sheets or layers that cover much or all of the sky
  • 10. High Clouds  High clouds- all high clouds are thin and white and are often made up of ice crystals-cirrocumulus  They may warn of approaching stormy weather
  • 11. Middle Clouds  Middle clouds-clouds that appear in the middle range, from about 2,000 to 6,000 meters, they have the prefix alto-as part of their name-altocumulus  Infrequent light snow or drizzle may accompany these clouds
  • 12. Low Clouds  There are three members in the family of low clouds stratus, stratocumulus, nimbostratus  Occasionally, these clouds may produce light precipitation
  • 13. Clouds of Vertical Development  Some clouds do not fit into any one of the three height categories mentioned.  Once upward movement is triggered, acceleration is powerful  The end result often is a cumulonimbus cloud that may produce rain showers or a thunderstorm
  • 14. Fog (by cooling and by evaporation)  Fogs can form on cool, clear, calm nights when Earth’s surface cools rapidly by radiation  Cooling-As the air cools, it comes denser and drains into low areas (ex. river valleys)  Evaporation-Cool air moves over warm water.  Enough moisture may evaporate from the water surface to produce saturation
  • 15. Cold Cloud Precipitation  Ice crystals grow at the expense of cloud droplets  Cloud droplets do not freeze at 0 degrees C  Water droplets then evaporate to provide a continual source of water vapor for the growth of ice crystals that form through the clouds as they fall
  • 16. Warm Cloud Precipitation  Much rainfall can be associated with clouds located well below the freezing level-in the tropics  Warm clouds the mechanism that forms raindrops  Salt can remove water vapor from it’s relative humidities less than a 100%
  • 17. Rain and Snow  Rain means drops of water that fall from a cloud and have a diameter of at least 0.5 mm.  Snowflakes usually melt and continue to their descent as rain  Snowfalls of these snowflakes are heavy and have high moisture contents
  • 18. Sleet, Glaze and Hail  Sleet to form a layer of air with temperatures above freezing  Glaze also known as freezing rain, results when raindrops  Hail is produced in cumulonimbus clouds  Hailstone begin as small ice pellets that grow by collecting super-cooled droplets
  • 19. Merry Christmas!!  Merry Christmas Ms. Joseph! Have a good holiday with your friends and family!  Sincerely, Alan! ^_^