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  1. 1. By: Jorge Rodriguez
  2. 2.  When temperature is changing even though heat isnt being given or taken away When air expands it cools and when air is compressed it gets warm, when this happens this is called dry adiabatic rate When cooling is at a slower rate because of heat is being added it is called wet adiabatic
  3. 3.  Mountains act as barriers to air flow  As air goes up the mountain slope adiabatic cooling begins to make clouds and precipitation  When the air reaches the leeward side of he mountain most of its moisture has been lost and condensation and precipitation is less likely to happenhttp://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.  When masses of warm air and cold air collide producing a front Cool denser air act as a barrier over the less denser air. Weather producing fronts are associated with specific storm systems which is called middle latitude cyclones
  5. 5.  When air flows in from more than one direction it begins to flow upward because it cant go down Causes cloud development and precipitation Air movement and the rise of it is helped by solar heating of the land
  6. 6.  When the volume of air was forced to rise, its temperature will drop because of its expansion The warm air that is less dense in its surrounding air, will keep going upward until it reaches a altitude where its temperature equals its surrounding air When stable air is moved above the earth surface, the clouds that form are widespread and have little vertical thickness.
  7. 7.  When water vapor in the air changes to a liquid When condensation happens in the air above the ground, tiny bits of particulate matter called condensation nuclei are used as a surface for water vapor condensation When condensation happens the growth rate of cloud droplets is very rapid
  8. 8.  All clouds are one of these basic forms: cirrus, cumulus and stratus Cirrus clouds are high white and thin, they have a feathery appearance also occur as delicate veil like sheets Cumulus clouds normally have a flat base and look like rising domes or towers, they clouds are describe of having a cauliflower structure Stratus clouds are layers that cover up most of the sky
  9. 9.  Normally have a bases of 6000 meters Three could types make up the family of the high clouds, cirrus, cirrostratus and cirrocumulus All high clouds are thin and white and are often made up of crystal ice High clouds are not consider precipitation makers
  10. 10.  Middle clouds occupy heights from 2000 to 6000 meters, have the prefix alto in their name Altocumulus clouds are larger and denser than cirrocumulus clouds Altostratus clouds a white and grayish sheet covering the sky with the sun or moon Light snow or drizzle may accompany these clouds
  11. 11.  Low clouds form below 2000 meters there are three members of the low cloud family they are stratus, stratocumulus and nimbostratus Stratus clouds are a fog like layers of clouds the cover up most of the sky Stratocumulus clouds are when stratus clouds create a scalloped bottom that appear long parallel rolls Nimbostratus clouds form during stable air, this cloud is one of the main precipitation makers
  12. 12.  These clouds aren’t in any of the other three height categories, they are in the low height range Often extend to middle or high altitude They are all related to unstable air except the cumulus cloud, that is connected to fair weather
  13. 13.  Fogs are the result of radiation cooling or the movement of air over a cooled surface Fogs can also form by cool air because of the earth surface cools rapidly by radiation Fog also is caused by evaporation because when rising water vapor meets cold air it begins to condense and rise with the air that is being warmed from below
  14. 14.  The bergeron process relies on two physical process which is super cooling and supersaturated Super cooling is when water is in the liquid state but under 0 degrees Celsius Supersaturated is when air is 100 percent relative humidity
  15. 15.  salt the water absorbing particle can remove water vapor from the air even if the relative humidity is less than 100 percent Large water droplets form the humidity that is being taken away as these droplets move through the clouds they begin to collide
  16. 16.  The term rain means water that falls from clouds and that a diameter of .5 mm When temperature is above 4 degrees Celsius snow flakes will melt and turn into rain before they hit the ground When temperatures are warmer than -5 degrees Celsius ice crystals join together a become bigger clumps
  17. 17.  Sleet is small particles of clear translucent that form from temperatures above freezing overlie a subfreezing ground Glaze is also known as freezing rain but they form when rain drops become super cold as they fall through subfreezing air Hail is produced in the cumulonimbus cloud they are in the shape of small ice pellets that grow as they collect super cooled rain drops