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Weather
Atmospheric Movement Global air circulation patterns within the atmosphere held to Earth by gravity and warmed as heat ra...
Coriolis Effect The apparent defection of moving air, as seen by an observer on Earth; apparent defection is a result of ...
Air PressureThe force exerted on Earth’s surface by the weight of the air above the surfaceAir pressure is greatest at s...
Wind A natural movement of air sometimes with considerable force from an area of high density and pressure to an area of ...
Air MassesAn air mass is a body of air extending over a large area (1,000 miles or more) that develops and retains specif...
 An air mass forming over a hot desert  would be dry and hot. One forming over a cold marine surface  would be cold and ...
High-Pressure Air Mass An air mass with greater atmospheric pressure than the surrounding air masses; air moves away from...
High-Pressure Air Mass HIGHS are denser, cooler and dryer than  the adjacent air. The air is descending  toward Earth’s s...
Low-Pressure Air Masses An air mass with less  atmospheric pressure  than the surrounding  air masses; air moves  towards...
Warm Front Forms at the surface of Earth when  a warm, moist air mass overtakes a  cool, dense and dryer air mass Slow m...
Warm Front
Cold Front Forms at the surface of Earth when  a cold, dry air mass overtakes a  warmer, humid air mass Cold fronts are ...
Cold Front
Hurricane     A large, tropical      weather system      consisting of an      extreme low pressure      air mass with he...
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Weather

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Weather

  1. 1. Weather
  2. 2. Atmospheric Movement Global air circulation patterns within the atmosphere held to Earth by gravity and warmed as heat radiates from Earth
  3. 3. Coriolis Effect The apparent defection of moving air, as seen by an observer on Earth; apparent defection is a result of Earths rotation
  4. 4. Air PressureThe force exerted on Earth’s surface by the weight of the air above the surfaceAir pressure is greatest at sea level and lessens with increased distance from Earth’s surface.
  5. 5. Wind A natural movement of air sometimes with considerable force from an area of high density and pressure to an area of low density and pressure
  6. 6. Air MassesAn air mass is a body of air extending over a large area (1,000 miles or more) that develops and retains specific characteristics of pressure, temperature and humidity
  7. 7.  An air mass forming over a hot desert would be dry and hot. One forming over a cold marine surface would be cold and humid.
  8. 8. High-Pressure Air Mass An air mass with greater atmospheric pressure than the surrounding air masses; air moves away from the high pressure, traveling in a clockwise direction
  9. 9. High-Pressure Air Mass HIGHS are denser, cooler and dryer than the adjacent air. The air is descending toward Earth’s surface. HIGHS bring pleasant weather conditions in the summer and very cold clear weather in the winter.
  10. 10. Low-Pressure Air Masses An air mass with less atmospheric pressure than the surrounding air masses; air moves towards the low pressure, traveling in a counterclockwise direction Lows bring stormy weather.
  11. 11. Warm Front Forms at the surface of Earth when a warm, moist air mass overtakes a cool, dense and dryer air mass Slow moving and are characterized by a series of clouds getting lower and thicker as the front approaches.
  12. 12. Warm Front
  13. 13. Cold Front Forms at the surface of Earth when a cold, dry air mass overtakes a warmer, humid air mass Cold fronts are characterized by dramatic storms, thunder, lightning and sometimes tornadoes.
  14. 14. Cold Front
  15. 15. Hurricane  A large, tropical weather system consisting of an extreme low pressure air mass with heavy rains and wind speeds of at least 119km/h  Needs warm water to develop and stay strong

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