Meteorology study of the atmospheric phenomena

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Meteorology study of the atmospheric phenomena
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Ch 12 Meteorology

• Weather current state of the atmosphere
• Climate weather over a course of time. (30
  years)

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Air Masses

• Air mass is a large body of air that takes on
  the characteristics of the area over which it
  forms.
• HowStuffWorks Videos "Weather Types of Air
  Masses"

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Do not copy Classifying Air Masses

• Lower case c continental (dry)
• Lower case m maritime (wet)
• Upper case T tropical (hot)
• Upper case P polar (cold)

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4 types

• cT- continental/tropical (dry/hot)
• cP continental/polar (dry/cold)
• mT maritime/tropical (wet/hot)
• - mP maritime/polar (wet/cold)

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Weather Patterns

• Coriolis Effect deflection of air due to the
  rotation of earth on its axis.
• Produce distinct global wind systems.
• HowStuffWorks Videos "Atmosphere Earth's
  Rotation"

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Coriolis Effect
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Wind cells

• Doldrums area of low pressure at the
  equator.(windless zone)
• Trade winds wind cell between the equator and
  30 N and S

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Horse Latitudes

• area of high pressure at 30 degrees N and S
  latitude. (subtropical high)

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Prevailing Westerlies

• Prevailing westerlies wind cell flowing between
  30 and 60 degrees north and south latitude.

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Wind Cells

• Polar easterlies major wind cell between 60 and
  90 degrees N and S

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Jet stream

• Jet stream narrow bands of fast, high altitude
  westerly winds. (jets of water)
• 1. Polar jet stream occurs where the
  easterlies meet the westerlies.

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Jet stream

• Subtropical jet stream occurs where the trade
  winds meet the westerlies.
• HowStuffWorks Videos "Wonders of Weather Wind
  and Weather Fronts"

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Frontal systems

• Front is a narrow region separating two air
  masses of different densities.

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4 kinds of fronts
Do Not Copy

• Cold front
• Warm front
• Stationary front
• Occluded front

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Cold front

• Cold front when cold, dense air displaces warm
  air. (warm air rises, reaches dew point,
  condenses and causes precipitation)
• HowStuffWorks Videos "Weather Cold Fronts"

draw
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Draw symbol
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Arrival of a cold front

• Approaches from west or northwest towering
  clouds often seen in distance
• Near the front, dark band of clouds
• Heavy downpours
• Vigorous wind gusts associated with mature
  cumulonimbus
• Precipitation greater than warm front but shorter
  duration
• Marked temperature drop and wind shift from SW to
  NW with frontal passage
• Clearingsoon after front passes.