The Ozone Problem

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The Ozone Problem

• O3

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The Ozone Problem

• CFCs
• Chlorofluorocarbons
• Methyl bromide
• Results
• More UV radiation
• Growth reproduction
• Decrease photosynthesis

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Sulfur Compounds

• Self-supporting thermal control system

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Atmospheric Motion
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Nonrotating Earth

• Equator
• Warming and rising of air
• Rising air cools as it ascends
• Surface winds blow towards equator to replace
  ascending air
• Poles
• Cool, dry air descends

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Effects of Rotation

• Coriolis Effect

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Coriolis Effect

• Coriolis effect is the apparent deflection of
  objects moving across Earths surface
• The deflection is caused by the differential
  speed of rotation between Earths equator and
  polar regions, relative to an object moving
  across the Earths surface.

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Global Wind Bands

• Hadley cells
• Subtropical cells
• Air rises at the equator due to solar heating,
  and falls due to cooling at 30º

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Global Wind Bands

• Ferrel cells
• Temperate cells
• Occurs between 30º and 50-60º latitude
• Some air descending at 30º turns poleward

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Global Wind Bands

• Polar cells
• Centered over each pole
• At 50-60º, the air is warm and wet enough to
  ascend, but too dense to mix with Ferrel cell

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Wind Patterns

• Between Cells
• Vertical air movement
• Weak surface winds
• Within Cells
• Horizontal air movement
• Strong surface winds

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Wind Patterns

• Between Cells
• Hadley cells
• Doldrums
• Near the equator
• Decrease in pressure gradient
• Variable breezes
• Intertropical Convergence Zone (ITCZ)

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Wind Patterns

• Between Cells
• Hadley and Ferrel cells
• Horse latitudes
• 30º latitude
• Subtropical high pressure
• Sinking air dry
• Many deserts are found at this latitude

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Wind Patterns

• Within Cells
• Hadley cell
• Trade Winds
• Easterlies
• Centered at 15º
• Ferrel cell
• Westerlies
• Centered at 45º
• Polar cell
• Easterlies
• 60-90º