Heat Transfer

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Heat Transfer

• How does energy transfer through our atmosphere?

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Solar Energy

• The sun is the source of all energy in Earths
  atmosphere
• The energy is transferred in three ways
• Radiation
• Conduction
• Convection

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Radiation

• Radiation is the transfer of energy through
  electromagnetic waves
• Anything with a temp above 0K radiates energy
• The earth absorbs 50 of the suns radiation
• Radiation does not directly heat the atmosphere

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Conduction

• Conduction occurs between two objects that are in
  contact with each other
• Example pot on stove
• The lowest layers of the atmosphere are heated by
  conduction

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Convection

• Convection is the flow of energy through a heated
  substance
• The heated substance rises as it loses density
• The substance cools at the top of a cycle,
  compresses to increase density, and sinks
• The cycle repeats as long as there is heat
  transfer to the substance

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Temperature vs. Heat

• Temperature is the measure of how quickly
  molecules move
• Heat is the transfer of energy between two
  substances in contact
• Heat flows from higher temperature to lower
  temperature

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Dew Point

• The temperature air must be cooled at constant
  pressure to reach saturation is the Dew Point
• Saturated air cannot hold any more water vapor
• When air reaches its dew point, Condensation
  occurs, causing rain or other precipitation