Radiative transfer in global energy balance

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ATOC 4720 class27

• Radiative transfer in global energy balance
• The globally averaged atmospheric energy balance

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1. Radiative transfer in global energy balance
Plancks law Stefan-Boltzmanns law
Wiens displacement law Kirchhoffs law
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Effect of atmosphere on radiation
Scattering
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Reflection
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Longwave emission
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Processes important for energy balance

• Scattering of solar radiation by clouds (albedo)
• Absorption of solar radiation by gases (O3 upper
  atmosphere and H2O lower atmosphere)photodissoci
  ation
• Absorption of terrestrial radiation by gaseous
  constituents (CO2, H2O, O3) green house effect
• Absorption of terrestrial radiation by clouds,
  enhance green house effects example

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2. The globally averaged atmospheric energy
balance
Blackboard demonstration see class notes for
detail.
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