chapter 4 cont'd - Chapter 4 Atmosphere and Surface Energy...

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Chapter 4 Atmosphere and Surface Energy Balances
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Energy Balance at Earth’s Surface: Subtopics Radiation Balance by Latitude Daily Radiation Patterns Simplified Surface Energy Balance The Urban Environment Focus Topic : Solar Energy
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Radiation Balance by Latitude 36 ° N 36 ° S Tropics: High angle of insolation; Little seasonal variation Tropics: More radiant energy is gained than lost- Surplus Poles: Low insolation; High albedo; No sun for 6 months Poles: More radiant energy is lost than gained- Deficit These differences “drive” a global circulation pattern of mass and energy transfer; tropical hurricanes Figure 4.13
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Daily Radiation Patterns Figure 4.15 Peak in temperature occurs when the maximum insolation is absorbed and reradiated to the atmosphere from the ground Figure 4.14
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Surface Energy Balance Shortwave insolation Shortwave reflection Longwave infrared Longwave infrared (radiated) + SW SW + LW LW = NET R + insolation reflection + infrared infrared = Net Radiation Figure 4.15 NET R = balance of all radiation at Earth’s surface
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