Chapter_2_notes - GEOG 101 Chapter 2 – The Global Energy...

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Unformatted text preview: GEOG 101 Chapter 2 – The Global Energy System Chapter 2 The Global Energy System ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ The Global Energy Balance • “Steady-state conditions” – no significant change of temperature over time • The sun is the source of virtually all energy on the earth – but not necessarily the direct source • Geothermal energy sources are negligible • Energy is transferred in the form of Electromagnetic Radiation ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Electromagnetic Radiation • Electromagnetic radiation can be described as a series of “waves” having different wavelengths • Wavelength is inversely proportional to frequency ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ 1 GEOG 101 Chapter 2 – The Global Energy System Electromagnetic Radiation ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Electromagnetic Radiation ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Electromagnetic Radiation • ALL objects at a temperature above absolute zero emit electromagnetic radiation • Wien’s Law: λ max x Temp = constant • Wavelength of maximum emission is inversely proportional to temperature • Sun – 5000 o C – 0.5 to 1.0 micrometers – Visible Light Spectrum SHORTWAVE • Earth – 15 o C – 5 to 10 micrometers – Far Infrared (Heat) Spectrum LONGWAVE ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ 2 GEOG 101 Chapter – The Global Energy System Electromagnetic Radiation ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ ___________________________________ Electromagnetic Radiation • Electromagnetic radiation can be: •...
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This note was uploaded on 10/28/2009 for the course GEOG 101 taught by Professor Lavin during the Fall '08 term at University of Delaware.

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Chapter_2_notes - GEOG 101 Chapter 2 – The Global Energy...

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