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ATOC 1050 radiation and heating handout

ATOC 1050 radiation and heating handout - Heating and...

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Heating and Cooling the Earth– NOT in your Text!!!! ATOC 1050 I. Controls of temperature: A. Latitude B. Land/Water distribution or Continentality C. Major wind belts D. Ocean currents E. Elevation II. Seasons (Northern hemisphere/Southern hemisphere): A. Autumnal Equinox (Sept. 22/Mar. 20) B. Winter Solstice (Dec. 21/June 21) C. Vernal Equinox (Mar. 20/Sept. 22) D. Summer Solstice (June 21/Dec. 21)
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III. Heat transfer: *Heat energy is always transferred from higher to lower temperatures! A. Conduction – Molecular heat transfer in a solid B. Convection – Molecular heat transfer in a liquid or gas C. Radiation – Heat transfer by electromagnetic waves – no medium necessary 1. Wavelength (distance between wave crests or troughs) 2. Wien’s Law: λ max = 2898/ Temperature where: λ max = maximum wavelength Wien’s Law says that the higher the temperature, the shorter the wavelength.
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3. Stefan-Boltzmann Law: E = σ ε T 4 where: E = Total energy (W/m 2 ) σ = Stefan-Boltzmann constant (5.67 X 10 -8 W/m 2 K) ε = emissivity (varies between 1 and 0) T = temperature
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