2_energy_budget - Earths Energy Budget Earth has 2 heat...

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Earth’s Energy Budget Earth has 2 heat engines: Internal External Internal Heat Engine Energy that drives plate tectonics Source = radioactive decay ~1/1000 th the energy provided by the sun
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Earth’s Energy Budget Earth’s External Heat Engine Energy provided by the sun Average global surface temperature = 15°C Balance between * Incoming solar radiation (electromagnetic spectrum, mostly visible light) * Outgoing terrestrial radiation (infrared radiation)
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Electromagnetic Radiation Form of energy received by the Earth from the Sun Wave/Particle duality Waves Self propagating electric and magnetic waves Wavelength (λ29 ( m 29 Frequency ( ν ) (#/sec) Speed = c = λν (m/sec)
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Electromagnetic Radiation Particles Stream of photons (particles, packets of energy) Energy of a photon * E = h ν or hc/ λ Where E = energy of a photon h = Planck’s constant (6.6 x 10 -34 kgm 2 /sec) ν = frequency c = speed λ = wavelength
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Electromagnetic Radiation E = hc/ λ E = h ν ν = c/ λ Short wave radiation: - high frequency - high energy Long wave radiation: - low frequency - low energy
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Electromagnetic Radiation Ruddiman 2-1 online 700nm Shortwave Longwave
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Electromagnetic Radiation Range of wavelengths emitted by any body is a function of its surface temperature Hotter Bodies Have higher energy
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