climate3 - Global Climate Heat Transport Processes Summary...

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Global Climate - Heat Transport Processes Earth Heat in Heat out incoming short wavelength energy from the sun (UV, visible, near IR, wavelength = 0.2-1.0 μ m) balanced by outgoing long wavelength energy (far infrared, wavelength =10-15 μ m) average temperature (heat content) is constant steady-state condition Summary of last lecture
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Global Climate - Heat Transport Processes The earth and moon receive the same energy from the sun but the earth is ~ 50ºC warmer because of: the presence of an atmosphere Summary absorbs some incoming solar UV energy protective effect (ozone) small effect absorbs more outgoing IR energy the “greenhouse effect” (CO 2 , H 2 O) the largest effect
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Global Climate - Heat Transport Processes Average solar input = 2 calories / cm 2 min at the poles 0.1 cal / cm 2 min at the equator 10 cal / cm 2 min Variations in solar input with latitude
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Global Climate - Heat Transport Processes energy received energy lost heat transport from tropics to poles
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Global Climate - Heat Transport Processes On average, about 1/5 of the total heat absorbed by the Earth is transported away from the point where it was absorbed. 100 trillion calories per minute How much heat is transported between the tropics and the poles ?
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Global Climate - Heat Transport Processes oceanic circulation - currents atmospheric circulation - wind and weather It is the unique properties of water (both liquid and gaseous) that account for the majority of this massive heat transport. How is this heat transport accomplished?
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Global Climate - Heat Transport Processes The unique properties of water Water is so common, we take its unique properties for granted. Thermal properties (absorption and release of heat) heat capacity latent heat of fusion latent heat of evaporation
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Global Climate - Heat Transport Processes Heat Capacity energy to raise 1 gram of a substance by 1ºC
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This note was uploaded on 01/26/2009 for the course BIOPL 2400 taught by Professor Silva,t. during the Fall '08 term at Cornell.

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climate3 - Global Climate Heat Transport Processes Summary...

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