LECT3(Energy) - AOM 4932 Earth's Energy Balance The hydrologic cycle is fueled by energy from the sun Planetary geometry creates areas of energy

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AOM 4932 - Earth's Energy Balance The hydrologic cycle is fueled by energy from the sun. Planetary geometry creates areas of energy surpluses and deficits which drive all active meteorological processes. These processes originate to redistribute energy throughout the system. Earth and the atmosphere are the media through which the energy transport occurs oceans and atmosphere are more active in this redistribution than land mass. Water transport and phase changes [i.e. liquid (oceans) vapor (humidity) liquid (precipitation)] play a major role energy transport Energy - flow for the earth as a whole Radiation measured with a pyranometer or radiometer. Important aspects of the earth's energy balance : 1. Short-wave energy from the sun moves through the atmosphere to the earth more easily than longwave energy can move from earth through the atmosphere. This keeps the planet warm (similar to greenhouse glass). 2. Planetary geometry creates areas of energy surpluses and deficits. Incoming solar radiation is uneven because the earth is a sphere which rotates on a tilted axis. Outgoing radiation is more uniform because the temperature of earth’s atmosphere does 1 short-wave solar radiation entering atmosphere - 99.998% reflected from particulates in air, clouds and the earth’s surface - 30 % longwave radiation emanated - 70 % longwave radiation from clouds, vapor, etc. back radiation from earth - 20% earth heat entering atmosphere - 0.002 % (geothermal) absorbed by earth - 51% absorbed by atmosphere (water vapor, dust, clouds) - 19 % latent heat and sensible heat flux - 30 % unit area time N m (energy) energy Radiation rate measured in Joules m 2 sec or calories cm 2 sec Note:1 cal cm 2 = 1 langley (ly)
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not vary all that much from the equator to the poles (~ 30 ° C). Energy gradients drive global energy transport processes such as wind and ocean currents. 3.
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This note was uploaded on 03/27/2012 for the course AOE 4643 taught by Professor Graham during the Fall '11 term at University of Florida.

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LECT3(Energy) - AOM 4932 Earth's Energy Balance The hydrologic cycle is fueled by energy from the sun Planetary geometry creates areas of energy

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