10 - -Global heat budget Input-solar energy-sun primary...

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GEOL 107L notes 9/10/10 Average amount of solar insulation hitting surface of earth is dependent on latitude and time of year. -Southern hemisphere is winter in northern hemispheres summer. -Equator gets most solar radiation, it weaker as you go away from it (up or down). -Global avg. insulation is ~150W/m2 -But there is uneven distribution of heat delivered to earth. -Whole earth receives ~84 terawatts (10^12) of solar power. -People use ~12 -Heat from earth interior ~44 terawatts. -This is the idealized pattern of solar insulation -Notice how maximal zone of heating moves from below equator to above, oscillating. Important for how weather patterns develop. -Amount of energy also depends on weather you are on land or in middle of ocean. Continents tend to be cloudy, plants help make clouds.
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Unformatted text preview: -Global heat budget, Input-solar energy-sun primary source. (Short wave radiation) Output- heat radiated or reflected from earth. ex. 100 input. ~35 right back out off atmosphere. ~4 go to earth and bounce back. 65 directly heat our planet. Heat in = heat out, heat budget is balanced. Black body radiation-long wave radiation. Sensible heat- convection and conduction. Latent heat- as water changes state (liquid, gas, solid) loss or gain of heat is involved. The heat to change phases. Albedo- fraction of light reflected from the earths atmosphere and surface back into outer space. the primary source of heat energy to drive the earths climate engine is solar insulation (short wavelength).-This input energy must be balanced by energy (long wave length)....
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This note was uploaded on 10/25/2010 for the course GEOL 107Lxg at USC.

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