GEOL150_Week3_lecture1_energy_balance

GEOL150_Week3_lectur - GEOl50 Climate Change University of Southern California Los Angeles Earth’s Energy Balance Insolation& the seasons

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Unformatted text preview: GEOl50: Climate Change University of Southern California, Los Angeles Earth’s Energy Balance Insolation & the seasons Earth’s basic energy balance Earth receives short-wave (visible) radiation Earth emits long-wave (infrared) radiation Thermal equilibrium means the 2 must be equal When they ʼ re not: climate change happens.... Today : the sunny side Earth Sun geometry Variations in insolation Seasons Albedo Koppen Climate Zones Strong latitudinal dependence Four fundamental geometrical features that explain a lot of things: Earth is round Earth orbits around the sun ( revolution ) Earth turns on its axis ( rotation ) That axis is tilted Orbital alignment to the Sun variations in solar energy with day and season Explains a lot of climate&weather features, purely from a geometric standpoint Earth Sun Geometry Sphericity Determines angle of incidence (cf shadow) Solar Angle Radiation is proportional to solar angle Higher angles equal reduced beam spreading = greater heating Angle of incidence...
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This note was uploaded on 10/04/2010 for the course GEOL 150Lxg taught by Professor Stott during the Spring '07 term at USC.

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GEOL150_Week3_lectur - GEOl50 Climate Change University of Southern California Los Angeles Earth’s Energy Balance Insolation& the seasons

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