ES 11_9_09 Atmosphere Fossil Fuels

ES 11_9_09 Atmosphere Fossil Fuels - Earths Atmosphere 7 8...

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Earth’s Atmosphere • 78% Nitrogen molecules (N 2 ) • 21% Oxygen molecules (O 2 ) • 1% Water vapor, argon, carbon dioxide, trace gases Properties used to define the atmosphere • Temperature (average movement of molecules) – Molecules move faster as things get hotter – Only at -273 Celsius (0 Kelvin) is there no molecular motion • Heat (total movement of molecules)
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4 layers based on temperature properties • 2 layers heat from the bottom • 2 layers heat internally
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Visible Light from the Sun Infrared from Earth Heat (Infrared) from the Earth • Sun’s light energy goes through the atmosphere and is absorbed by the Earth • Earth re-radiates that energy as heat • The troposphere is heated from the bottom
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Convective Instability in Troposphere (weather) • Wind patterns created because most of sun’s energy falls on the equator – has to circulate out • Hot “fluid” below a cool “fluid” – Just like boiling water in a pot • This convection of air gives us wind and weather
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Earth’s Convection Cells Hadley Cells • Due to Earth’s rotation on its axis, there are actually 3 convection cells per hemisphere
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This note was uploaded on 12/26/2009 for the course LSP T07.5005.0 taught by Professor Caseyking during the Fall '09 term at NYU.

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ES 11_9_09 Atmosphere Fossil Fuels - Earths Atmosphere 7 8...

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