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What is up with CO2?
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1870
2005
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Temperature is the average kinetic energy
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Motion and the phases of matter
Solid Liquid Gas
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Types of Motion
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Available and Absorbed Solar Energy
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O= C =OO= C =O
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Greenhouse Gases
Infrared Radiation Emitted
Infrared Radiation Absorbed by Greenhouse
Gases
Some Infrared Radiation Emitted to Space
Greenhouse Gases Emit Infrared Radiation Up and
Down
Some Infrared Radiation Emitted to Space
Infrared Radiation Absorbed by Earth
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http://phet.colorado.edu/simulations/sims.php?sim=The_Greenhouse_Effect
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Increasing Concentrations of Greenhouse Gases
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E E
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% Transmittance
100% Light
Single Wavelength
20% Light
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Atm Concentrations and Warming
GasPre-1750
(ppb)Current
(ppb)
Global Warming Potential
Increased Radiative Forcing(W/m2)
CO2 280,000 383,900 1 1.66
CH4 700 1731 25 0.48
N2O 270 320 298 0.16
O3 25 34 n.a. 0.35
CCl3F 0 0.244 4,750 0.063
CCl2F2 0 0.538 10,900 0.17
Recent Greenhouse Gas Concentrations: cdiac.ornl.gov/pns/current_ghg.html
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100 200 300 400 500 1000 2000 5000 10,000 50,000
Wavelength (nm)
In a sense, CO2 closes the window
trapping heat!
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Conclusion• More CO2, then more trapped heat!
• As Infrared light is absorbed by CO2, it is emitted up and down equally.
• The more CO2, then the more infrared energy send back down to the ground.
• In a sense recycling, infrared energy.
• More CO2, more acid, less shell, less shellfish.