2 it is absorbed by the earth and re emitted as

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Unformatted text preview: entrations of carbon dioxide, methane and nitrous oxide over the last 10,000 years Greenhouse gases Absorb long wavelength (infra- red) radiaAon much more strongly than shorter wavelength solar radiaAon. Carbon dioxide (CO2) Water vapor (H2O) Methane (CH4) Nitrous oxide (N2O) Ozone (O3) Chlorofluorocarbons (CFC’s) Greenhouse gases Flask containing CO2 gas light source light detector Absorb long wavelength (infra- red) radiaAon much more strongly than shorter wavelength solar radiaAon. 1861 John Tyndall Visible light 1 Absorption 0 Sun light Infrared light from Earth CO2 The Greenhouse Effect Today’s atmosphere 1. Short-wave radiation (visible light) from the sun passes through the earth’s atmosphere. 2. It is absorbed by the earth and re-emitted as longer-wave radiation (infrared light). 3. Infrared light is absorbed by greenhouse gases in the atmosphere causing warming. A future atmosphere with more greenhouse gases What determines the temperature of Earth? A) How much visible light gets absorbed depends on how reflecOve the surface is (albedo). B) How much infrared light gets absorbed and heats the Earth depends on the concentraOon of greenhouse gases • The globally aver...
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This note was uploaded on 01/30/2014 for the course IB 105 taught by Professor Caceres during the Fall '08 term at University of Illinois, Urbana Champaign.

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