GEOG 1112 Notes 2

GEOG 1112 Notes 2 - -Carbon dioxide (CO 2 )-A trace...

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Geography August 23, 2006 Thickness of the atmosphere (approx. 100 km thick) -Density ( ρ ) decreases rapidly with height -The top of the atmosphere is undefined -Majority of mass is compressed near the surface Composition of the atmosphere -Gases and particles are exchanged between the surface and atmosphere Water vapor in atmosphere -0-4% by volume -Causes precipitation -Keeps heat in atmosphere -Greenhouse gas -Phase change Variable Gases -Water vapor -Most abundant variable gas -Added to/ removed from air through the hydrologic cycle -Concentrations equal nearly 0-4% -Important to energy balance and many atmospheric processes
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Unformatted text preview: -Carbon dioxide (CO 2 )-A trace gas-0.038% of atmosphere’s mass-Important to Earth’s energy balance-Added through biologic respiration, volcanic activity, decay, and natural and human-related combustion-Removed through photosynthesis-Increasing at a rate of 1.8 ppm/year-Ozone (O 3 )-Tri-atomic form of oxygen-Absorbs ultraviolet radiation-Chlorofluorocarbons (CFCs) destroy ozone-Destruction peaks over southern hemisphere-Antarctic circumpolar vortex limits latitudinal mixing-Leads to an ozone “hole”...
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This note was uploaded on 04/07/2008 for the course GEOG 1112 taught by Professor Frye during the Fall '08 term at UGA.

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