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Unformatted text preview: -gas and water exchange between ocean and atmosphere-Air-can hold water vapor: up to ~4% by volume-Density varies:-density decreases with altitude-warm air is less dense than cold air (think of a hot air balloon)-humid air is less dense than dry air-warm air can hold more water vapor than cold air-gas temperature and pressure:-air cools when it expands, warms when it is compressed-rising warm air tends to form droplets as it expands and cools-Air mass and pressure-air column from sea level to top of atmosphere weighs about 1 kg (2.3 pounds) per cm^2-mass produces pressure: 14.7 pounds per square inch at sea level (1 bar or 1000 millibars)-expands and cools when pressure is reduced-contracts and warms when pressure is increased-Heat budget-over very long term, whole earth is in thermal equilibrium: heat in= heat out-Solar heating of earth varies with attitude-equal amounts of sunlight spread over more surface area near the poles than in the tropics...
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This note was uploaded on 03/16/2012 for the course GEOSCI 105 taught by Professor Tobin during the Spring '12 term at Wisconsin.
- Spring '12