GG101 Study Guide - Quiz Guide: Prentice Hall

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16 Oct 2011
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The atmosphere is only 0. 03% of fresh surface water. As the pocket of air gets warmer you can hold more vapour, as it gets colder it holds less water vapour. Cool parcel of air until it gets to dew point temperature. Or can add almost 20 mb of pressure. Dew point temperature is the point on a thermometer. Dew point temp means pocket of air has reached capacity of water vapour (saturation). Water vapour on side of glass is cooling down, so it cools to dew point temp. (relative humidity is 100%) With a hot cup you would be heating the air, so you would make air dryer on surface. Sdown is the fuel that drives all processes: As you go down atmosphere there is more pressure on parcel of air so relative humidity increases. This is because of the pushing down of molecules above.