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Chapter6_AtmosphericMoistureC

Chapter6_AtmosphericMoistureC - decreases from 20 to 10 g...

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10/23/2011 1 80% of the water delivered as precipitation Hydrologic Cycle Phase Changes of Water A Cooling Process A Warming Process Relative Humidity Amount of water vapor in air compared to what air can hold at that temperature I kg air contains 10 g of water vapor. 75.2°F (24°C); capacity of air is 20g/kg 5 g of water vapor added through evaporation, temp remains constant.
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10/23/2011 2 Relative Humidity Temp = rela Ɵ ve humidity goes down Temp = rela Ɵ ve humidity goes up if the temperature increases from 75.2°F to 89.6°F, the water vapor capacity increases from 20 to 30 g, and so relative humidity decreases: if the temperature decreases from 75.2°F to 59.0°F, the capacity
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Unformatted text preview: decreases from 20 to 10 g, and so relative humidity increases: 10/23/2011 3 5.5°F per 1,000 feet 3.5°F per 1000 feet 3,280.83 6,561.66 9,842.49 13,123.32 latent heat is released 10/23/2011 4 • Warm Air Near Ground Rises • Expands as it Rises • Cools Adiabatically • Condensation Begins • cumulus cloud forms • Updrafts & Downdrafts Develop • Cover a Small Area • Showery, Short ‐ Lived • Warm Air Rises Upslope • Cools Adiabatically • Rain Develops on Windward Side • Midlatitudes 10/23/2011 5 collisionandcoalescenceofwaterdroplets ice ‐ crystalformation Sleet 10/23/2011 6...
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Chapter6_AtmosphericMoistureC - decreases from 20 to 10 g...

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