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Ch17_Lecture - Today's Epitome Roll Lab 2 3 turn in...

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05/06/09 GEOL1401/tob 1 Today’s Epitome Today’s Epitome Roll Lab 2 & 3 turn in Questions Ch 16 review Describe the science of meteorology Explain the differences between weather and climate List the most important elements of weather and climate List the major and variable component in air Describe the extent and structure of the atmosphere Describe how the atmosphere is heated Explain the causes of the season List factors that cause temperature to vary form place to place Describe the general distribution of global surface temperature Some lecture on Ch 17  Next time Lab on Atmospheric heating Data for Albedo and land and water heating experiments are in the Blackboard folder
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05/06/09 GEOL1401/tob 2 GEOL 1401 – Chapter  GEOL 1401 – Chapter  17 17 Moisture, Clouds, and  Moisture, Clouds, and  Precipitation Precipitation Dr. Thomas O. Bush Roberts 116 [email protected] 214-333-5318
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05/06/09 GEOL1401/tob 3 Heat Energy Heat Energy Heat energy      Measured in calories – one  calorie  is the  heat necessary to raise the temperature of  one gram of water one degree Celsius  Latent heat Stored or hidden heat  Not derived from temperature change  Important in atmospheric processes  
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05/06/09 GEOL1401/tob 4 Changes of state of water Changes of state of water
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05/06/09 GEOL1401/tob 5 Humidity Humidity  Amount of water vapor  Amount of water vapor Saturated air air that is filled with water vapor to capacity  Capacity is temperature dependent warm air has a much greater capacity  Water vapor adds pressure (called  vapor pressure ) to the air  Mixing ratio Mass of water vapor in a unit of air compared to the remaining  mass of dry air  Often measured in grams per kilogram  Relative humidity  Ratio of the air's actual water vapor content compared with the  amount of water vapor required for saturation at that temperature  (and pressure) 
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05/06/09 GEOL1401/tob 6 Relative humidity changes at  Relative humidity changes at  constant temperature constant temperature
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05/06/09 GEOL1401/tob 7 Relative humidity changes at constant  Relative humidity changes at constant  water-vapor content water-vapor content
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05/06/09 GEOL1401/tob 8 Dew point temperature
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