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Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
Pg tp-class21-humidity
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Pg tp-class21-humidity

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Transcript

  • 1. Class 21: Humidity
  • 2.  A measure of how much water vapor is in the air
  • 3. 20% 60% 0% 0% 0% 0% 20% 0% 1. Transpiration 2. Evaporation 3. Deposition 4. Sublimation 5. Condensation 6. 1, 2 and 3 7. 2, 3 and 5 8. 1, 2 and 4
  • 4. 0% 20% 20% 40% 20% 1. Condensation increases 2. Evaporation increases 3. Condensation + evaporation increas 4. Evaporation decreases 5. Both condensation and evaporation decrease
  • 5. 60% 0% 20% 20% 0% 1. Will lead to high rates of evaporation 2. Will lead to low rates of evaporation 3. May lead to condensation 4. 1 and 2 5. 2 and 3
  • 6.  Actual amount of water vapor ◦ Absolute Humidity ◦ Specific Humidity ◦ Vapor Pressure ◦ Dew Point
  • 7.  Mass of water vapor/volume of air  Units: grams/cubic meter  Maximum potential absolute humidity related to temperature  Temperature increase = increase in potential maximum
  • 8.  Mass of water vapor per mass of air  Grams of water vapor/kilograms of air
  • 9.  The portion of air pressure that comes from water vapor  Units: same as air pressure (millibars)  Saturation vapor pressure = maximum possible  Above saturation  condensation
  • 10. 1. Evaporation 2. Transpiration 3. Condensation
  • 11. 1. Add more moisture and lower temperature 2. Remove water vapor and lower temperature 3. Add more moisture and raise temp 4. Remove water vapor and raise temp
  • 12. 1. Relative humidity will increase 2. Relative humidity will stay same 3. Relative humidity will decrease
  • 13. 1. Warm air 2. Cold air
  • 14.  As air cools, maximum water vapor can be reached.  Dew Pt temperature = temp. at which this occurs  100% Relative Humidity or Saturation
  • 15. 1. The actual amount of water vapor in the air 2. The relative humidity
  • 16. 1. A high amount of water vapor 2. A low amount of water vapor 3. A high relative humidity 4. A low relative humidity
  • 17. 0% 0% 0% 0% 0% 0% 0% 0% 1. By evaporation of more water 2. By condensation of more water 3. By lowering temperature 4. By raising temperature 5. 1 and 3 6. 2 and 4 7. 1 and 4 8. 2 and 3
  • 18.  Hot and dry vs. hot and humid (heat index)  Cold and humid vs. cold and dry  Wind chill

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