Global Hydrological Cycle Thermodynamic properties of water Humidity Water Vapor in the Air Vapor pressure Absolute humidity The mixing ratio Specific humidity Relative humidity Relative Humidity ID: 1026573
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1. Thermodynamics Atmosphere
2. Global Hydrological Cycle
3. Thermodynamic properties of water
4. Humidity: Water Vapor in the AirVapor pressure Absolute humidityThe mixing ratio Specific humidityRelative humidity
5. Relative Humidity
6. Relative Humidity
7. Relative Humidity
8. Clausius-Clapeyron Equation
9. Clausius-Clapeyron Equation
10. Exercises
11. Cold climates are dry-10ºCRH 100%27ºCRH 20%
12. Specific humidity and relative humidity
13. Specific humidity in altitude
14. Clausius-Clapeyron Equation
15. Condensation ProcessesCooling at constant mixture ratio – dew temperatureEvaporative cooling – wet bulb temperatureMixing a humid warm air mass with a cold air massAscent dry adiabatic process
16. Dew Point
17. Condensation by cooling
18. Condensation by coolingDew Temperature
19. Condensation ProcessesCooling at constant mixture ratio – dew temperatureEvaporative cooling – wet bulb temperatureMixing a humid warm air mass with a cold air massAscent dry adiabatic process
20. Evaporative cooling
21. Exercises
22. Condensation ProcessesCooling at constant mixture ratio – dew temperatureEvaporative cooling – wet bulb temperatureMixing a humid warm air mass with a cold air massAscent dry adiabatic process
23. Mixing humid warm air with cold air
24. Mixing fog
25. Steam fogCold dry air flows over a liquid water surface (lake, sea, etc)Lower air layer increases its water vapour content and becomes warmerMixing between the lower (warm and moist) and the upper (cold and dry) layers of air
26. Steam fog
27. Condensation ProcessesCooling at constant mixture ratio – dew temperatureEvaporative cooling – wet bulb temperatureMixing a humid warm air mass with a cold air massAscent dry adiabatic process – lifting condensation level
28. Lifting Condensation LevelInitial conditions:W=0.004T=20ºCZ=0mTdew=1ºCWhat happens to the vapour pressure as the air parcel ascends?
29. Lifting Condensation LevelInitial conditions:W=0.004T=20ºCZ=0mTdew=1ºCWhat happens to relative humidity as the air parcel ascends?
30. Lifting Condensation LevelInitial conditions:W=0.004T=20ºCZ=0mTdew=1ºCLCL:W=?T=?Z=? km
31. Lifting Condensation LevelInitial conditions:W=0.004T=20ºCZ=0mTdew=1ºCLCL:W=0.004T=-3ºCZ=2300m km
32. Condensation
33. Lifting Condensation Level
34. Moist Adiabatic Rate
35. Moist Adiabatic Rate
36. Moist Adiabatic Rate
37. Moist Adiabatic Rate
38. Moist Adiabatic Rate
39. Stability of the Atmosphere
40. Stability of the Atmosphere
41.
42. Stable Atmosphere
43.
44.
45. Exercises
46. Formation of Clouds