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1. Which humidity variable is plotted here as a function of temperature? temperature, ºF.

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1 1. Which humidity variable is plotted here as a function of temperature? temperature, ºF

2 2 Which humidity variable is shown in blue? Temperature (°F) sunrise 24 hours sunset dewpoint

3 temperature, ºF 3. This temperature is also a humidity variable. What is it called ? x x initially the temperature at which saturation is reached

4 14. Assume a daytime temperature of 24°C and a vapor pressure of 18 mb. a.What is the saturation vapor pressure ? b.Calculate the relative humidity (show the equation) c.Does dewfall occur if the minimum at dawn, next day, is 10°C? d.What is the vapor pressure at dawn? x (you can use the chart at the end of the exam)

5 5. What is the name of this chart?

6 6. What is the name of this instrument?

7 Relative humidity paradox: The outside air (temperature: 18°F) has less water vapor (4 mb) than the inside air (temperature: 70°F, vapor pressure 8 mb) yet a higher RH temperature vapor pressure (mb) 18 F70 F 4 8 7. Explain this paradox! outside inside

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