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Water in the Atmosphere

Water in the Atmosphere. Review: How does water get into the atmosphere?. Heat Energy. Heat Energy. Condensation. Clouds Rain Snow Sleet Hail. HUMIDITY. The amount of water vapor in the air. WARM air can hold MORE water than cold air. This is why . . . Hot August days feel “muggy.”

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Water in the Atmosphere

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  1. Water in the Atmosphere

  2. Review:How does water get into the atmosphere?

  3. Heat Energy Heat Energy

  4. Condensation • Clouds • Rain • Snow • Sleet • Hail

  5. HUMIDITY The amount of water vapor in the air

  6. WARM air can hold MORE water than cold air

  7. This is why . . . • Hot August days feel “muggy.” • Your skin dries out in the winter. • Phoenix is more comfortable than Orlando

  8. How does sweating cool your body?

  9. Where in the world does sweating NOT cool your body? • Tropical jungle • Ultra-hot desert

  10. RELATIVE HUMIDITY The % of water in the air compared to how much water the air could hold

  11. PSYCHROMETER • Tool used to measure relative humidity

  12. Psychrometer • Dry bulb • Wet bulb • The DIFFERENCE between the 2 is used to calculate Relative Humidity

  13. Steps to calculate Relative Humidity: • Measure dry-bulb temperature • Measure wet-bulb temperature. • Subtract the two to determine the difference. • Use a relative humidity table to determine % of water vapor in the air.

  14. Example: • Dry = _____ • Wet = _____ • Difference = _____ • Go to table:

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