moisture, clouds, & precipitation - weebly
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Moisture, Clouds, & Precipitation
Chapter 18
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18.1 Water in the Atmosphere
Water vapor
● the most important gas to understanding atmospheric processes
● the source for all clouds and precipitation.
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Water Changes of State
Latent heat: heat (energy) required to change state without a change of temperature
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Humidity: amount of water vapor in the air
Water evaporates → air pressure increases
Saturated: 100% humidity, precipitation results
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Higher temps= more water vapor
Relative Humidity: a ratio to show how much water is in the air compared to how much it can hold at a given temperature. (shown in %)
Low temps= less water vapor
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Dew Point: the temperature at which relative humidity is equal to 100%
Video
Moisture condenses to form dew or fog
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Calculating RH & Dew Point