Moisture, Clouds, & Precipitation - Weebly
Transcript of Moisture, Clouds, & Precipitation - Weebly
Moisture, Clouds, & Precipitation
Chapter 18
18.1 Water in the Atmosphere
Water vapor
● the most important gas to understanding atmospheric processes
● the source for all clouds and precipitation.
Water Changes of State
Latent heat: heat (energy) required to change state without a change of temperature
Humidity: amount of water vapor in the air
Water evaporates → air pressure increases
Saturated: 100% humidity, precipitation results
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
Dew Point: the temperature at which relative humidity is equal to 100%
Video
Moisture condenses to form dew or fog
Calculating RH & Dew Point