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Weather Variables

Terms in this set (11)

dew point
the temperature at which condensation occures
relative humidity
the ratio of the actual amount of water vapor in the air to the capacity of the air to hold moisture at a given temperature. Generally expressed as a percent (%).
barometric pressure
atmospheric pressure as indicated by a barometer
weather station model
the symbols used to represent the weather conditions of a location on a weather map
air pressure
the weight of the atmosphere at any particular point
condensation
the change in state of matter from a vapor to a liquid.
barometer
an instrument that measures atmospheric pressure
knots
unit of measurement for wind velocity
millibar
unit of measurement for air pressure
pressure gradient
the rate of pressure change occurring over a given distance (to calculate: change in field value divided by distance)
sling psychrometer
instrument used to measure dew point and relative humidity
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