Aerovane- Aerovanes are commonly used at many weather stations and airports to measure both wind direction and speed. They are similar to wind vanes and cup anemometers except have three-bladed propellers attached to the end of the vane.
Aerovane A device that resembles a wind vane with a propeller at one end. Used to indicate wind speed and direction.
Air density Mass per unit volume of air; about 1.275 km per cubic meter at 0ºC and 1000 millibars.
Aerovane A wind instrument that indicates or records both wind speed and wind direction.
Air density See Density.
Air mass A large body of air that has similar horizontal temperature and moisture characteristics.
Aerovane: Observing Wind Direction & Wind Speed. 2. Anemometer: Observing Wind Speed. 3. Barometer: Observing Barometric Pressure. 4. Barograph: Observing & Recording Barometric Pressure. 5.
 See also: Meteor, Anemometer, Advection, Low, Norther
  
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