Instruments commonly used to measure wind speed are known as anemometers. They may feature a weather vane to help determine the direction of the wind.
Anemometers are commonly installed on weather stations and typically have several hemispherical cups attached to horizontal arms that rotate when contacted by wind. Other anemometers determine wind speed through the use of a propeller. The speed of the cups' or propeller's rotation determines the relative speed of the wind. Some scientific anemometers use the speed of sound to determine wind speed, air pressure and wind direction. These scientific instruments produce more precise measurements than cup and propeller anemometers.Learn More
Wind is caused by heat from the sun. The different substances on the Earth's surface absorb heat differently, causing changes in pressure and the air in the atmosphere to move.Full Answer >
A Chinook wind is a weather phenomenon that creates warm, dry air that blows down the eastern slopes of the Canadian Rockies. The name Chinook means "snow eater," as the wind occurs most frequently in winter and can disrupt snowstorms and melt fallen snow.Full Answer >
Wind is formed by differences in atmospheric pressure and the Sun's uneven heating of the air that envelopes the Earth. When the air is warmed it rises, and the cooler air near the Earth's surface flows in to take its place.Full Answer >
Winds affect the amount of precipitation received in an area. In contrast to the temporary effects of daily wind shifts, prevailing trade winds have a direct effect on a region's climate.Full Answer >