Ch. 2 Sec. 3WINDS

OBJECTIVE #1: Describe the factors that influence wind.

OBJECTIVE #2: DISTINGUISH BETWEEN LOCAL AND

GLOBAL WINDS AND LOCATE THE MAJOR WIND BELTS.

1. WIND: The horizontal movement of air from an area Of high pressure to an area of low pressure.

2. Winds are caused by differences in air pressure.

3. Wind direction: Measured with a wind vane.Wind speed: Measured with an anemometer.

4. Wind Chill Factor: The increased cooling that a windCan cause.

5. Local Winds: Blow over short distances – Caused byUnequal heating of Earth’s surface within a small area.

6. Sea Breeze: A wind that blows from an ocean or lake To the land.

7. Land Breeze: The flow of air from land to a body of Water.

9. Global Winds: Winds that blow steadily from a specificDirection over long distances. The movement of airBetween the equator and the poles create global winds.

10.Coriolis Effect: The way the Earth’s rotation makesWinds curve.

11.The major global wind belts are the trade winds, Prevailing westerlies, and polar easterlies.

12.Doldrums: There is very little horizontal motion, so theWinds near the equator are very weak. Regions near the Equator with little or no wind are called Doldrums.

13.Horse Latitudes: 30* N and 30*S Latitude the air stopsMoving toward the poles and sinks. This creates an areaOf calm.

14.Latitude: distance from the equator, measured in Degrees.

15.Trade Winds: Between 30*N and 30*S Latitudes and the Equator.

Northern Hemisphere: They blow NortheastSouthern Hemisphere: They blow Southeast

*These helped sailors carry cargoes to South America16.Prevailing Westerlies: Play and important part in the Weather of the United States.

P.W. Blow from the Southwest between 30*-60* N LatitudesP.W. Blow from the northwest between 30*-60* S Latitudes

17.Polar Easterlies: Has a major effect on weather changesIn the U.S. Located 60*N & S latitudes to the poles.

18.Jet Streams: Bands of high speed winds (200-400 KM per hour) That are about 10 KM above Earth’s surface.