Regional Wind Systems 19.3<br />
Prevailing Wind<br />A wind that consistently blows from one direction more than from another. <br />
Anemometer <br />An instrument used to determine wind speed. <br />
El Nino<br />The name given to the periodic warming of the ocean that occurs in the central and eastern Pacific; A major E...
Key Concept <br />What causes local winds?<br />The local winds are caused either by topographic effects or by variations ...
Key Concept<br />Describe the general movement of weather in the United States.<br />In the United States, the westerlies ...
Key Concept<br />What happens when unusually strong, warm ocean currents flow along the coasts of Ecuador and Peru?<br />A...
Key Concept<br />How is a La Nina event triggered?<br />Researchers have come to recognize that when surface temperature i...
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Earth Science 19 3

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Earth Science 19 3

  1. 1. Regional Wind Systems 19.3<br />
  2. 2. Prevailing Wind<br />A wind that consistently blows from one direction more than from another. <br />
  3. 3. Anemometer <br />An instrument used to determine wind speed. <br />
  4. 4. El Nino<br />The name given to the periodic warming of the ocean that occurs in the central and eastern Pacific; A major El Nino episode can cause extreme weather in many parts of the world. <br />
  5. 5. Key Concept <br />What causes local winds?<br />The local winds are caused either by topographic effects or by variations in surface composition—land and water—in the immediate area. <br />
  6. 6. Key Concept<br />Describe the general movement of weather in the United States.<br />In the United States, the westerlies consistently move weather from west to east across the continent. <br />
  7. 7. Key Concept<br />What happens when unusually strong, warm ocean currents flow along the coasts of Ecuador and Peru?<br />At irregular intervals of three to seven years, these warm countercurrents become unusually strong and replace normally cold offshore waters with warm equatorial waters.<br />
  8. 8. Key Concept<br />How is a La Nina event triggered?<br />Researchers have come to recognize that when surface temperature in the eastern Pacific are colder than average, a La Nina event is triggered that has a distinctive set of weather patterns.<br />

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