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Prevailing Wind Patterns

Prevailing Wind Patterns

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Prevailing Wind Patterns

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  1. Prevailing Wind Patterns Student Handouts Weather Dynamics Unit Science 10 Mrs. S. Pipke-Painchaud

  2. Wind • “Movement of _________ in the _________” (Nelson Science 10 516). • Local or Regional Winds: • Prevailing Winds: • Winds • (Nelson Science 10 516)

  3. Coriolis Effect • Named after Gaspard deCoriolis • ______________ Mathematician • Because of the Earth’s ___________ anything moving ______________ distances appear to ______________ direction • “apparent change of direction in a moving object in a rotating system is called the Coriolis Effect” (Nelson Science 10 516). • (NS10 516) • “tendency for any moving body on or above the earth's surface, e.g., an ocean current or an artillery round, to drift _______________ from its course because of the earth's rotation” (InfoPlease.com) http://www.theozonehole.com/coriolis.htm

  4. Earth rotates ______________ • ________ Hemisphere (counterclockwise) – move to ____________ • __________________ Hemisphere (Clockwise) – move to ____________

  5. http://www.worldstats.org/general_world/maps/prevailing_winds_big.shtmlhttp://www.worldstats.org/general_world/maps/prevailing_winds_big.shtml

  6. http://research.haifa.ac.il/~maritime/departm/lessons/ocean/wwr199.gifhttp://research.haifa.ac.il/~maritime/departm/lessons/ocean/wwr199.gif

  7. Please refer to page 517 in your textbook • Figure 2 • Skim through the information on page 516 • In 1492, Christopher Columbus relied on two important prevailing winds to sail to the Americas and home again. • A) What wind did he use to travel to America? • B) What wind did he use to travel home?

  8. Animations • Danish Wind Industry Association • http://www.windpower.org/en/tour/wres/coriolis.htm • Exploring Earth • http://www.classzone.com/books/earth_science/terc/content/visualizations/es1904/es1904page01.cfm?chapter_no=visualization • http://www.classzone.com/books/earth_science/terc/content/visualizations/es1905/es1905page01.cfm?chapter_no=visualization

  9. Causes of Prevailing Winds • Please read through pages 518-519 • Jet Stream: • “a _________________ of fast moving air found in the _______________ atmosphere” (Univ. Illinois). • Can be _____________________ of km long • Few ___________ km wide • Few km ___________ • Generally, located ______________ km up • The position of this upper-level jet stream denotes the ________________ of the strongest _________________ temperature contrast” (Univ. Illinois). • http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/cyc/upa/jet.rxml

  10. Jet Stream Maps • Jet Steam Images: • http://www.weatherimages.org/data/imag192.html • Environment Canada: • http://weatheroffice.ec.gc.ca/jet_stream/index_e.html • Weather.com • http://www.weather.com/maps/activity/aviation/saturdayusjetstream_large.html • California Weather Service • http://virga.sfsu.edu/scripts/namjetstream_modelsml.html

  11. Effects of Prevailing Winds • “Remember that rising air tends to be ____________ and ________, while falling air tends to be _________ and ________” (Nelson Science 10 519). • Nelson Science 10 519

  12. Consider where convection currents meet • Equator: ________ and _____________ • 30* North Latitude: cool, dry falling air (________ like conditions) • Gobi (__________), Sahara (__________), Mojave (_________), Great Basin (NA) and Sonoran (NA) • Deserts of North America (info on Hot and Cold Deserts of the world) • http://mbgnet.mobot.org/sets/desert/ofworld.htm • 60* North Latitude: 2 air systems meet • __________________ conditions • Storms are _____________________ in the winter (because the Arctic receives no _______________ = ___________ = greater temp ________________ from equator) • Nelson Science 10 519

  13. http://www.mapsofworld.com/world-desert-map.htm

  14. Earth from Different Perspectives • Exploring Earth • http://www.classzone.com/books/earth_science/terc/content/visualizations/es0101/es0101page01.cfm?chapter_no=visualization • Environment Canada • Wind Info: • http://lavoieverte.qc.ec.gc.ca/meteo/Documentation/Vent_e.html • International Polar Foundation: • Katabatic and Anabatic Winds • http://www.antarctica.org/UK/Envirn/pag/vents_cata_UK.htm

  15. Sources: • Nelson Science 10 Textbook • Infoplease. Infoplease.com. Coriolis Effect • http://www.infoplease.com/ce6/weather/A0813558.html • University of Illinois • Jet Stream: http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/cyc/upa/jet.rxml