How Blows the Wind Student Presentation

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					How Blows the Wind?
     Charlsie Allen, NBCT
  OKAGE Teaching Consultant
Purpose
   To locate and identify wind patterns of
    the world;
   to describe their effect on the
    environment; and
   To identify and describe how humans
    have adapted life to these wind
    patterns.
PASS
   7th Grade
   Standard 3.1 Recognize regional climatic
    patterns … prevailing winds….
   Standard 5.0 The student will examine the
    interactions of humans and their
    environment.
   Standard 5.2 Evaluate the effects of human
    … adaptation to the natural
    environment…desertification….
A Legend…
The Ancient Greeks used
to think that wind was the
Earth breathing in and
out. We now know that it
is just…
air on the move.
Global Wind Patterns
 Air moves between different
  areas around the world.
 Air moves at different heights in

  the atmosphere.
Global Wind Patterns
 Colder air from the poles tends to
  sink and move towards the equator
  closer to the surface of the Earth.
 Warm air from the equator rises

  and moves towards the poles high
  in the atmosphere because it is
  lighter.
Coriolis Effect
 Causes distinct pattern of winds
  around the world.
 In the northern hemisphere, winds
  blow to the right.
 In the southern hemisphere, winds

  blow to the left.
Major Wind Patterns
   Westerlies
   Trade winds
   Roaring Forties
   The Doldrums
Wind Patterns
Wind patterns occur all over
 the world and these
 patterns have names
 given by local residents.
Chinook Winds
Location:
   North America
Chinook Winds
Source of wind:
   Cold arctic winds from northern
    Canada.
Chinook   Wind
Chinook Winds
Effects on environment
   Colder than usual winters
    throughout the United States
Chinook Winds
Impact on Humans:
 Colder winters cause higher
  heating bills.
 Cattle are lost in harsh winters

 Businesses lose money during bad

  winters.
El Niño and La Niña
Location:
   Pacific Ocean
El Niño and La Niña
Source of wind:
 Winds blowing East to West across
  the Pacific weaken and change
  course.
 The large warm air mass near
  Australia begins to move east
  toward South America.
      El Niño and La Niña

La Niña




El Niño
El Niño and La Niña
Incidence:
   In the past, every 4 to 5 years
   Recently, more often
El Niño and La Niña
Effects on environment:
   Severe storms in North and South
    America.
   Drought in Australia
   Polar jet stream moved north.
   Eastern United States has warmer
    winter.
El Niño and La Niña
Effects (continued)
 The Pacific jet stream moves
  further south than usual.
 Fierce storms hit California’s coast

  which usually has mild, sunny
  weather.
El Niño and La Niña
Impact on Humans:
 Thousands of deaths
 Billions of dollars lost around the
  world
Monsoons
Location:
   South Asia
Monsoons
Source of wind:
 Summer – Wet Monsoons begin in
  the Indian Ocean between India
  and Africa.
 Winds move northeast across India

  toward the Himalayas.
Monsoons
Incidence:
 Regularly each year
 Summer Monsoon – May to
  September
 Winter Monsoon – October to April
Monsoons
Effects on environment:
 Before the summer Monsoon rains,
  land mass heats to 120° F.
 Winter Monsoons bring cool land,

  mild temperatures, low humidity.
Monsoons
Impact on Humans:
 Monsoons are key to farming
  success.
 Seeds planted before Monsoon

  develop roots before the rains
  come.
Monsoons
Impact on Humans (continued)
 If Monsoons are late, young plants
  die, and famine follows.
 If Monsoons are early or too

  severe, young plants wash away,
  and famine follows.
Mistral
Location:
   Rhone Valley, France
Mistral
Source of Wind:
   Cold, north-westerly wind that blows
    down the Rhone valley.
Mistral
Incidence:
   100 days a year
Mistral
Effect on environment:
   Winds blow 40 to 80 mph
   100 days per year
   Trees grown permanently bent
Mistral
Impact on Humans:
   Homes have windows only on the
    southeast side for protection from the
    cold, dry wind that blows through the
    Rhone Valley.
Sirocco
Location:
    Wind blows from North Africa to
    Italy.
Sirocco
Source of wind:
   Over north Africa, winds become hot
    and dry and blow toward Italy
   Sirocco is a hot, dust-and-sand-laden
    wind especially common in summer
    blowing from Algeria northward.
Sirocco   Wind
Sirocco Winds
Sirocco
Incidence:
   Spring and Summer
Sirocco
Effect on environment:
 Supports the Mediterranean
  Climate with sunny, mild summers.
 Cool moist fall and winter replaces

  Sirocco.
Sirocco
Impact on Humans: Italy
 Encourages rain
 Climate allows Italian farmers to
  grow crops
Sirocco
Extension:
 What might happen to farmers if
  the Sirocco wind blew all year long?
 How might the climate of Italy be

  affected if there were no Sirocco
  wind?
Sirocco
Impact on Humans: Algeria
   Soil erosion from overgrazing
   Other poor farming practices;
   Desertification;
    Inadequate supplies of potable water
Harmattan
Location:
 South of Sahara
 West coast of Africa

 Algeria, Guinea, Guinea-Bissau
Harmattan
Source of Wind:
 Dry, dusty wind which blows south
  from the Sahara in winter.
 Brings dust storms and very dry air.
Harmattan
Incidence:
   Blows in winter
Harmattan
Effect on environment:
   Generally hot and humid;
   Monsoonal-type rainy season (June to
    November) with southwesterly winds;
   Dry season (December to May) with
    northeasterly Harmattan winds
Harmattan
Impact on humans:
 Hot, dry, dusty Harmattan haze
  may reduce visibility during dry
  season
 Inadequate supplies of potable
  water
 Desertification
Discussion Questions
Extension:
Is there a connection between the Sirocco
  and the Harmattan?
 Both begin in the Sahara

 Sorocco blows north in summer

 Harmattan blows south in winter
Other Named Winds
The Levante:
 an easterly Mediterranean wind
 bringing mild, moist air to Gibraltar
  and the mainland of Spain and
  Africa.
Other Named Winds
The Pampero:
   a very cold south westerly wind in
    Argentina
   formed in the middle of the continent
   blowing across the Pampas grasslands.
Resources
http://www.rcn27.dial.pipex.com/cloudsrus/activities.html Games and activities on weather,
    winds, and climate.

http://www.rcn27.dial.pipex.com/cloudsrus/wind.html Definitions of winds and wind patterns.

http://www.rcn27.dial.pipex.com/cloudsrus/features.html Weather and climate patterns.

http://www.cia.gov/cia/publications/factbook/geos/gv.html Facts and maps on most countries
    of the world.

				
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posted:5/2/2011
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