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GLOBAL WIND PATTERNS
By : Renu Rajbahak
Neha Adhikari
CONTENTS
• Wind
• Formation of wind
• Coriolis effect
• Types of winds: Global and Local wind
• Prevailing wind
• Location...
WIND RELATES TO AIR
• Air is the combination of all the gases –
that surrouds the earth atmosphere-
• -like carbon dioxide...
FORMATION OF WIND
• Begins with sun’s radiation- absorbed
differently on the earth’s surface and
heated differently –
• Du...
FORMATION OF WIND
• The behaviour when warm gases or liquids
moving upward and being replaced by
cooler particles is calle...
CORIOLIS EFFECT
• Wind appears to curve due to earth’s
rotation
• Northern hemisphere- wind curves to the
right
• Southern...
PRESSURE BELT
TYPES OF WINDS
• Different classified winds like gentle
breeze, moderate winds, strong winds gale
winds(end up as tornadoe...
TYPES OF WINDS
• Global wind - large air masses - created
mainly as a result of the earth’s rotation, the
shape of the ear...
TYPES OF WINDS
1. Polar easterlies- covers from 60° latitudes to the
north and south poles- wind blows from east to
west
2...
PREVAILING WINDS
• Prevailing winds are the directions that
wind typically come from a location
• Distribute large amounts...
LOCATION OF NEPAL
• The main latitude and longitude of
Nepal is 28° North and 84° East.
• small Asian country falls within...
CONCLUSION
• Hot/moist air rises up and cool/dry air
sinks down
• Low pressure due to hot air
• High pressure due to cool ...
• http://people.senecac.on.ca/kathy.kells/TGL200BB/Intro/winds.html
• Eschooltoday, 2010 http://www.eschooltoday.com/winds...
THANK YOU!
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Global wind patterns

  1. 1. GLOBAL WIND PATTERNS By : Renu Rajbahak Neha Adhikari
  2. 2. CONTENTS • Wind • Formation of wind • Coriolis effect • Types of winds: Global and Local wind • Prevailing wind • Location of Nepal
  3. 3. WIND RELATES TO AIR • Air is the combination of all the gases – that surrouds the earth atmosphere- • -like carbon dioxide, argon, oxygen, nitrogen, hydrogen and many more • The movement of Air from place to place, typically from a high-pressure area to a low-pressure area i.e, wind • Winds behave differently in many different places and conditions around the earth. A 'wind' is simply the flow of a huge amount of air, usually from a high pressure-area to a low-pressure area. Fig: layers of atmosphere Fig: pressure and wind direction
  4. 4. FORMATION OF WIND • Begins with sun’s radiation- absorbed differently on the earth’s surface and heated differently – • Due to cloud cover, water bodies, vegetation, uneven surface like mountains, valleys • Variation of temperature on earth surfaces • Air on surfaces with higher temperatures -begin to rise - it is lighter, - creates low atmospheric pressure • Air on surfaces with cooler temperatures sink - sinking creates higher atmospheric pressure. Fig: formation of wind
  5. 5. FORMATION OF WIND • The behaviour when warm gases or liquids moving upward and being replaced by cooler particles is called Convection. • The energy moving during convection is called convectional current. • Convection occurs in liquids and gases – land breeze and sea breeze • Sea breeze occurs at day time where as land breeze at night time Fig: formation of wind Sea breeze Land breeze
  6. 6. CORIOLIS EFFECT • Wind appears to curve due to earth’s rotation • Northern hemisphere- wind curves to the right • Southern hemisphere- wind curve to the right
  7. 7. PRESSURE BELT
  8. 8. TYPES OF WINDS • Different classified winds like gentle breeze, moderate winds, strong winds gale winds(end up as tornadoes and hurricane) • Types are: Local wind and Global wind • Local wind- created as a result of scenery such as mountains, vegetation, water bodies and so on- • ex:sea breezes and land breezes, and mountain and valley breezes. Slope wind
  9. 9. TYPES OF WINDS • Global wind - large air masses - created mainly as a result of the earth’s rotation, the shape of the earth and the sun’s heating power. • Types – 1. Polar easterlies 2. Prevailing westerlies 3. Tropical easterlies/ trade winds 4. Doldrums
  10. 10. TYPES OF WINDS 1. Polar easterlies- covers from 60° latitudes to the north and south poles- wind blows from east to west 2. Prevailing westerlies- covers 30° to 60° latitude to the north and south - wind blows opposite direction from west to east-Horse latitudes:Where the Westerlies meet the trade winds at about 30 degrees (Jacksonville, Florida) is the Horse latitudes, also Variables of Cancer, Subtropical High, or Subtropical ridge. This is a region of high pressure, dry air, and variable winds, and is associated with deserts over land. 3. Trade wind- covers 0° to 30° latitude- wind blows from east to west 4. Doldrums - 0° to 5° latitude to the north and south of equatorial area- very low pressure area caused by constant heating of the sun – calm area with very little wind
  11. 11. PREVAILING WINDS • Prevailing winds are the directions that wind typically come from a location • Distribute large amounts of solar energy across the world • Cause variety of precipitation like rain or snow
  12. 12. LOCATION OF NEPAL • The main latitude and longitude of Nepal is 28° North and 84° East. • small Asian country falls within the Tropic of Cancer and the Arctic Circle. • The climatic condition of Nepal is not typically a temperate one as the country is located at the foothills of the Himalayas.
  13. 13. CONCLUSION • Hot/moist air rises up and cool/dry air sinks down • Low pressure due to hot air • High pressure due to cool air • Coriolis –curve wind due to earth’s rotation • Types local and global wind
  14. 14. • http://people.senecac.on.ca/kathy.kells/TGL200BB/Intro/winds.html • Eschooltoday, 2010 http://www.eschooltoday.com/winds/the-coriolis- effect.html • https://quizlet.com/22270365/jet-streamsglobal-winds-flash-cards/ • https://quizlet.com/22270365/jet-streamsglobal-winds-flash-cards/
  15. 15. THANK YOU!
  • sakshidoijode

    Dec. 11, 2019
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    May. 20, 2019
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    Nov. 20, 2017

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