Which of the following is/are planetary winds? North Westerlies Polar Easterlies South Westerlies East trade wind West trade wind

Which of the following is/are planetary winds? North Westerlies Polar Easterlies South Westerlies East trade wind West trade wind Correct Answer 1,2,3,4

  • Within the permanent pressure, belt wind tends to blow from high pressure to low pressure as the planetary wind.
  • The effect of rotation of earth tends to deflect the wind direction it's called the Coriolis force.
  • In the northern hemisphere, it tends to deflect to right whereas in the southern hemisphere it tends to deflect left this is called Ferrel's law of deflection.
  • The Coriolis force is absent at equator and tends to gradually increase towards the pole.
  • There are about 6 types of planetary wind
    • Polar Easterlies in the northern hemisphere
    • South Westerlies in the northern hemisphere
    • North East Trade wind in the northern hemisphere
    • Polar Easterlies in the southern hemisphere
    • North Westerlies in the southern hemisphere
    • South East Trade wind in the southern hemisphere
  • Trade Winds
    • The wind blows out from the subtropical high-pressure belt towards equatorial low.
    • Where in the northern hemisphere it is known as North East Trade wind.
    • Where in the southern hemisphere it is known as South East Trade wind.
    • Trade winds are the most regular winds of all the planetary winds.
    • Trade winds are also known as horse trade wind.
    • As they are subtropical cold wind they have a high capacity to hold moisture so they bring heavy rain to the eastern coast 
    • And the west coast suffers heavy aridity Sahara, Atacama, Kalahari, great Australian desert.
  • Westerlies
    • From the subtropical high-pressure belt wind blow towards the temperate low-pressure belt.
    • Under the effect of Coriolis force, they become south-westerlies in northern hemisphere and north-westerlies in the southern hemisphere.
    • In the northern hemisphere, they are more variable as they bring warm equatorial waters and winds to the western coast of temperate lands.
    • This warming effect creates variable local pressure differences dominated by cyclones and anticyclone in variable climate of temperate zones.
    • In the southern hemisphere, there is large open space from 40 degrees S to 60 degrees south so the wind blows at a very greater force.
    • In the southern hemisphere, it blows with greater regularities due to it.
    • They bring heavy rain, the weather is damp, cloudy, seas are violent and stormy.
    • It's also known as roaring forties, furious fifties, shrieking or stormy sixties.
    • All the west coast does not receive westerlies throughout the year
    • This is caused by the shift of wind belts, and that is because of the inclination that the sun moves from cancer to Capricorn
    • In June when the sun is at the tropic of cancer the belt move 5 to 10 degree north and in dec when at Capricorn it moves 5 to 10 degree south.
  • Polar Easterlies
    • It flows from polar high-pressure belt towards the temperate low-pressure belts.
    • They are more regular in the south than in the north.
    • They are extremely cold winds as they come from tundra and ice cap regions.

Related Questions