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The Roaring Forties are strong westerly winds active in the southern hemisphere.

  • They are found generally between the latitudes of 40°S and 65°S.
  • They are west to east air currents (and not east to west) which are caused by the combination of air displaced from the equator towards the South Pole. Hence, statement 2 is NOT correct.
  • Further, few landmasses serve as the windbreak for the formation of these roaring forties.
  • Westerlies blow from the subtropical high pressure belt to the subpolar low pressure belts.
  • They constantly blow from the west and hence called Westerlies.
  • They blow from south-west to north-east in the northern hemisphere and north-west to south-east in the southern hemisphere.
  • They are called Roaring forties because the southern hemisphere lacks landmass between 40-65°S latitudes to break the flow of the Westerlies
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