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  • General Knowledge – Wind System – Notes For W.B.C.S. Examination.
    Posted on March 7th, 2019 in General Knowledge
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    General Knowledge – Wind System – Notes For W.B.C.S. Examination.

    সাধারণ জ্ঞান – বায়ু সিস্টেম – WBCS পরীক্ষার জন্য নোট।

    Air in motion is known as wind. Wind plays a significant role in determining the weather system of a given region.Continue Reading General Knowledge – Wind System – Notes For W.B.C.S. Examination.

    Because of the rotation of the Earth, wind deflects to the right in the Northern Hemisphere and left in the Southern Hemisphere. The phenomena first reported by Coriolis and hence it is known as Coriolis Force.

    To read the wind direction, weather vanes are used; however, at the airport, windsocks are used (indicated the wind direction).

    Anemometer is used to measure the wind speed.

    Types of Winds

    • Winds normally are categorized as −
      • Primary Winds: It is also known as Prevailing Winds and Planetary Winds.
      • Secondary winds: It is also known as Periodic Winds and Seasonal Winds.
      • Local Winds: It is originated because of the local temperature and/or pressure difference.
    • Major Planetary Winds (as shown in the following image) are −
      • Polar Easterlies
      • Westerlies (Mid-latitude)
      • Trade Winds (Tropics)
    • Seasonal or Periodic Winds blow periodically i.e. for a specific period. For example, Monsoons (as shown in the following image).
    • Local Winds, which are originated largely because of the temperature differences are a localized phenomenon. The following map shows the major local winds of the world −
    Local Winds Region/Location
    Chinook Canada & USA (Rockies Mountain Region)
    Santa Anas California (USA)
    Pampero Argentina (South America)
    Zonda Argentina (South America)
    Norte Mexico (Central America)
    Papagayo Mexico (Central America)
    Foehn Switzerland (Alps Region)
    Salano South Spain
    Mistral France
    Tramontana North Italy
    Levant South France
    Helm England
    Etesian Greece
    Berg South Africa
    Sirocco Sahara Region (North Africa)
    Khamsin Egypt
    Gibli Tunisia
    Harmattan (also known as Doctor Wind) West Africa
    Bora South & South Eastern Europe
    Loo Northern India & Pakistan
    Simoon Arabia
    Buran (also known as Purga) East Asia
    Karaburan Central Asia
    Brickfielder Victoria (Australia)
    Norwester New Zealand

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