Winds that blow predominantly from a single general direction throughout the year are called “prevailing winds” (or permanent/planetary winds). These include the Trade Winds, the Westerlies and the Polar Easterlies. They are caused by the global distribution of pressure and the rotation of the Earth. ANSWER: (D) Prevailing winds
What is the name given to winds that blow in the same direction throughout the year? (A) Social winds (B) Polar winds (C) Local winds (D) Prevailing winds
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Prevailing winds are the “default” setting for the atmosphere. While local weather can cause the wind to blow from any direction on a given day, the prevailing wind is the direction recorded most frequently over a long period. These winds are crucial for determining a region’s climate; for example, if the prevailing winds blow from the ocean, the climate will be moist, but if they blow from a continental interior, the climate will be dry. They are the result of the Earth’s three-cell circulation model (Hadley, Ferrel and Polar cells).
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