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Presentation transcript:

GLOBAL WINDS (C) Copyright all rights reserved

WHAT IS WIND? Wind is the movement of air caused by an uneven heating of the Earth’s surface. Image from: (C) Copyright all rights reserved

WHAT HEATS EARTH’S SURFACE? Heat from the sun heats the surface of the Earth. This heat arrives to Earth in the form of radiation. Radiation is the transfer of energy by electromagnetic waves. Radiation can transfer heat without direct contact between objects. Solar radiation originates from the sun. Image from: (C) Copyright all rights reserved

COLLABORATION TIME TWO MINUTES Image from: (C) Copyright all rights reserved

CONVECTION CELLS Winds do not travel straight from the equator to poles. Due to the cycling of hot, low pressure and less dense air with cold, high pressure, more dense air, wind travels via convection cells. Convection cells are: Pockets of cycling warm, less dense, low pressure air with cool, denser high-pressure air. Pressure difference results in global movement of air. Image from : (C) Copyright all rights reserved

WHAT ARE GLOBAL WINDS? Global winds are winds that are produced by the movement of air between the equator and the poles. Image from (C) Copyright all rights reserved

COLLABORATION TIME TWO MINUTES Image from: (C) Copyright all rights reserved

MAJOR GLOBAL WINDS Polar Easterlies Westerlies (prevailing) Trade winds Doldrums Horse Latitudes (C) Copyright all rights reserved

DOLDRUMS Little or low wind area near the equator where warm air rises. Image from : (C) Copyright all rights reserved

TRADE WINDS Winds that blow from the horse latitudes toward the equator. Image from : (C) Copyright all rights reserved

COLLABORATION TIME TWO MINUTES Image from: (C) Copyright all rights reserved

HORSE LATITUDES Little or low wind area where air is falling. Found at 30 degrees latitude. Image from : (C) Copyright all rights reserved

WESTERLIES (PREVAILING) Winds that blow from the west to the east. Found between 30 and 60 degree latitudes. Image from : (C) Copyright all rights reserved

POLAR EASTERLIES Winds that blow away from the poles. Blows from east to west. Found between the poles and 60 degrees latitude. Image from : (C) Copyright all rights reserved

COLLABORATION TIME TWO MINUTES Image from: (C) Copyright all rights reserved

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