Winds Global Winds Chapter 16 Section 3 Pages Chapter 16 Section 3 Pages

Global Winds Winds that blow steadily from specific directions over long distances. Caused by unequal heating of the surface.

Global Winds

Coriolis Effect The way Earth’s rotation makes winds curve. –Winds want to move in a straight line but the earth rotates under them, making it seem as though the wind curved.

Coriolis Effect Northern Hemisphere- Earth rotates counter clock wise –All winds curve to the right.

Coriolis Effect Southern Hemisphere- Earth rotates clock wise –All winds curve to the left.

Doldrums At the equator. Area of Low Pressure –Rising Air Calm Winds

Horse Latitudes 30°N and 30°S Area of high pressure –Sinking air Calm Winds –Sailors would get trapped and run out of food and water, they threw their horses overboard.

Trade Winds Between the –Equator and 30°N. –Equator and 30°S Steady easterly winds. Sailors relied on them to carry goods from Europe to West Indies and S. America.

Prevailing Westerlies Mid-latitude winds –30°N-60°N –30°S-60°S Blow from west to east. Important to our weather. Blow away from the horse latitudes.

Polar Easterlies Between –60°N and 90°N –60°S and 90°S Cold air from the poles sinks and flows south away from the pole. Blows east to west. Cold Winds

Jet Stream 10km above the Earth’s surface. Bands of high speed winds. – km/hr Blow from west to east. They wander north and south.