Chapter08c - Air Pr essur e and Winds I I I Cor iolis For...

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Unformatted text preview: Air Pr essur e and Winds I I I Cor iolis For ce (Effect) • I t is an apparent force; • Due to the rotation of the coordinate system (Earth); • I t makes a moving object deflect from a straight line even in the absence of any forces acting on it. Cor iolis For ce Demonstr ation Rotating table A B Dashed line- the trajectory of the chalk with respect to a non-rotating table. Solid line- the trajectory of the chalk with respect to a rotating table. The Magnitude of the Cor iolis For ce • The rotation of the Earth ♦ The faster the planet rotates the bigger the force • The speed of the object ♦ Bigger V -> bigger effect • The latitude : ♦ Min. at the equator ♦ Max. at the poles φ sin 2 V m F co Ω = φ sin 2 V m F co Ω = • The speed of the object • The latitude : ♦ Min. at the equator ♦ Max. at the poles Cor iolis for ce as a function of: The Dir ection of the Cor iolis For ce • I n the Northern hemisphere the deflection is to the right of the direction of motion. • I n the Southern hemisphere the deflection is to the left of the direction of motion. • The winds in the Northern hemisphere will be deflected to the right and in the Southern hemisphere they will be deflected to the left. ♦ Hurricanes spin differently in the Northern and Southern hemisphere The Cor iolis For ce and the Ear th • The Coriolis effect is important when moving over LARGE distances (air plane travel), with large velocities, away from the equator. Centr ipetal/Centr ifugal...
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This note was uploaded on 05/29/2011 for the course MET 1010 taught by Professor Matchev during the Spring '08 term at University of Florida.

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Chapter08c - Air Pr essur e and Winds I I I Cor iolis For...

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