Global air circulation is influenced by the Coriolis Effect

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Presentation transcript:

Global air circulation is influenced by the Coriolis Effect

OBSERVED Global convection creates not one big 0 – 90 degree cell, but a set of three N and S of the equator The surface winds created by the convection cells do not flow N-S as expected WHY?

Because the earth rotates on it’s axis The equator has the greatest rotation; the poles the least

A SET of convection cells is created

to the left in the southern hemisphere WINDS ARE DEFLECTED to the right in the northern hemisphere to the left in the southern hemisphere http://www.youtube.com/watch?v=Wda7azMvabE http://www.youtube.com/watch?v=mcPs_OdQOYU

The horizontal aspect of each convection cell, although in a north-south direction, creates east-west air flow and winds

Net effect is to create a set of convection cells that circulate roughly N/S, creating winds that move air E/W

A set of convection cells are created every 30 degrees of latitude

Plus E/W winds

Well, maybe not so simply….