The Earth rotates, and this
movement affects direction of atmospheric circulation, the most essential
effect being expressed as an outward deflecting force. Coriolis, the deflective
force, in the absence of other forces deflects moving objects by hemisphere, the
right being north and left in the south. Winds travelling from the North Pole then
become easterlies as they are deflected right, and as a whole, Coriolis plays
an important role in deciding general patterns of atmospheric circulation.
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