Latitudinal Circulation Features
The wind belts girdling the planet are organised into three cells: the Hadley cell, the Ferrel cell, and the Polar cell. Contrary to the impression given in the simplified diagram, the vast bulk of the vertical motion occurs in the Hadley cell; the explanations of the other two cells are complex. Note that there is one discrete Hadley cell that may split, shift and merge in a complicated process over time. Low and high pressures on earth's surface are balanced by opposite relative pressures in the upper troposphere.
Read more about this topic: Atmospheric Circulation
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