Atmosphere and Ocean



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Hot things rise

Cold things sink

All winds on earth are convection currents. They move vertically (up and down) when warm low pressure (lighter/less dense) air rises and cooler high pressure (heavier/more dense) air sinks. Winds move horizontally (side to side) because of the earth’s rotation. Winds are always described by the direction they come from.


Convection cells are large bodies of moving air. They are global wind patterns that are named for the direction they come from.



Atmosphere and Ocean - 8

The Coriolis Effect is the cause of worldwide wind patterns in which winds are deflected and move to the right in the northern hemisphere and move to the left in the southern hemisphere. The Coriolis Effect is caused by the earth’s rotation. Cool air from the polar regions sink down while warm air from the equator rises. The rotation causes the winds to be deflected.





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