Coriolis force is absent at the equator, and its strength increases as one approaches either pole. Furthermore, an increase in wind speed also results in a stronger Coriolis force, and thus in greater deflection of the wind. Coriolis force only acts on air when it has been sent into motion by pressure gradient force. Finally, Coriolis force only influences wind direction and never wind speed. The strength of Coriolis force is influenced by latitude and the speed of the moving object.
Centripetal acceleration is the third force that can act on moving air.
It acts only on air that is flowing around centers of circulation. Centripetal acceleration is also another force that can influence the direction of wind. This force produces a circular pattern of flow around centers of high and low pressure. Centripetal acceleration is much more important for circulations smaller than the mid-latitude cyclone . The last force that can influence moving air is frictional deceleration .