Coriolis Force, (CF), is the force caused by the rotation of the earth.
It acts 90° to the wind direction causing air to turn to the right or veer in the Northern Hemisphere and to the left or back in the Southern hemisphere. CF is maximum at the poles and minimum at the Equator.
The Coriolis force is not a true force but is an explanation of the effect the rotation of the earth has on a free moving body not in contact with the earth. It is the combination of 4 factors:
CF = 2 Ω ρ V sin θ, where:
Ω = angular rotation of the earth
ρ = density
V = wind speed
θ = latitude
It should be noted that the CF is directly proportional to both wind speed and latitude. So an increase in either will result in an increase in the CF.