Coriolis frequency

The term 2 Ω sin φ is the Coriolis frequency.

The frequencies of these geophysical wave motions vary from a lower limit of the Coriolis frequency (inertial motions) up to the Brunt-Väisälä frequency, or buoyancy frequency (buoyancy oscillations).

The Coriolis frequency ƒ, also called the Coriolis parameter or Coriolis coefficient, is equal to twice the rotation rate Ω of the Earth multiplied by the sine of the latitude φ.

Its intensity per unit mass is proportional to the speed V and increases in magnitude from the equator (where it is zero) towards the poles proportionally to the local Coriolis frequency f (a positive number north of the equator and negative south).