In this paper, based on the principle of virtual displacement, the changes in form of the particle system composing the fluid are calculated that leads to the "crowding" under the action of the Coriolis force. For a gas, the "crowding" will result in an imhomogeneous distribution of density, thus causing a pressure difference on both sides in the direction of its motion. Such "crowding" can serve as.a reference in finding the accurate solusion of the pressure distribution of air masses.