Neglecting friction, the speed and direction of the horizontal wind are determined by:

Question

Quizplus · Accepted Answer

The speed and direction of the horizontal wind are primarily determined by the pressure gradient force (i.e. the difference in pressure between two points) and the Coriolis effect (i.e. the rotation of the Earth). Viscosity and turbulence can affect the flow of air to a certain extent, but they do not determine the overall direction and speed. Gravity and humidity or temperature and humidity do not have a significant influence on the horizontal wind.

Neglecting Friction, the Speed and Direction of the Horizontal Wind