Inertial wave lakes, and laboratory experiments. Rossby waves, geostrophic currents, and geostrophic winds are examples of inertial waves. Inertial waves are also likely to exist in the molten core of the rotating Earth. Inertial waves are restored to equilibrium by the Coriolis force, a result of rotation. To be precise, the Coriolis force arises (along with the centrifugal force) in a rotating frame to account for the fact that such a frame is always accelerating. Inertial waves, therefore, cannot exist without rotation. More complicated than tension on a string, the Coriolis force acts at a 90° angle to the direction of motion,
Winds in the Age of Sail the Canary current which pushes him southwest down the African coast. He soon reaches the northeast trade winds which also push him southwest. If he leaves in late summer he will hit the trade winds sooner since wind systems move north and south with the seasons. The problem was to get back again. The solution was the volta do mar in which a captain would sail northwest across the winds and currents until he found the westerlies and was blown back to Europe. The coast of Northwest Africa might be described as the nursery of European imperialism. Experience gained here