Winds that blow from 30 degrees latitude to the equator are called trade winds. These air currents flow down to the equator from the northeastern region in the Northern Hemisphere and from the southeastern region in the Southern Hemisphere.
Trade winds are formed in regions known as the horse latitudes, which are subtropical areas characterized by high atmospheric pressures. These latitudes are found between 25 and 30 degrees, north and south of the equator. The high air pressure encountered by the wind currents in these locations drives the northeast to southwest movement of air in the Northern Hemisphere and the southeast to northwest movement of air in the Southern Hemisphere. These directional movements take into account the Coriolis effect in relation to Earth's rotation.