We move counterclockwise in the Northern Hemisphere, and clockwise in the Southern Hemisphere. In the Northern Hemisphere, objects moving in the north-south direction will deflect to the right, which is affected by the geostrophic deflection force.
In fact, it’s not just this. The right bank of the river is washed by water flow to a much greater extent than the left bank; the wind blowing from north to south on the earth always turns to east wind; the rotation of tornadoes are all caused by the earth’s The influence of steering force. In physics, this force is called the Coriolis force.
Take a bath, for example, this is a very common thing. However, Professor Shepiro, the chairman of the Department of Mechanical Engineering at the Massachusetts Institute of Technology in the United States, keenly noticed that every time the bath water is drained, the vortex of the water always rotates counterclockwise. Why is this? Shepiro clung to this question mark and conducted repeated experiments and research. In 1962, he published a paper arguing that this kind of vortex is related to the rotation of the earth. If the earth stopped rotating, this kind of vortex would not be produced. Since the earth keeps rotating from west to east, and the United States is in the northern hemisphere, the bath water will flow in the opposite direction. Rotate clockwise, and the typhoon in the northern half also rotates counterclockwise. The principle is the same as the whirlpool of bath water. He also asserted that if in the Southern Hemisphere a whirlpool of bathwater would spin clockwise, at the equator no vortex would form. His insights aroused great interest among scientists from various countries. They conducted experiments in various places, and the results proved that Shepiro's conclusion was completely correct
Also because the vortices on the earth are caused by the movement of liquids. It is formed by the influence of the deflection force of the earth's rotation, and the rotation of typhoons is also similar. At the equator, the rotational deflection force is zero, so vortices cannot form. Similarly, typhoons cannot form on the equator.