What is the reason for the typhoon's rotating direction?
The northern hemisphere is counterclockwise and the southern hemisphere is clockwise. Objects moving in a straight line in the northern hemisphere will turn right and the southern hemisphere will turn left, so the northern hemisphere is counterclockwise and the southern hemisphere is clockwise. The northern hemisphere and the southern hemisphere show different directions of rotation, which is related to the earth's rotation.
When the earth rotates from west to east, a geostrophic bias force, called Coriolis force, will be generated in this process. It is a description of the position deviation caused by the inertia of a particle moving along a straight line in a rotating system, and it is a virtual force.
The driving forces that determine typhoon movement can be divided into internal force and external force. The internal force of typhoon is mainly caused by the geostrophic deflection force accompanied by the rotation, airflow convergence and upward movement of typhoon itself. The internal force of typhoon is directly proportional to the radius of typhoon, the convergence and upward movement of air in vortex and tangential wind, and inversely proportional to the latitude of typhoon center.
Then most of the reasons for typhoon rotation come from the earth, because the earth is rotating, so the air mass will also rotate in the process of rising. Then when the air mass rises, it will not be a straight line, but a curve, which is why the typhoon rotates. Therefore, the direction of typhoon rotation has a great relationship with the earth, which mainly refers to the influence of the earth's geostrophic deflection on typhoons.